How to set-up a Dellorto PHBH carburettor on almost every Lambretta & Vespa scooter! - Part 1
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- Опубліковано 14 лип 2024
- How to set-up a Dellorto PHBH carburettor on almost every Lambretta & Vespa scooter! - Part 1
The PHBH is possibly the most underrated carb for Lambretta & Vespa scooters, repeatedly overlooked in favour of more ‘exotic’ setups. Yet the PHBH is affordable, available, easy to set-up, and has a great balance of cost vs performance vs fuel economy. It’s the CBR600 of carburettors... a brilliant allrounder!
Plus, for the vast majority of scooter owners, there are some very repeatable ‘base settings’ which you can use, for around 90% of all scooters, in order to get your ballpark starting point to work from and go on to perform plug chops with. There are also some crucial mistakes you must not make, as these can kill an engine very quickly if not followed.
00:00 Intro
03:51 Don't confuse the PHBH & PHBL
05:20 Jetting Info
12:00 Overview
12:43 Reprise: air screw vs mix screw
Part 2: • Part 2: How to set-up ...
Part 3: • Part 3: How to set-up ...
Amazon links to further resources…
Suggested reading:
The Complete Spanner's Manual: Lambretta Scooters: amzn.to/3qX3R1v
Haynes VESPA Service & Repair Manual: amzn.to/3rNR2aY
Haynes Vespa Scooters 1959 - 1978: amzn.to/3rPov4M
Two-stroke Performance Tuning: amzn.to/3eG8quk
Motorcycle Tuning: Two-Stroke: amzn.to/3qSUpMd
Oil:
Castrol A747 Racing Oil: amzn.to/38GfUda
Castrol ‘Power 1’ Two-stroke oil: amzn.to/3eJe3Ie
Parts:
Supergrip Lambretta 5 Plate Clutch Kit & Springs: amzn.to/3bLeK1Y
Lambretta Adjustable Rear Shock Absorber: amzn.to/3qHYOli
Lambretta Viton Engine Oil Seal Kit: amzn.to/3rKWlrw
Vespa PX/PE/T5 Viton Oil Seal Kit: amzn.to/3cA6VuX
Security:
Oxford OF802 Monster Chain & Lock 1.5m: amzn.to/3vo3Ab3
Oxford OF178 GP Chain Lock: amzn.to/3eHleAS
Oxford Products OF34 Disc Lock: amzn.to/3bLiX5M
Cleaning:
Muc-Off Clean, Protect & Lube Kit: amzn.to/2Q85n3Z
Muc-Off Cleaner, 1 Litre: amzn.to/38CX7z9
WD-40 Degreaser 500ml: amzn.to/2OS6u7o
WD-40 OIL 450ml: amzn.to/2OwV2OB
T-Cut: amzn.to/3cBKnKi
Autosol: amzn.to/3cBKnKi
Tools:
Syphon pump kit: amzn.to/3eH5TQv
5l Fuel Can: amzn.to/2Q6EjSL
Flexible funnel: amzn.to/3vq72Su
Home hobby compressor: amzn.to/3bOU756
Sealey 14 Drawer Topchest and Rollcab Combo with 239 Pcs Tool Kit: amzn.to/3rQxsuH
Gunson timing light: amzn.to/3eFd0cl
Vlog equipment:
Dragon Touch 4K Action Camera: amzn.to/3rSjhoG
GoPro HERO8 Black Bundle: amzn.to/30JVxHJ
For more info: www.scooterfactory.co.uk
#scooter #scooterist #scootering #scooterfactory #lambrettaengine #vespaengine #Vespa #Lambretta #dellorto #phbh #holedpiston #lambrettascooter #vespascooter - Розваги
What a great video thanks for explaining in an easy to understand way. . Pretty much bang on with mine on my Imola 186.
Apart from I’ve a 50 pilot. I’m now going to change to a 55. My needle is an x13 but on the top. I’ve also got a power jet and I run a breathe sweet filter.
Right into the garage I go. The missus has just moaned but needs must 🤣🤣
Clear simple explanation of the best carbs for Lambretta's, well done Dan.
Thank you for this, it sheds some light on a lot of things !
I'm trying to correctly jet a Honda CRM125 (same engine as the NSR125 save for the base jetting) outkitted with a 182cc Malossi (which purportedly likes to run even leaner than the 125 jug).
The base carb was a PHBH28 which was fitted with a 45 pilot, 142 main, X57 needle, 40 slide and 50 powerjet, but the powerjet was making more trouble than it had advantages, so I upgraded to a PHBH30BS (R3478 which comes with a 50 slide and X41 needle.
I'm waiting on a 300 feeder and AV266 bushing to replace the 268T 4-stroke atomizer which came stock with the 30mm and currently have a EV266 (it came with the 28mm which was outfitted from the factory. Dellorto UK have never heard of this kind of atomizer apparently), a 52 pilot and 142 main.
Which combo of needle/slide would you recommend as the safest starting point in both cases (right now and once I've fitted the AV266) ?
TY !
Always good advice and explain so well. Good work
Great video, very clear information. Thanks very much! 👍🏼
Thanks Larry 👍
Great information dan keep up the good work
8k views and only 40 likes? What wrong with people? Thanks for this valuable info. Carbs and electrics are the Bain of my life!!!
Great vid. Cheers!
i can remember coming down a long steep hill as a naive youngster on a 225, backed off throttle went into a full lock up and came off...
great tip, pull in clutch and blip the throttle... 🤕
cheers from south australia
Common mistake, easy fix :)
Great video Dan. The selection of over sized carbs goes back to when tuners & racers were sticking Mk2 34 mm Amal's on just about everything and we as young scooterists wrongly, wanted the same. Times have changed, fuels and two stroke oils have moved on as has what is now available to todays scooterist. But you still need a basic understanding to keep yourself on the road and not just blame whoever gave you the advice or sold you the part - you can't legislate for the stupidity factor. Keep sharing the good info's 👍
Wayne Booth yup, the ‘bigger is better’ train of thought is easy to follow, the trick is knowing when enough is enough and not going too big 😂👍
I own a 2010 Aprilia RS 125 and have a stock 28mm PHBH. I’m tuning as it’s running rich AF!
I fitted a 30mm Dellorto carb to my GT225 back in 1970, it worked well at that time and improved up hill pulling power too.
Just great information Dan as always don’t see much of you these days 🤔👍
Busy at the garage
Dan that was great video! I have just had a rebuild TV200 Engine Mugello 225, 22ml Delorto Carb & and Scootopia exhaust. I get approx 10 miles per Gallon. It’s run in and I’ve clocked 700 Miles and it nicely run in ! I use 4% PP2. I’d like to unleash some of the power, without losing reliability and good Mileage. I’m not looking for balls out! My nearest dyno centre is Coastal Trippers. Please advise Kev Brum 👍
Kevin Doherty take a look at the 25mm PHBL if you want to retain the elbow and airbox, or the 26mm PHBH if that’s doesn’t bother you. In either case, see if Coastal Trippers can dial it in for you.... as 10mpg is chronic!
The Scooter Factory sorry 10miles per Litre! Thanks for the advice 👍
Hi Dan,
I just watched your video on the recommended changes for the Dellorto PHBH 30 which was great . Could you provide your replacement jets etc for a Dellorto PHBL 25 to try and resolve my bogging issues on my 185 Kitted Li125 special. It starts first kick and idles fine but bogs on pull away and after gear changes.
🤞👍
I've just inherited a cut down P200 with a built engine. There's a welded and ported top end.. And with a phbh 30... It's a bad byotch. But I'm coming in blind and trying to figure the tubing as I try to bring it back to life. Here we go!
Hi could you tell me how to jet a 25mm dellorto phbl on a rt195 kit through the bgm airbox. I'm suffering with 4 stroking at 1/4 throttle. Many thanks.
Great video Dan... I have a RT 195, gori pipe, li150 gearbox, and a 28 and 30 mm open mouth carb what would you recommend and jetting wise?
Hi Dan, great vid, very helpfull. Can I ask do you dialin both the air screw and mix screw and bring them out 1.5 turns to start with thanks.
Carbs usually have one or the other. If it’s behind the slide it’s generally a mix screw, therefore turning out richens it up. If it’s in front of the slide, then it’s usually an air screw... so turning it out leans it off.
hi dan
i have just fully rebuilt my li 125 1963. iv put a gp crank in, 175 kit, 12v system on it and still got the original carb, is this any good or would i have to upgrade it? tried to start it with a good spark but wont fire any ideas?
I bought what was a pre jetted 30mm delly from you a bit back for ts1 200 with a jl 3 ,it suffered from fuel starve so i boxed it and on the shelf for another time ,redoing the scoot and engine and watching your vids and using a 300 float valve ,checked mine its a 200 so thats the issue ,do you still keep any 300s
Hi, just watched your video, very informative. I have a Lambretta with a GT186 kit and expansion pipe. It runs great is pretty lively but suffers from poor running and 4 stroking at town speeds up to about 1/8 throttle. This is driving me mad as most of my trips are on 30, 40mph roads. It has a 30mm PHBH with AV268, 40 slide, 70 choke tube, 50 pilot , X7 needle 2nd clip from top. It was running an open carb but I have since fitted a BGM hose with foam filter, which has made no noticeable difference. How can I get rid of the low speed 4 stroke, or do you think changing to your jetting would solve the issue? Thanks
Regards Gary
Hi Dan great video mate , I’m trying to get my 24mm PHBL dialled in on my Model D GT185 , miller pipe , would the basic settings be good starting place for that ? Still recommend the AV266 with the x13 as I have AQ266 fitted with a D36 , any help greatly relieved and appreciate video is one yr old , thanks 👍🏻
Fantastic Video , im struggling with my PHBL25 , I got a 60 pilot , 102 jet , 2nd clip 0n D26 needle with a 40 Slider , it bogs with flat spots between 1/4 and 3/4 throttle , would you please have any reccomendations , its on a Standard GS 150 with a Sip sports exhaust , regards Del
Hi Dan looking for some advice. Running a mugello 198 with DJ exhaust and a 28mm dellorto. Looking for some info on carb settings. It is running but really boggy like the chokes out permanently and spits out an excessive amount of fuel. Any advice would be greatly appreciated. many thanks Allan
Videos are very helpful Dan.
I'm struggling to set up my 25mm open mouth phbl on gt200 cylinder kit with bgm clubman. Do you have a jetting recommendation?
Email sent
Hi dan brilliant video .
Quick question I'm running agt240 with a 30mm dellorto I've got pilot 55
Av268
X13 needle first clip
Main 145
40 slide but it's bogging down if I get the revs up it pull through but I'm running in so don't won't to thrash it .
I tried second clip but it was worse.
Any help would be good cheers
Hi,ive got a scootopia 185 kit on a 26mm dell orto with short manifold from MB and stock air filter box does your jetting advise remain the same?I use a AF clubman exhaust.ta
Hi what would you recommend jetting wise useing a new casa x1 200 sport kit for the small block a jet 200 gearbox a jl3 exhaust and 28 delorto?
Hi Dan. Great vid thanks. Would you say those jet ball park figures are applicable to the 28? I’m running a Gori gp on a case welded/ported m210. Cheers!! :)
Yup, 28/30 are closely matched, so maybe only a small decrease in jet sizes needed.
Great info Thank you. Have you got any advice for a rs125 on a bhph28 62 pilot 122 main 50 slide (I own 40 too) x25 needle (I also own x2) flat top piston 1mm squish, full arrow (Gianelli exhaust). Struggling to make it run smooth in mid range. Not sure if its the fual im using at this point octane 99? piston looks coked up
Hi Dan
I am running a bgm 225 with a 48mm clubman exhaust and is very jerky on acceleration with a 120 main jet, tested with the 105 and serm to work fine, would this be ok or would I need to put a larger main jet in?
Thanks for this great video.. I have a 2009 Yamaha zuma 50cc (two stroke) .. Which Dellorto carb do you recommend that my Zuma. I hear that I only need a 17.5mm. Thank you very much.
I would have to concede that the Yamaha Zuma is not my area of expertise.
Hi Dan, very helpful information. I have a dellorto phbh 26, what base setting would you recommend for a vespa px engine mallosi 166 kit with mazzuchelli long stroke race crank and sip road exhaust.
Thanks 😊
As per the video. Did you checkout part 3?
Hello Dan, great explanations thank you. I was wondering, I have a GP200 with an RT225 kit, taffspeed expansion and a 30mm dellorto phbh. Initially I had a 55 pilot, x13 (2nd clip), 120 main and an av268 and it just really didn't want to idle when hot and the idle screw didn't really have an effect. I have used your other vid and changed the av268 to an av264 and it does sound better at tick over (plus the idle screw is effective which is a bonus lol) but it's very boggy when pulling away.
Can you offer any advice please?
Your main jet looks a little small, I’d try a 122/125.
For the bottom end/tickover - are you running an air filter? What slide is fitted? How many turns out on the mixture screw?
Hi Dan, new subscriber, nice video. Can you recommend where to purchase these items ?
Gonna have another go at setting up a 26mm phh .
cheers
David Blagden unfortunately I can’t recommend a retailer as I bought trade. But I’d suggest you do a google search and buy from a scooter dealer, some even offer a pre-jetting (ballpark) service.
Hi Dan...great video. Would you start as high on main on a 26 phbh with a mildly tuned SR185 through a 42mm clubman (open mouth)?
Start being the operative word. My opinion is go high and work backwards to lean off as required. Better to be too rich than too lean 👍
Dan, jet 200 with stock top end, a 25mm phbl and a tar touring pipe. Where do you see the jet and setup should be?
Dan, thanks for this, do you have a list of recommended dyno centres, I live in Surrey.
I don’t specifically recommend a particular Dyno centre, but do suggest it’s ‘classic scooter specific’. 👍
Sup from the states.
I’m building a GT200 kit with a phbh 28mm
What would you a start for jetting?
I have a vr-one ported and tuned the crap out of it. But it is an onorthodox setup.
I run a Malossi Sport 2016 188/122 65%
1.12mm squish 21cc Vhead
Tameni 60 rotary crank
Polini box
Static 18° 1850gr
Blowback everywhere, bad fuel economy very very bad non existend fuel economy. Backfire detos
I'm going to finish part 1 then part 2, take more notes as I watch part 3 again, go to my shed and try the recommended settings.
Untill now I've done everything wrong and I'll keep you posted. I'm stoked and I have all the parts...
Great informative video ,Thanks
So here is where I'm at I have a LML engine on my Vespa Sprint with 190cc Pinasco Cylinder 60mm crank, Mukuni Vacuum fuel pump and a Dellorto 9364 VHST 28mm carb. At present I am on the 2nd of 4 notches for the needle but the graduation for acceleration is very poor as in , its either on or off, not great for touring. My thinking at the time was I need to select a different needle (D Types) which I am now trying to understand which is the import measure to get this more graduated acceleration, is it (the shank diameter 2.52mm D47 needle, the diameter tip 1.4mm or the cone length 26mm?) then as you say in your video if a lean needle how do I determine which atomiser is considered lean or rich and is my pilot 55??? I will open the carb to see what needle I have but am unsure of what stock pilot and main jetting values are out of the box. Any direction received would be great (or video). Peter (Melbourne)
Hi Dan
Great videos and thanks for putting them on. I have a 25mm phbl dellorto and was going to use it on a rt195 with a scootopia clubman exhaust and no filter. Would the jetting starting point be the same as the phbh or will it be somewhere totally different. What would be a ball park figure please
Thanks Dan and keep up the good work
Gus
The PHBH and PHBL are totally different carbs, you'll still use a 55 pilot to start, but the main jet will be more like a 102 to start testing with. Use the Atomiser and needle it comes with, start on the 2nd clip, and work from there with plug chops, etc.
Wow thanks for the fast response that’s brilliant. Would it sill be advisable to change the float needle to a 300 as well
Cheers
Gus
@@MrGusmcc yes
Hi Dan
Great vids for a novice like me, just a question i have a 28mm phbh carb fitted to my px via a reed valve set up, i recently took off the air filter but didnt alter the jetting now when at full throttle for a while as i shut the throttle down the engine continues to rev at what appears to be the same rate. I try to pull the clutch in and out and then try to blip the throttle but it seems unresponsive to the point the engine is screaming, i eventually switched the ignition off and let the scooter cut out . It could be the throttle cable or slide sticking but they seem ok when i check them out could it be any thing else before i start replacing the throttle cable etc .
Bri
It’s running lean. You can’t just take a filter off and not adjust. Take the carb apart and tell me what jets are fitted (pilot, main, atomiser, needle, clip, slide, float valve) and I will make some suggestions.
hi Dan great video, would you know ball park settings for a ts1 225 on a vhsh 30?
john haimes I’m going to dig out my old Dyno files as getting a lot of specific jetting requests.
Hi dan I've hot a gp 200 running f a standard 22mm carb can you reccomend the best jetting and performance please as IRS bogging out in fourth gear, any help please
Craig Minister best jetting for a standard engine, is standard jetting. The entire setup is available in most tuning books or on any google search. 👍
Do you have any knowlade on e50 engines, 70 cc bor kit and 21 mm dellorto carbs on them ? What should I order for sizes I have both the racing vaient and regular one I need help as my air/fuel screw is only about a thir of the way out from closed. It's not smoking really bad anymore ? Should I drop the needle down one and see what happens ? Or put it up a clip
Sorry bud, not my area of expertise.
Hi Dan ,have you ever done any back to back dyno runs comparing a Dellorto PHBH to a same size VHSH and what bhp gains were there ?
Mark John yes, it does give gains. It has a sharper throttle response on the road and small gains on peak power. But the point being, is that you can get that with a PHBH or even a smaller 27mm carb, if you tube your cylinder and exhaust first.😀👍
Hi Dan - great channel - I'm enjoying the videos 👍 Quick question, I'm looking at fuel flow rate to my phbh 30mm carb. I have a newish fast flow fuel tap (from Scootopia) but when I timed the minute's worth of fuel flow (holding the container same height as the carb), I only got 16 fluid ounces rather than 20 which is your quoted ideal (in fact strangely 16 fl oz was with the tap in the reserve position, in the normal position I ran it in I only got 14fl oz.) If we go with the 16 fl oz per minute (cos I'm happy to run in reserve position as I check fuel regularly on rides), any idea if this is worryingly low or would you consider that within acceptable range (80%) of the desired 20 fl oz? I don't want to start looking at potential carb issues if there's not enough fuel going in in the first place. Numpty question, but attaching the carb doesn't encourage (have a pull effect) on the fuel coming through the fast flow tap when I open the throttle fully does it? I guess I'm wondering if the 16 fl oz/minute on gravity flow increases if there's a carb guzzling it at the other end! Cheers in advance.
To answer the part about the carb, no... it doesn’t create extra flow. In fact, another way of measuring fuel flow is to leave the fuel pipe attached to the carb, undo the float bowl and test flow rate through the pipe AND carb.
In terms of the 14/16 fl/oz... it’s all about how much fuel the engine commands, header pressure, flow etc. So maybe a standard 200cc with 22mm carb and clubman would be ok with that level, but perhaps an RB250 with race expansion and 38mm carb would not. So depending on your overall setup and the fuel demands of that engine, I might be inclined to try a couple of different taps and see which flows best 👍
@@drunkmunkey6969 Thanks Dan much appreciated. It's an LiS 150 but with a 200cc engine and a PM exhaust. Gonna take your advice and run without foam filter/tune accordingly and do some plug chops. All jetting is as your recommendation except the 264 which I'll swap out for a 266. Hopefully that will stop the bogging when I open up the throttle/drive it hard uphill 😁👍
Hi mate.Great videos.Can I just ask.I have a pinasco 177 with a sterling pipe and a 30mm phbh.The settings are 55 pilot 40 slide x2 needle av262 and 125 main.Will these settings be ok as a starting point (not fited it yet and am a bit of a novice)Thanks
As per the video - a bigger atomiser will be required AV264/266 probably
Hi, a friend of mine is having problems with his 1966 Lambretta Li 150 Special. It has a 175cc top end up grade. He is using a Dellorto PHBH 30 carb with 128 main, 100 pilot, 250 Tap, AV262 Att, 30 slide and x7 needle. He claims it was run sweet before throttle cable broke and while he replaced said cable stripped carb to clean and replaced rubbers etc. The bike will not now run unless on full choke and when choke is turned off, it bogs down and dies and will not run. To start again needs full choke and a squirt easy start. The plug is wet and black. Should I follow your basic settings, as you don’t seem to mention a 150/175 in any of your various tuning descriptions? Thanks in advance for help.
Hi Dan, I have a 28 mil PHBH on mine. Do you recommend the same jets etc as the 30 or should I shift the numbers accordingly? And if so, by what amount?
Start off with the same jets and see how it feels, you may end up with a slightly leaner setting in the end, but always better to start rich and lean off gradually.
Hi Dan, new subscriber, what a knowledgeable chap you are, great vid, trying to set up my PHBH30 BS as per your recommendations, however the X13 I purchased from SIP has a larger diameter than the original so will not go into its location or even fit through the float, am I missing a trick here are there different sizes of needles, would be grateful for you help and advice, regards Mark
Hi Mark, do you mean the needle won’t fit through the slide, rather than the float? But to answer the question, an X13 needle should be identical in EVERY way, so there is clearly something wrong here: Feel free to email me images of the components if you want further assistance.
@@drunkmunkey6969 Hi Dan thanks for getting back to me, I'm with you now, I'm doing this for a friend and have only been supplied with the body of the carb, so there's where my confusion stems from, 😊 cheers Mark
Hi dan, great vid! I was thinking of swapping my phbh 28 for a Polini flat slide 30 to go on my 187 px. Maybe I’ll reconsider! Quick question on the needle/atomiser combos, you mention using a richer needle such as x2 with the leaner atomiser av264 what difference would this make if any against using an av268 on the leaner x7 or the av266 and x13 which I currently use. Cheers
Your 187PX wont command enough fuel to warrant an AV268, so stick with the AV266 on that application.
Ok thanks, I’m trying to get rid of a lot of spluttering at approx 1/3 throttle but lean at 2/3 - 3/4 with 55, x13 av266 128
whats a easy (inexpensive way) to make a Li 150 to get a bit more power for every day use? or should i leave it standard, im not wanting to make it into a fast scooter bcas i cant afford to do that.
lee guy if the scooter is otherwise completely standard and still using original exhaust, start with an exhaust upgrade. If that’s already been done, send your cylinder to a reputable tuner for a mild touring tube. Simple stuff, easy gains 👍
James
I have a Dellorto PHBH 28, what would be the best air filter for this carb??
Depends on the application. Vespa, Lambretta, which kit, what pipe etc. But personally, as per my advice in part 2, I don’t use air filters, I run carbs open.
hi i have a px210 malossi with a phbh 28mm carb a sip expansion pipe,and it drinks fuel like its going out of fashion,,i2m thinking of putting my sip 2 exhaust back on it as i think the expansion pipe is probably to much for it,can you point me in the right direction of set up please,,,many thanks
Here you go: ua-cam.com/video/Xc31PqvPRJg/v-deo.html
Hi Dan!
Thanks for the great videos!
I am jetting my lambretta jet Rt225 with Casa Performance Power flow filter, v4 bgm clubman, Delly phbh 28 and electronic ignition.
do you think I am going in the right direction with the next set up?
40 Slide
x7 Needle (second pin from the top)
Av 266
120 main
50 idle
250 float
I ´d like to start from that and fine jetting afterwards but I am a bit lost tbh!
Thanks for you help mate
Marcos
I think you are pretty close. I’d go up to a 52 pilot though, and a 122 main, and do plug chops from there. 👍
The Scooter Factory cheers man!! Very helpful!! ❤️
Hi Dan, great video! Had a couple related questions; a) would you recommend those jets with a filter fitted ( breathsweet / proporting type ) ? b) which float needle valve do you recommend? 300, 350 or ? and c) how important is setting the float height by bending the metal tag? many thanks! R
Roger Shortt i always ran open mouth, no filter. 300 needle jet. Never once had to reset the float height tabs on a Dellorto, only ever has to do that on OKO carbs. Hope that helps 👍
@@drunkmunkey6969 awesome - much appreciated
What would be a good starting point for my rapids 225
Hey Dan - great video. I found it as I’ve just come into a PHBH 26 SD. I was hoping to pop it on my Eibar 150 Special which is standard apart from a clubman exhaust.
What setup would you recommend for me?
Many thanks in advance.
Hi Dan, I'm struggling to setup a 30mm VHSA on an RB22 with Franspeed expansion pipe - do you have a spec for that carb or would the 30 PHBH be ok as a replacement - if so do you have a spec for that? many thanks
PHBH 30 would work fine on that. What's your current jetting spec on the VHSA and what problems are you having?
@@drunkmunkey6969 Hi Dan,
I'll find out exactly tomorrow as it's on my mate's RB. I know it's very rich and boggy and power doesn't kick in until about 2/3 in the rev range. We lowered the needle from middle to top clip posn and dropped main from 155 to 135 (it's all I had) and there was significant improvement but wary of going flat out as 135 could be to lean. Also have seen a mod which needs done to this carb due to fuel starvation.
Dan, is a 45 slide still ok in my 30mm PHBH carb???
Hello Dan, I'm after some information if you would be so kind. 172 Malossi on a T5 motor. 26 PHBH carb, I'm just wanting a basic touring tune to be honest. It has a Sip Road pipe. So you would recommend a 55 pilot, AV 266, 40 Slide, X13 on the second clip, what main jet would you recommend ...I'm not after something silly speed but a good all rounder ..traffic, a few long open roads etc but mostly for general town and some open roads riding. Keep up the good work too !
Start with a 128 and then all components need checking with 1/8 1/4 1/2 3/4 and full throttle plug chops. The 55/AV266/X13/128 is just a starting point to develop from…
@@drunkmunkey6969 thanks Dan, it's appreciated!
Rt225 60/110 30mm dellorto what set up would you suggest
Hi Dan, these information video are great for me, as I live in Belfast, and no real scooter shops what so ever.
I've got a servetta lince 200 with 30mm phbh and JL roadpipe
I've watched videos and can you confirm that this is appropriate what I should be using? 55 pilot jet, atomizer AV266, 40 slide, X13 needle, main jet 125-128, float valve jet 300.
Really interesting videos for my particular circumstances.
Many thanks. Stephen Harmon..
Sounds like a very good starting point, with the needle on 2nd clip. From there, road test and plug chop to refine and tweak as required.
@@drunkmunkey6969 hi Dan, thanks for the reply, in process of ordering jets etc from Sip.
. There are certain variants, like 5mm 6mm,
I guess my question would be for the Dell'orto phbh 30mm which variant size? Sorry if this is a stupid question.
Thanks again. Stephen Harmon.
onetootie 5mm is for pilot jet size, 6mm is for main jet size 👍
Hi I have just built a li 125 🙄🙄 anyway I have put on it a 198 kit, this is a cheap kit(please dont judge, budget)this is as near standard 200 as it can be ,so I have a phbh 28mm and a racing exhaust clubsport from chiselspeed, the jets are as I can remember av268, pilot I cant remember, x7 needle, 30slide 2nd clip I think ,98 main jet, 300 needle valve, what do I need to change as a good starting point ,thank you
First I would ask... how is it performing, and what are your plug chops showing you? Second I would ask, where did you get these starting jets from... was it your own guesswork, or proper advice? Third I would ask... have you asked Chiselspeed what they would recommend for this exhaust and setup as a starting point? But in the absence of all that info, I would suggest that you need to go up on the main (around 120) and down on the atomiser (try an AV266). I'd also suggest you find out what the pilot jet is, and decide if it compliments the relatively rich 30 slide or not. Hope that helps
Hi Dan great vids . Running a Rapido classic LTH reed with Xbox clubman main139 atomiser 266 x7 needle 2nd clip 40 slide which pinks at 3/4 throttle but ceases as it revs on . Any ideas runs fine apart from this ?
Try X13 needle. Also check ignition timing and compression ratio.
@@drunkmunkey6969 will do thanks Dan
Hi, which carburetor would you use? A Polini PWK 30 or a PHBH 30, when it comes to maximum power and a „low“ petrol consumption? Good Video👍🏻
Dellorto every time
How about the PHBH 28? What recommendations compared to PHBH 30?
It depends on the application, Part 2 of the video (coming shortly) will hopefully fill in the gaps, but a 28 is usually only marginally leaner..
I was thinking when it comes to Atomiser and needle for the 28, AV266 and X13?
I have a 28mm phbh on my polini 177 vespa px, what jet do u recommend? 125??
Also I have a av264 x2 needle clip is that alright?
Best starting point is as stated in video. 55p, X13 (2nd), AV266, 300tap, 40 slide. But, as you have the AV264 and X2 already, they are a good combination too, so work with those first and see how you get on. Start with a 125 main, do plug chops from there on all throttle positions, adjust as you go 👍
@@drunkmunkey6969 cheers buddy got a 125 in atm and its running too rich so I'll drop it down to a 122 in a weeks time when the scoot is properly finished
Make sure you do plug chops at set throttle positions, to be sure you are leaning off the right jet 👍
@@drunkmunkey6969 yh yh I know man taking it to chiselspeed for it to be dynoed bud so I won't have to worry about it
Hi any staring point for implants 198 with 30 del PHBH Taffspeed pipe
55 pilot 128 mail
Implants?
Sorry Imola 198
Hi Dan, struggling with the carb set up on my Jet200. I’m running a MB Stage 5 225 Barrel, 70.4mm Piston, 107/60 Crank, Sterling Exhaust, 28 PHBH
Jetting:
Main 115
Choke 60
Pilot 55
Needle X13
Atomiser Av264
Slide 45
Takes a good 20-30 kicks to eventually start and then will only start on full throttle
20-30 kicks? When was the last time you checked the piston clearance in the bore and the ring gap? Once that is sorted, a 70 choke and a 125 main will be more appropriate, as would a 40 slide. 👍
@@drunkmunkey6969 about 20 miles ago, been struggling with it since day 1. MB had advised the carb netting’s above
@@connorl7660 have you visually checked the brass plunger for the choke, by looking through the small hole at the front/left of the carb, to make sure it opens and closes properly and fully?
@@drunkmunkey6969 Yes, have even tried using a flip choke so I know that it is fully engaging
@@connorl7660 and once running, does it warm up and ride ok?
Hello Dan, thanks for the video, the whole internet is swamped with advise from wanabe experts, nice to hear from someone who knows stuff & understands Lambrettas. I have a Mugello 225 with an MB/BGM V3 big box pipe & a Delly 26 PHBH it's up on the lift as I type & is getting a long overdue rebuild. I want smooth a running scoot with lowdown power that'll cruise at 55/60, not fussed about balls out speed, I like a flexible motor, you know, down to 20 in top & pull off cleanly all the way to flat out without the awful gah gag gag that so many tuned bike do. What jetting do you suggest for my set up. Oh! it was good, & as I described above, but it dropped right off, before I run it again I would like an opinion. thanks again for the vid. John.
John Wilcox is it running a filter or open mouth? Who set it up before and what jets was it running? Let me know and I’ll take a look 👍
@@drunkmunkey6969 Hello Dan, thanks for the reply, I run with a foam filter (un oiled) I set it up myself using CamLam's jetting chart. So set up at the moment is :-
Mugello 225 v4. BGM/MB V3 big box pipe. Foam Filter (un oiled). White Polly Float. Red Tip float needle. Float needle seat 300. Slide 45. needle X4 3rd clip from top. Atomiser AV268. Main Jet 112. Pilot 50. Choke 50. Fuel screw 1.5 turns out .
John Wilcox John Wilcox ok, what CamLam do there is go in with a big atomiser, but run leaner settings on everything else to compensate. Seeing as you have all their settings in already, try to work with what you have. The thing which is interesting in your first post, is that you said it was actually ok to begin with.... but then went off the boil towards the end. This might indicate rich running, and eventually your filter clogged up and your plug burned out. Clean up (or replace) the filter, pop in a new plug, and adjust the needle to 2nd clip. Do some plug chops, focus firstly on 1/4 and 1/2 throttle, and that should help. If too lean, you can use a half clip spacer under the needle to get a 2.5 clip setting. 👍
@@drunkmunkey6969 Thanks for your quick reply, I'll see what I can do, on checking the plug I think I have been burning gear oil via a slightly leaking seal, I got only 450ml of oil out when draining down overnight. Thanks again. John.
John Wilcox you’d know if you were burning oil, you get oil splatters and white smoke from the exhaust. You always get slightly less when draining, as quite a bit stays ‘wet’ on the gearbox surfaces.
30mm PHBH on a RT 225 with BGM Big box? Help!!!!
Watch this: ua-cam.com/video/Xc31PqvPRJg/v-deo.html
I think you lost most people and scared the rest to death. I decided never to do this on carbs it's nightmare so many people with different levels of understanding and can get just to complicated for most . But good effort well done .....👍prepare you self for a million questions ❤
Thanks bud... i know what you mean. This video will either turn out to be a really good idea, or a really bad idea... lol
Your prediction was correct, I seem to have created more questions than I did answers... part 2 will hopefully fill in the gaps...lol.
@@drunkmunkey6969 you opened Pandora's box best to close it and leave it well alone ....
Omg this is a lot of important Text and Stil basic mistakes 🤔😐😶 a lot of oldschool "knowledge"
Talking about setting a carb and not about proper fuel supply is not even A bad joke, its irresponsible and dangerous. It might harm/hurt people 👎
Why would you do that? You cant set a carb with fuel starvation, so thats the point where you start talking about setting carbs.
Perhaps the correct AS would also work, with enough fuel 😉😉
Missing info:
0) fuel tap!
1) fuel pump needed to be for sure on the safe side = having enoigh fuel not always close to fuel starvation.
2) needle ventile is to small
300 is needed
You can not set a carb when fuel is not provided properly.
Wrong info
1) slide closing not possible, throttling needed. Simply wrong.
Only if your carb is not set correctly and/or you have fuel supply troubles
Even a correct set SI carb can of course take slide closing 😉
Its just a myth cause people dont set the carbs right (and/or do not ensure fuel supply)
2) AV is the WRONG atomizer. it causes heavily 4stroking in low rev, which can not solved with any jetting. It totally cuts the phbh potential. AS is the correct one. It is NOT too lean (perhaps fuel supply troubles hits in 😉😉) if set well and enough fuel is provided
And dont u wanna explain things a bit with some hardware instead of only hands? a prettty & boobed chick ok 😜, but a dude...?! People might not get all info and fall asleep 😄😉
the correct order:
1) proper fuel tap
2) mostly fuel pump mounted
3) correct size fuel needle ventile
4) THEN setting the carb
4 without 1+2+3 will never work 😉
it may, cruising from A to B but someday a situation comes where the still wrong setting will hit in.
ALWAYS be on the SAFE side. Use the best tyres, ensure more than enough fuel, use proper shocks etc. thats at least my approach.
greetz
FMP
mista FreakMoPed ... please leave me some time for video part 2 😂😂👍 There is lots more to come... This video was just to give people a starting point on jetting a Delly carb for use on a Vespa or Lambretta... not how to setup the entire scooter. 😂 We disagree strongly on some points, fuel pump is NOT necessary, AV atomiser IS the correct one (with X7/X13/X2 needles i discuss). But we agree 300 tap is required. I will be discussing that when I give specific jet ranges for certain setups in a coming video. Sorry I couldn’t provide a booby lady for your attention, but I seem to have retained your focus regardless.... 😂😂👍🍻