How To Service The Rotax Senior Max Power Valve - POWER REPUBLIC
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- Опубліковано 1 жов 2024
- In this week's video, we take you through the steps to service the Power Valve on your Rotax Senior Max engine.
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Great trick with the zip ties. Putting that spring on with your fingers or a couple of screwdrivers is a pain in the ass.
Yeah I know, a friend of mine Kenny B showed me years ago. So a huge shout out to Kenny from the House of Power
Your videos are much appreciated!👍👍💪💪
I appreciate that!
i was just wondering if the evo measurement was different good to know
Can you damage any of the power valve internals by over tightening the red adjuster? I found that ours was turned full tight clockwise
Good call with the zip ties / cable ties .... another great video ... heaps of relevant knowledge presented in a professional manner ... Well done Derek !
Hi Craig, thanks for the positive vibes!!
@@PowerRepublic help me out pleasw
That cable tie tip was excellent.
Glad it was helpful!
Great vids , thanks , why didn't you re measure the PV length after you reassembled it . ?
Great vid Derek, I find these all very useful particularly as I’m relatively new.
A quick clarification, the lube/oil you used, what type is it? Presume just synthetic engine oil?
Hi Tom, I use synthetic oils only in Rotax engines to help with the engines A/F ratio tuning. For assembly of engine parts, I use Rock Oil Castor Kart 100 which is the oil I use to run in the engines on the engine dyno as well. But I don't think it would matter if you used any type of 2 stroke oil for assembly.
Power Republic legend - thanks for clarifying!
@@PowerRepublic alright derek I have rotax 122 in my aprilia rs 125 fitted with new old rave2 power valve and its jammed when fitted I have filled blade down and it still sticks but when taken out it works fine any ideas definitely the blade please help Paul uk
@@trianedtog0417 maybe check that it moves freely with the hoses disconnected? then if its jamming the plumbing is back to front on the PV Rave valve
@@PowerRepublic alright Derek me again I take my power valve out and it works fine I have just bought new blade oring gasket and blade and its sick in cylinder can you give me any advice for the last time I have bought new springs and now I am going to remove the casting marks off the blade
Just abit of advice really, my bike uses a rotax 122 engine and they have as standard a solenoid and cable setup however they are expensive to replace and go wrong more than they work. I was looking at going down this route is it just as simple as drill the cylinder on the exhaust outlet and fit a rave valve as in the video. Any help would be appreciated
Great video. The exhaust pipe of my tony kart is leaking oil in between exhaust pipe and the block of the engine and when I run the kart to a high rpm then the oil leaks through the end of the exhaust pipe splashing all the burned oil everywhere. What's the handling for this? the engine smokes a lot, is this normal for a Rotax ? Thank you.
Hey BES, yeah it does happen. but maybe change the exhaust springs and gasket on the exhaust socket to stop the leaks there. if the engine smokes a lot then maybe you have to much oil or the AF ration is too rich? how much oil do you put in the fuel?
@@PowerRepublic Hi mate, thanks for replying. I'll do that to stop the leaks and let you know. The ratio I do is with a measuring cup that shows 32 I believe is milliliters per gallon of gas. I'll test it with a little bit of less racing oil. Thank you. - Carlos
@@businessexpansionstrategie4015 anytime bro 👍
Hi. Great videos, new to rotax, could you please explain orientation of power valve blade, as in video, longer part uppermost? Thanks very much. Cheers
hey gas, the long side is the top and the short side is the bottom
My kart starting and idling fine but when driving backfiring and power valve not kicking in any help please ????
electrical. check earth, double check earth. then try the start buttons/switches. then coil. last thing is probably the crank angle sensor
Hi there so just a quick question about the measurement on the non evo power valve measurement mine is at about 72.8 so if i just slacken off the stud to get 73.5 is that just gonna rattle around loose? or should i buy a few valves to find the right one? Thanks.
Hey Sam, they can rattle around with out any problems, other times I have seen them come loose. you could try a touch of loctite. otherwise get a new stud and try that. sometime too the piston can get damaged from over tightening. if that is the case then you could replace that too.
Excellent video Derek, the old ones are just as tricky to get aligned right for proper movement. Do you recall on the old ones if the rotax length of 73.5mm gave the best performance or if running it closer to 75 was better?
Hi Chris, set them at 73.5 as recommended and send it !!!! IMO
Can you actually adjust the red button on the evo powervalve cover? Does it actually do anything?
Darrin Stuckwisch you can. I move to flush position with the black housing and leave it. It’s only really subtle adjustment of the spring pressure. The ‘Rave’ Valve of the new EVO Rotax system is amazingly good and the power valve control. Set the red disc flush and just ‘sent it’ 👊🏿
I was also wondering, can I updated my non evo to the evo setup, but I still have the old style exhaust socket I was wondering if I go to the new donut style will I be able to use my non evo pipe? Or will or not fit? Also is there any power gain with the evo exhaust pipe? Btw your videos have gave me so much help as this was my first year with a rotax
Darrin Stuckwisch thanks for the positive vibes. I would buy the EVO exhaust for sure. All the EVO parts are an improvement if you can afford them. The old style red dial on the PV did work somewhat, however there was other variables like throttle position, gearing and AF ratio that effected the operation of the PV on slow corners.
Power Republic
I have the evo powervalve setup with the electronics and carb. I just still have the old pipe setup. Though
@@darrinstuckwisch4903 get the new pipe for sure. the non EVO pipe was a weak link in the sense that it cracks. EVO pipe is a no brainer for me.
Hi derek is it possibly to tune the evo power valve for more low/high end power?
the EVO power valve is normally solid. have you checked your barrel height ? maybe if it could be lowered to the lowest squish you could get some more bottom end power out of your engine
So the difference between senior and junior is that in junior there isnt this valve right ? I just bought a 2nd hand rotax , and it has this power valve in it
yeah the senior max has the power valve and so does the DD2
Didn’t see the gasket go on between the barrel and the power valve assembly.
Sneaky behind the shot camera work busted. you have an eagle eye @lizseeliger and glad you are paying attention
Is it the same with the non evo rotax
more or less, same fundamentals
Are the PV gaskets the same for an Evo and Pre Evo PV? I have a load of gaskets from my pre evo PV so can I use those to re-assemble?
yeah mate, same dimensions but I think they have changed colour and material from green to red.
They are pain in the arse Rotax would be best advised just to forget them!
Hi. I'm looking for a video/article on how to use the power valve on the pre-evo. I.e., when you turn it in as opposed to turning it out, how does this effect power, speed, etc.? Thanks!
Hey Michael. They don’t really make more power per se. And they only effect the engine performance below 7500rpm +\- 1000rpm. Is you PV bellows new? If so set the knob about half way open. If they are old, most likely they are lazy so screw the knob all the way into zero. Hope that helps
@@PowerRepublic Thanks!
Hi Derek do you ever adjust the new power valves
you can if they need, but in the rotax rules if you are racing you had better leave it with al the flashings on it.
Thanks mate, mine was stuck open and this was the was the fix I needed.
Perfect. Thanks heaps for tuning in and sharing the videos
Our power valve gasket doesn't have a hole in it at the bottom is the right?
won't matter on the new EVO PV. only need the hole for the original PV so the exhaust gas/pressure could fill the bellows
Bonjours
Peut on regler valve rotax max evo 2023
Sportivement
Hi Des, can you advise on the red adjuster, I read in the comments you simply set it flush to the top of the black cap? Also I'm struggling to find a tool to adjust or turn the dial, any tips? Thanks Colin
yeah Col, I do set them flat. use a set of expanding circlip pliers
@@PowerRepublic thanks Des, great tip
@@PowerRepublic stupid question from a rookie. What exactly does the red adjuster do? Determine at what rpm it opens.?
@charliepedersen1900 the more you turn the red adjuster in, the greater the pressure on the valve, so the higher the RPM it needs to open the valve
Tem cara BSB sabe fazer o mal com excelência, ensine se te tamanha excelência use pela verdade
Apakah karet dan plastik itu tidak terbakar atau meleleh?
Hi buddy. Thanks for the video, as always very informative.
When you put the power valve back on the kart and you nipped the 10mm plastic cover thing how do you know its still exactly 81.6mm?
Hey Steve. Thanks for tuning in. I pull it out and measure it after
@@PowerRepublic Thanks for replying. You mean take the whole power valve off and measure it after?
I can't think of any other way to measure the 81.6mm without taking it all off, then you'd have to aline, would I be better off just building the valve off the engine?
Hope this make sense
@@stephenkhan80 yeah that makes sense. that's is probably a better idea anyways. go for it an let me know how it goes
@@PowerRepublic Thanks buddy
@@PowerRepublic Sorry 1 more thing (on this🤣). Mine has a gasket, did you not put one on for video purposes? Or will a bit of assembly lube be OK? Thank you.
Thanks Des, Another brilliant video.
Thanks mate
@@PowerRepublic my power valve keep sticking its in a rs125 engine works fine out cylinder but soon asi fitted it it sticks
@@trianedtog0417 maybe the housing is warped or the PV blades orientation to the PV housing is out enough to make it bind up when you tighten the housing down?
@@PowerRepublic bought new blade everything my rave2 is for rs125 rotax122 same engine nearly just setting up my carb my cylinder is ported my jets are slow 36idle main jet 160 premix 50to1 castrol A747 and morul 720 to make it 32 to 1 can you email me at apriliarider0@gmail.com for some set up we just got 40 bhp out a rotax max with converted italkit 140 jollymoto115 exhaust for engine check pjme website out for performance parts
@@PowerRepublic this channel got an Instagram account please post link cause this channel should be bigger than this best on here I got Instagram page with just rotax parts and videos on it I can get your channel going big watch you need to get rotax122 engine and do rebuilds these young lads pay thousands for rebuilds and oil carb products were you from my friends
Se tivesse um brasileiro igual vc
obrigado
I installed my new bellow but it’s not quite in the “middle”, if you push it out it’ll go back in, but it’s all the way in, you can’t push it further in. I ran it anyways on the stand just to make sure that wasn’t how it was supposed to be and yeah it wasn’t, it wouldn’t rev up past a certain rpm. Any recommendations as to what I could do?
EVO power valve my friend?
Power Republic No, pre evo. The bellow was advertised for the evo but the seller said it would work for either one
@@GamerBoyzProduction yeah the bellows are universal. my guess is the orientation of the blade to the housing is off a little and the blade is getting stuck in the slot of the barrel.
Power Republic Huh I guess I’ll check my alignment thank you for the help I’ll keep you updated!
Окей
Thanks! Super good video - again :-)
Thanks again!
with this, can you convert a pre Evo junior to a senior?
no, not without the cylinder upgrade
@@PowerRepublic is there any guides online of how to do this upgrade? I can't find much, it's it worth it?
@@MrPilot_moon www.rotax.com.au/junior-max.html
@@MrPilot_moon probably easier to sell your old one and buy a new Snr Max
@@PowerRepublic thanks 😁 I thought that..