Airbox modification increases engine performance and fuel economy
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- Опубліковано 6 чер 2024
- Resolving a dusting problem with the old Africa Twin's air box configuration, I've unlocked a new level of performance and fuel economy for the Warhorse! This legendary 1992 V-Twin carbureted engine now has more torque and horsepower thanks to a better breathing air-filter system, now also less prone to getting blocked with dust.
In this video I'll explain the benefit of a positive pressure air box, and the effect it has on the air intake vacuum pressure and fuel mixture.
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great airbox tip. Keen to try positive pressure on my 890AR somehow. In your riding experience in Australia, generally speaking, do you reckon most filters get dusty from following others or dust being churned up from your own back tyre?
If you're bombing motos on a mx bike by yourself, the filters can get dirty just from all the dirt blasting around, railing ruts and turning back on yourself in tight corners.
Generally speaking though, if you're riding solo on flat dusty roads (adventure style) then your filter should not be dusting itself. If it is, the airbox design is seriously flawed - just like the Warhorse.
I didn't do this mod for a power increase, I did it so the airbox can access clean air - not buffeting dusty air coming off the back wheel.
The added boost in power is simply a virtue of the filter now drawing a better flow of cleaner air.
It's that simple.
Do yourself a favour and get the Rottweiler air box. 10hp increase, and way better protection for the motor. It feels like taking the gag of a fighting dog, she can finally bark and run properly!!
@@hansenallan84 theyre developing a bad rep in australia. They flex too much under load and have poor manufacturing so are letting dust in and dusting motors and voiding warranties
@@k_plax Really! I didn't know that! Is there anywhere I can read about this?
Best thing you can do on the 890AR is to fit the Powerparts prefilter and fit the plugs for the 2 drain holes, crazy how much dust gets sucked through those 2 drain holes, from the back wheel. I also run the funnel web air filter, dust actually gets past the temperature paper filter, very dusty here in South Africa.
It’s so funny when you are ripping it up and my 2 year old points at the tv and says “dada..dada”. Then I just look at him and shake my head up and down and say “oh yeah bud that’s dada” knowing damn well that I’ll never be at that skill level😂😂
Sounds like your 2 your old was roasting you 😂😂😂
@@Badlander87X yeah that happens a lot as well… kids are ruthless…
@@fireice1997 oh I know kids have no mercy or filters . But you have to love them for that
why would you want air filter on a child@@Badlander87X
Adam, I work for a Filtration company- we always talk about a filtration train (multiple filters of different grades, coarser to finer) where the coarser filters protect the final filters. Each filter cuts down on the particulate load going through the next filter. You can then remove/clean the coarse filter when it blocks, in this case the foam filter. Technically the foam filter would be called a Depth filter which forces particles through a Tortuous path where particles are then removed from the air flow as they impinge on the filter media. Your fine filters (the paper elements) will filter fine particles from the air but they do not have a large dirt holding capacity. A bit technical but you explain it well to Non-filter people!
Have had my Africa Twin RD07A for 22 years and have always used foam filter over my paper filter.
Is there an off the shelf foam part that you use for the RD07?
Watching all your vids has given me a new ambition in life. My journey to get my motorcycle licence starts next week, at the age of 51. I want access to some of this fun!
Awesome. Better late than never to start your two-wheel adventures
have fun!
good luck, and have fun in your journey, from a fellow (not so) young student ;D
Awesome stuff mate! Get out there and have some fun, and enjoy learning a new skill!!
@@MotologyFilms 1 month on, and I've just purchased my very own Africa Twin. A beautiful '98 RD07a with just 20k miles on the clock!
Every time I see one of your videos I wonder why I don't watch your videos all the time, you are easily my favourite motorcycle UA-camr I think you have exactly the right mindset about motorcycle's.
Interesting , this is why it’s good to talk to people who run in different conditions . I would not of thought so in depth about the air filter if I had not watched you riding in those talcum powder roads you have in Australia .
You wanna become a better rider , watch every video on this channel! This fella can ride with the best of em!
Was trying to think of the word and then you said it... stoked. It means so much more getting THAT amount of performance from an old bike. I'm done with listening to those pricks trying to tell me how great new bikes are and what makes them ride great. THEY are not great, they are HEAVY and over complicated heaps of shit and THEY can keep them and their never ending BS. Everything I have tried from your advice has improved my bike so I am listening to you. Thanks
Haha, it's the satisfaction that comes with understanding and improving an old bike. Any little adjustment you make to reveal the bike's true performance is so rewarding. Some people think I've lost my way with the Warhorse, when in actual fact, I've found it.
Or maybe you're getting older!@@MotologyFilms
@@dznnf7 i think understanding comes to each person, that old or new it doesn't matter a lot, but in these days comes understandings - how simple or less you have it can be your CON . ( Its about motorcycles ) I'm 34 years old , and i have my Queen afrika 1994 . And i have money to buy tomorrow ducati desert x for example. But i choose to ride with my horse wich costed me 2200 eu 4 years ago. Now i wouldn't sell it even for 10 k . For me its more than only motorcycle. You know every sound that it makes and when its wrong. When i will be old i will pass it to my kid :)
I took the airbox inspection cover off the klr650 and rode 300km. I got 24km per litre. Before it was 21kpL. When I put cover back on it felt like a wimpy puppy. 😊
Good to see you back in the dirt kitchen Adam😅 Seriously can't believe anyone would doubt ur knowledge of dirt bikes?? But I'm guessing there are a whole new generation of "adventure" know it all's these days 😅
Waterproofing is such a cheap and cool improvement, it is so worth doing it besides if done right it will significantly improve the longevity, performance and economy
Mate, I love it when you talk (down) to the keyboard warriors. I constantly ask myself “why do people watch this stuff if all they want to do is say that you know nothing” !!! I’d love to know how many 4 Day Enduros, bike tests and international events they’ve done. Alex, I’ll listen to you mate, firstly I know sod all and second you tell a great story, your enthusiasm and knowledge is immense. And most of all I just love how much you love that bloody bike !! Good on ya mate.
Driving these bikes myself since the late 80`s and I am happy to see you giving them the credit they deserve. The biggest improvements for me was a "more" modern CDI unit, which totally changed the way the engine worked, as well as using fork emulators. Thank you for your excellent work and spirit!
would you remember or suggest which cdi unit to use? thank you!!!
I actually have a spare CDI, which the previous owner gave to me with the purchase. It's not a genuine one, maybe it has a modified ignition curve? I've not felt the need to change it because I love how the horse runs. I'm not necessarily chasing more power, just like to have her running smooth as silk.
@@MotologyFilms Thank You for commenting.
Agree... and its not about power.
But consuption dropped dramatically while at the same time the bike runs noticably smoother with less vibrations espesially after 5000 rpm.
It also include a safety from getting damaged, should the regulator fail.
I use the opportunity to thank you for this amazing, no mambo jambo work you do.
Great respect and kind regards from Norway 🙏
Buy ignitech cdi
You’re an absolute beauty man. Hands down the most raw/ no bullshit, true enduro rider on UA-cam. Keep up the great content !!
How i love the way, we, the people who appreciate, and we are owners of this old Bikes, always find a way to improve these lovely machines... From Patagonia, i surely i'll take this tips to modify my 89' transalp to get it on dusty roads and adventure tracks!! Keep pushing the warhorse. Cheers from Argentina
cuando andes por Córdoba avisá!!!
Dale!! Tengo amigos en VCP y Alta gracia
I was surprised with this video and had to check the books... my AT was born in 1993 and she has filter on top of the tank... yours must be the earlier one.
So glad you kept the FrankenScreen!😊
whaddya reckon, a 3d printed funnel piece that channels the air directly from the 2 ports on the side fairing to the airbox intake? or some flexible vacuum cleaner hose from the airbox direct to the open ports on the fairing? ala Kawasaki ZXR750 ram air?
That’s spot on that Adam. Makes sense. A lot of sports bikes have been using something similar, RAM air. Air is pushed in through from the front as you ride. Your new set up is the same.
I would pay, I mean PAY, to come visit you and your trails for a week. I'd love to learn your tricks n tips, you seem a fountain of not common knowledge. Thanks for the great videos
Warhorse sounded like a completely different bike while you were at speed on track. I'm jealous! 😅
Always learning from you. I've even startid a mechanic course on my own. Your existence, hints, job, life is my whole inspiration. Thank you so much Adam, Thank you!
My the life give you awesome rides and joyful moments with family and friends. Cheers!
Idea for you filling the dead space instead of the foam stuffed in there:
place a plastic bag in the area you want to block.
Then gather up the bag opening and use a few squirts of expanding builders foam into the bag.
When its hard cut away excess material.
Then it can stay in there forever.
Do same in the sidepanel by using cardboard or plastic tacked in place with glue gun, then squirt foam in again. Remove cardboard and trim . Job done
You're looking so happy during that presentation. Thanks a lot.
Thank you for the extra knowledge regarding everything about air filter, air box, air flow, etc. It helped me to understand better the all concept.
TRUE , SAME THOUGHTS👍
The way you grin at 1:05 in anticipation makes me happy 😄
I love the work around! Also, I enjoy how much thought you’ve put into it. Good stuff
The joy on your face and in your voice while talking about this!! Love it. Were those A-Star wellies?
Thankyou for your video Adam, you show real motorbike passion. Love your work from Spain
Really cool advice that can benefit all of us with older machines. Keep up the great work Adam!
I love how proud you are of yourself 😄
These are the kinds of practical & experienced lessons are what I'm here for. Thank you for sharing your insight. Gratz on the 164 kph/101 mph.
Love it.......All the best from Canada!!
Thoroughly enjoying the content Adam👌🏾
I binge watched the war horse series. I never thought to apply a foam pre filter over my paper one. Thank you for a great series.
Geweldig dit kanaal de foto van mijn eerste rd04 hangt boven mijn bed rood wit blauw.
Heb er drie gehad ook een rd03 geniale motoren . De rd07 ook twee gehad. Perfecte reis machines wordt hier zo blij van. Ook de modificaties en jou glimlach, terwijl je de mooiste en nieuwste machines kan rijden!!!
Love it 👋🥳🙏👊✔️
Love your new air intake system Adam. Another fab! video.
I wish I had something to contribute to your project but you have got it all covered.
Best ADV channel. My favourite advice out there. And Adam's presentation is meditative.
That factory trip meter looks just like Suzuki lifted it to use as the speedometer for the subsequent DRZ 400.
Very interesting and instructive. I appreciate and understand more this knowledge about the concept of airflow. Thanks Adam!
Great masterclass top. Amazing this Africa Twin
Always enjoy hearing the rocket ship Suzuki RM's mentioned/creeping into conversation, the overloaded utility guys don't grasp it when I say "give me an RM125 anyday of the week" 😅
Always good and informative to stop by at this channel. See you soon in Australia mate.
you are an inspiration for the younger generation!
Where it's at, always great advice and wholesomeness
You're right, over the years, some of the crazy air intake positioning has baffled me. I have always attempted to clear it up. Sometimes successfully, other time with little effect. Even on my old 1600-2.0Lt Kombies of the 80-90s running foam pod filters has contributed to noticeable running efficiencies. Keeping the dust out of the engine bay and the fresh cool air coming in, was always a factor.
Have a deposit down on a 450 Himalayan, one of the things I like is that air intake up high under the tank. One less problem to think on. It sports a paper filter, as long as I'm not trailing, all good. Can't wait to get my grubby hand on the ride. Maybe not so grubby these days. There are a few things I'm not sold on, but let's see in the next few years while I can still ride. Cheers.
I like the stitches and scar in the windscreen. Saw the drop done in the Netherlands and how you fix it. So cool that you still have it like a war memory…. Cheers from Germany.
Awesome content, been following since you got the WAR HORSE.
My 2006 Honda TA has been running rich since my last dusty trip, and tomorrow I'm checking the air filter, which is washable and oiled. Thanks for your channel.
Mate top Stuff , tapped into what a lot of Men enjoy about Motor bikes and we see it in you . Stew Baylor Gncc on the Big Dog 450 yamaha made a easy win avoiding a filter change in super dusty conditions one round . Tightish bulldust like corners dusting out the traditional airbox location. The War Horse legendary .
God Bless you Adam and you take very good care of yourself my friend
Excellent work as usual Aman.
Go the horse 😎
Adam, you are awesome man. Keep it up 🤜🤛
This bike is becoming quite the treasure. Also, you're a brave man documenting your speeds, and then posting it to youTube too! Be careful out there!
Great you won't have problems with toasting the reg/rec on account of the relocation from earlier generations. Nice work on the improvement and the content. Love it. RD03 owner in Norway 🤟
Brilliant as always Adam 👌
Super awesome. Also, got a good chuckle when I noticed at the end of the video that your thumbnail pose includes the yard boots and a hoody. Cheers!
Nothing says adventure more than donning a pair for wellies on the War Horse! Love the video
“She was haulin a$$”…yes, yes she was 😎🙌
Really enjoy your videos 👍 cheers for making them.
Hell yea!!! I’ll been waiting on the next video!!
Would love to see a video riding the new Africa Twin and see what's changed over the years.
They have addressed this problem with dusting the filters on the new Africa Twin.. the intake is forward facing high up in the front. Thanks for the educational videos.. even though I drive a crf 1100.
I had the same model with 100 000km on clock. My first bike. Rd07 model solved the problem with airfilter putting it in fron of the gas tank. But i think they made it more road oriented. As always vids are so informative and full of passion for motorcycling even 10yrs after I started to follow.
What's the fuel economy increase? I rewatched and didn't hear mention of what numbers you were getting other than top speed. Congrats on the upgrades, and thanks for the video!
Clever mod on the airbox… that’s a massive top speed difference!😲 I knew they weren’t going to be power houses, tuned for torque and all that… but I was shocked how low the stock HP figures were in your earlier video.
Interesting point on the foam filter skin… we were discussing recently filter skins including using a pair of tights around the K&N cold air intake kits for desert use, or even round the snorkel intake. Definitely helps. Fine mesh and all that. 😅🤘
I always run the Twin Air dust and sand covers on my KTMs… people say… aww yeah, I change mine every ride bro… pffftt… I don’t. 😅 I grease the lip, grease the contact area, make sure the airbox is dripping a little and run those extra two filter skins.
When it’s hard to start in the morning when it’s been out on the truck overnight in the damp/humidity then it’s time to change.
Take the skins off and the filter still looks new. Still moist too. Can bang on a fresh sand skin if you’re caught short for time or clean filters. 😅🤘
Do it right the first time and save yourself a load of dicking about. 😅 Those skins are not for shovel hands though… wrecks them every time. 🥴 Better that than the motor though. 😂👌
I have had to pause this at 1:45 mins just to comment on the absolute amazement at the way you ride the bike - I can’t even begin to comprehend how to cope with a drifting rear wheel without a major incident into the nearest hedge!
Great episode with clear results. Advantages two, disadvantages zero. Thanks for showing us, Adam, what practical knowledge can do. Happy days with the Warhorse, Günter/Nürnberg
Love this videos Adam! Thank you❤
Absolutely epic what you’ve done with this bike, giving it life from the very beginning finding it in that garage. I’m not sure I’d try a top speed run in no gloves though, you’ve got balls. 😅
i remember back in 1997 when i got delivery of my new xr400r , still in the box at the dealership, the mechanic and i pulled out the air box and the intake pipe had this 1/4 inch cut that was vertical instead of the 40mm round hole, that was the restrictions put in for being road legal instead of off road use, it's had a big restricted spark arrestor and they had the carburettor running tiny jets, i was amazed at how much Honda restricted that bike. it was a fantastic bike after it got proper airflow through the motor. , it's been fantastic following along with your journey with the bikes over the past year
Excellent advice! I am very conscious when it comes to what my dirt bike breathes (EXC500 2012) and in dusty conditions I short shift to take advantage of the torque (I also do it more regularly to keep the motor healthy for as long as I can). Lower gearing helps that too. Running 14/48 at the moment which for that bike and my riding is a golden medium. As always great clip man.
Loving it - keep 'em coming!
Top Speed Test….Riemann steps up to the War Horse….no gloves & gum boots !🤣🤣🤣😂 LEGEND
Thanks for the tip that all the community will follow 😁. I suppressed the separation in the between the airbox and put a hand made filter inside like we have on enduro and mx bikes. I can feel increased air flow and better mids
You may add fiberglass to form your custom air-box extention around the foamed pieces, and seal it off with glued-on sliced gas-tubes, or just cut out a larger flexible rubber item forming that air-box and cable-tieing it to the frame, or a rabbit-net wired support structure.
I’d add a blackened fine grid to your 2 air-box holes to avoid stones being venturied onto your air-filter.
Geez you look enthusiastic, missus must be so jealous 😜
Love what your doing and your camerawork rocks
Also love the Frankenstein windscreen look
you've pretty much made Natural Forced Induction, faster you go the more air is forced into the vents.
Went in to update a new CC number and saw the levels you recently created...glad to upgrade and support a good man and his family. Cheers mate!
Thanks mate
It's interesting to notice how Honda have adressed this issue with the RD07 model.
Until watching this video I never knew exactly about how the airbox was designed in the RD04. The RD07 has the airbox attached to the top of the carburetors and it sucks in air at the top of the fuel tank right behind the handlebar, so it doesn't have to deal with dust thrown up from any wheel, and you also can go through deeper water. Besides, they were able to lower the seat a bit by re-locating the airbox and also put the regulator/rectifier unit on the left hand side, away from the hot muffler.
Great video again, Adam! Thanks!
Awsome information. Mine will be getting the same treatment later 👌
Woow Adam now WARHORSE engine run soo smoooth👍💪, its Symphony for ears,,, Love IT💯❤🔥
Great educational video. Thank you so much!
Thanks Adam very interesting info on the air box and air filter set up
Just look the War Horse get up and go
Thanks
Dave
Man Ive gotta come down under maybe even move for the riding. What a place what a bike.
Another great video - I am picking up my RD07 tomorrow and the inspiration for the project has all come from your enthusiasm. Ignore the nay sayers, my guess is none of them ride in anything close to the conditions in Oz so have no idea the issues it causes.
Brilliant practical engineering!
Amazing achievement well done
I ride 2016 Africa Twin. Never liked the dual pleated paper filters and didn't want to go to K&N oiled. Watched what you did and ended up finding Uniflow filters there in Australia that sells and foam pre-filter with a very minor mod to the snorkels. I feel the 16 Africa Twin has a great air intake position just needed a little more for dirt. And now I feel I'll have that. Thanks for the thought process of finding a solution.
Now that's what I call a useful video
Engine sounds so healthy! 👌
“Pores” is the word your were searching for. My Rottweiler intake in the 990 does that pre oiled foam cover thing too. 👏
Greate video. Thanks for sharing your knowledge.
And there will allways be someone that thinks they know better. People should learn to be quite and just listen for a change.
All your video are full life, experience and joy
All the best 👍 for your future projects
Stay Blessed.
Lots of Love & Respect from Qatar 🇶🇦
The XRV community is all over this 👍
And I think I speak for most when I say we need that Akra. 😂
Excellent theory! The free flow of clean air through a motor is truly needed to make an engine breath for maximum efficiency.
Basic stuff, but just as important! Well done, good Sir. Oh, and I love your new adventure boots 🤭🤟
Ive done this on a few of my bikes. easy mod to get better air in. My xt660x are very restrictive, DNA side filter fixed that, I got the ktm 690 airbox lid, That made a great improvement with the evo tune. My dads klr we removed the snorkel and made more holes, My xr400m we drilled 6 1" holes on the side. A built motor so needed the extra air. on our dirt bikes we always remove the little rubber snorkel but no holes as we cross water. easy mod for an small boost and a large boost with a tune.
Awesome work!