How to Balance Motorcycle Carbs

  Рет қаралды 303,967

Forrest Trenaman

Forrest Trenaman

11 жыл бұрын

I am going to show you how to mahe $5 motorcycle carburetor synchronizer, and see how well it works at balancing a set of motorcycle carbs on a 1980 Honda CM400.

Пікірлер: 199
@cri8tor
@cri8tor 5 жыл бұрын
Over six-years old and still totally relevant. Cheers
@mcdonaldchris86
@mcdonaldchris86 10 жыл бұрын
Thanks bro!!! You just saved me 70 bucks, and gave me a good reason to pickup a 12 pack.
@DrLelantos
@DrLelantos 10 жыл бұрын
Just in case you break 10 of the bottles trying to make it right ;]
@brf001
@brf001 11 жыл бұрын
You continue to amaze me with your clear understanding of mechanical devices and your ability to simplify them for those who don't. Good work!
@joebananas4741
@joebananas4741 8 жыл бұрын
Great idea, seems more accurate than the commercial balancers. I don't drink so I will have to find some bottles from somewhere.
@lynxonwatch
@lynxonwatch 6 жыл бұрын
Thanks a lot, just built my sync tool following your idea, and it worked great. Honda Transalp XL650V now purring like a big cat...too bad it's winter time here ;).
@alextupou4992
@alextupou4992 7 жыл бұрын
Brilliant! CW and CCW.... rubber stops in the freezer. ...heard the sound difference. ..excellent video man.
@filmfreaken
@filmfreaken 5 жыл бұрын
Thank you alot for this video, it helped me create this tool from scratch and i've synced carbs on multiple bikes with this!
@genecurl6284
@genecurl6284 4 жыл бұрын
Glad I found your video. The vacuum tester Kawasaki recommends is $1,322.00 and I only paid $1000.00 for my bike, so. . . .
@rikdol
@rikdol 2 жыл бұрын
Omg thanks!! I know it’s an older video but for any 2 carb setups this is pure gold. Was fiddling around with a hose filled partly with oil. Watching the levels rise to fast oil in engine aargh. This will make it much clearer!
@SprayIgniteBoom
@SprayIgniteBoom 6 жыл бұрын
that is freaking ingenuous!!! You are why this platform exists. Sharing useful simple daily tips. Good job!!!🖖👌🍫
@osmoregulatoryorgan
@osmoregulatoryorgan 7 жыл бұрын
That's probably one of the better setups I've seen on YT. Nice one.
@fasteddieskustoms
@fasteddieskustoms 11 жыл бұрын
Your a genius man. I wish you nothing but luck and prosperity in the future .
@chukaz
@chukaz 5 жыл бұрын
Just did my own tool for my V star 650 and it worked great, thanks for the video.
@danjaynes2137
@danjaynes2137 11 ай бұрын
Thank you for the clear and thorough demonstration. Great video.
@Terkee
@Terkee 9 жыл бұрын
Best sync vid on KZfaq and I have watch a lot of them.
@nightsongs
@nightsongs 4 жыл бұрын
For someone who is new to motorcycles, and likes a visual representation of the effects actions have other than a needle on a gauge this is awesome!
@costelconstantin978
@costelconstantin978 3 жыл бұрын
Made it two days ago on my Silverwing 2001. ! Huge deference! Thanks buddy!
@heartfang21
@heartfang21 7 жыл бұрын
looking for a way to synch my carbs on the same bike you have! haha! so this was fantastically informative. Thanks!
@BasicPoke
@BasicPoke 4 жыл бұрын
Thumbs up for the carb sync animation at the end. Thanks for the video.
@mikelachance2058
@mikelachance2058 8 жыл бұрын
I just synched my carbs on my 1980 Honda CX500. I'd never done it before and was nervous about it. Used your method and they synched up perfectly. Thanks for posting.
@adrianc4712
@adrianc4712 7 жыл бұрын
cool! i have a 1978 cx500 and was also kind of nervous about this but after seeing your comment i will try this this weekend
@aaronraynor8785
@aaronraynor8785 7 жыл бұрын
good to hear I'm not the only one that's nervous. ill try this on the weekend.
@danielkenway2413
@danielkenway2413 6 жыл бұрын
Did the tubes fit right into the sync port or did you need an adapter? I have 1980cm400a so what worked for you I'm assuming will work for me lol
@scottjones5455
@scottjones5455 5 жыл бұрын
I too have a 1980 cx500. It's about to turn 20k miles. The original owner must have kept it in the garage because it is in top shape. The guy I bought it from was the second owner. He knew nothing about maintenance and had just had the valves adjusted and carbs rebuilt so I'm probably good to go for a while, but when it starts running rough, I'll know what to do. Great video.
@cheesymcbuttkins6323
@cheesymcbuttkins6323 8 жыл бұрын
Great video and well edited. This seems to work and I will definitely be referring it to some friends
@Bwalt1
@Bwalt1 8 жыл бұрын
You did a good job at explaining, btw the level difference in each bottle does not matter as long as if It does not move.
@lmdetect
@lmdetect 8 жыл бұрын
Exactly.
@ELCLAVE300
@ELCLAVE300 3 жыл бұрын
I did this and one bottle goes completely empty.
@ddubrall
@ddubrall 8 жыл бұрын
best one I've seen yet!
@HowardNChauncey
@HowardNChauncey 10 жыл бұрын
I love the way you broke it down.
@hotdogdog4740
@hotdogdog4740 5 жыл бұрын
“Fish tank tubing” ichiban moto would be proud
@herbmorris2762
@herbmorris2762 7 жыл бұрын
Well done video. Thanks. I'm going to give it a try!
@paulbarnett5818
@paulbarnett5818 8 жыл бұрын
awesome video, I have done a similar thing, but I used auto transmission fluid as it is an oil and if for any reason it got pulled into the bike it would be okay, oil good...water bad, I also found that the auto trans fluid was less jumpy in the container and showed more accuracy than water. used very successfully on a '96 XV1100S Virago. Paul.
@Lonnie-bb5ok
@Lonnie-bb5ok 2 сағат бұрын
This is an excellent vid, and very ingenious, cost effective, thank you 👍
@Nicolas-xg6pg
@Nicolas-xg6pg 7 жыл бұрын
Great video! Really useful! Thanks!
@grreeknick
@grreeknick 10 жыл бұрын
Your videos are the antithesis to the stupidity of youtube comments. Brilliant!
@MarcoBiscarini1
@MarcoBiscarini1 7 жыл бұрын
Great video man! Hope this works for my bike.
@davidthompson103
@davidthompson103 11 ай бұрын
Great job, doing this on the weekend 👍
@SwedenAirhead
@SwedenAirhead 4 жыл бұрын
This was fun! I´m propably make one to! Thanks!
@Zkkr429
@Zkkr429 9 жыл бұрын
Great video, I will be making me one of these bottle indicators!
@roman_verenich
@roman_verenich 10 жыл бұрын
Amazingly! Greetings from Belarus HighFive!!!
@twistedmetal701
@twistedmetal701 9 жыл бұрын
Thankx man. Very informative
@malcolmhodgson7540
@malcolmhodgson7540 3 жыл бұрын
What a superb result.
@reido2000
@reido2000 9 жыл бұрын
Gonna try this out on my 82 Suzuki gs400 this weekend. Thanks.
@bobs2440
@bobs2440 10 ай бұрын
Great video and synch tool. Others may have said this, but the relative heights do not matter with the tool you created, only that they no longer move fluid between the two bottles.
@williamramsey4431
@williamramsey4431 3 жыл бұрын
Thank you sir!!!! Cheap and appears to work.
@abelbabel8484
@abelbabel8484 5 жыл бұрын
Good info, well presented. Have a thumb
@pauls28
@pauls28 9 жыл бұрын
Great Video! I need to sync my Yamaha Super T carbs, lost some power last year on a red line and I think this is the issue from what I've read in the forums. Defiantly a thumbs up on this one!
@alexandergardner2396
@alexandergardner2396 9 жыл бұрын
Paul spisak Hey Paul, Is that on the old 750 Super T or the new 1200?
@michaelwilliams4974
@michaelwilliams4974 3 жыл бұрын
Great video man
@2369chico
@2369chico 11 жыл бұрын
That's cool . well done .thanks for sharing.
@liferider2089
@liferider2089 Жыл бұрын
A good monometer set up because of clear hoses to carbs NOT connected directly to carbs (just to top of bottles) so liquid doesn't get sucked into engine.Nice one ;)
@boomerguy9935
@boomerguy9935 5 жыл бұрын
I just sync'd my dual carbs on my 1988 Honda Shadow VT600 VLX using your procedure and manufacturing instructions for the homemade manometer. It worked great! One suggestion: Don't overthink the CW vs CCW thing about the adjusting screw. Just watch the tiny bubbles in the crossover tube (I used red ATF instead of water) and you can see the direction of flow. This is much quicker than waiting for the level to change in the bottles. Also, my screwdriver had to be in a vertical position, pointing downward from where the gas tank was attached ( had to remove the tank which turned out to be a good thing because I discovered a leaking petcock) which put weight on the adjusting screw, so I removed the screwdriver after each adjustment. I also "blipped" the throttle a few times throughout the adjustment. Total time of actual adjustment was less than 10 minutes. I don't know if it made a difference but I reinstalled the air filter housing after installing the brass adapter tubes and clear plastic fuel lines (5mm ID) for the adjustment.
@viliusbivainis7883
@viliusbivainis7883 7 жыл бұрын
Great video! Thanks
@ricardomunoz2010
@ricardomunoz2010 5 жыл бұрын
Awesome tutorial
@KK-mx2di
@KK-mx2di Жыл бұрын
Thank for knowledge ❤❤❤
@crash5868
@crash5868 4 жыл бұрын
I like the freezer tactic. I have got four carbs to do on my Kawasaki 550 zephyr but I'm sure I can figure out the build.
@sinisakragulj104
@sinisakragulj104 4 жыл бұрын
thank you! very helpful!
@alexteo2738
@alexteo2738 Жыл бұрын
Thanks for cheap and good idea!!! ;)
@nivlacker101
@nivlacker101 11 жыл бұрын
didn't even know such a thing existed thanks
@Watupm
@Watupm 11 жыл бұрын
moving the H at the end was cool lol XD
@ulises83
@ulises83 10 жыл бұрын
awesome my good sir. Thank you!
@deadguy237
@deadguy237 11 жыл бұрын
bike sound real nice man. enjoy in and very funny out tro
@nevek20
@nevek20 11 жыл бұрын
I didn't mangle my hand via my bike but i did mangle my hand and my surgeon was talking about how hands are the hardest to put back together properly and in conversation we got onto the topic of Bikes and common injuries and hands are common as you put your hands out infront of you to save yourself.
@MarkLoweLowebrau
@MarkLoweLowebrau 3 жыл бұрын
Good job!
@elstupidos3863
@elstupidos3863 7 жыл бұрын
nice video ! what did you take to conect the tubes to the cylinder ?
@snatr
@snatr 2 ай бұрын
That is cool. I gotta try this! Was thinking about using a light oil instead because if you watch @7:00 when you rev the engine, you'll actually see water vapor form in the bottles. Although a little water vapor in the engine is no big deal. And btw, did you know you can actually boil the water off with enough vacuum. Science 😉
@TriniRogue
@TriniRogue 9 жыл бұрын
Lmao @ actually throwing em in the freezer take a thumbs up just for that.
@SpecThompsonTV
@SpecThompsonTV 11 жыл бұрын
Great tip.
@OU8121ST
@OU8121ST 10 жыл бұрын
Awsome vid
@jotarokujo6729
@jotarokujo6729 5 жыл бұрын
I’m going to try this on my 89 gs500 ! Hope it works
@arvincharlesatega5660
@arvincharlesatega5660 9 жыл бұрын
Deserving to be subscribed, thanks
@Zakamooza
@Zakamooza 6 жыл бұрын
can you bypass the bottles and just hook the tubes directly in the carb vacum ports ?
@benjaminwest2281
@benjaminwest2281 3 ай бұрын
Thank you Forrest. Very good video. I like how you had an old motorbike also. Have you done this under a load, also? Say 2200- 2500 rpm, to adjust the cable lenghths? Ok, take care, Benjamin
@Maruti_motoshop
@Maruti_motoshop Жыл бұрын
Brother, if you set the air screw of the throttle, then the rpm will also change?? 
@CandiiBanks
@CandiiBanks 9 жыл бұрын
Haha you're a legend, great watch!
@daniiielherix6223
@daniiielherix6223 7 жыл бұрын
good idea !
@bjamesW32
@bjamesW32 10 жыл бұрын
You mention at the beginning that you don't care for the gauge manometer because the needle keeps jumping around at idle. I wonder if you could simply use a damper in-line? Perhaps something as small as one of the bottles you are using for the fluid manometer or a bit larger? Ultra easy to try anyway. Just a two port rubber plug to stop the bottle and the air volume inside smooths erratic pressure/vacuum changes without altering the mean pressure/vacuum, kind of on the order of an anti-knock riser in plumbing.
@combinbain
@combinbain 9 жыл бұрын
Nice video! I can't get one point: can I make this calibration even without cleaning the carburators first? I mean, I have my bike in here in her side stand, can I just try out your method or I need to do anything else first?
@MegaChevy65
@MegaChevy65 6 жыл бұрын
Nice. Where do you get rubber plugs though?
@joelcastro4521
@joelcastro4521 Жыл бұрын
What do you use to connect it to a 84 Honda shadow 700 I mean to the engine
@AuMechanic
@AuMechanic 8 жыл бұрын
Vac gauges are plenty accurate enough, all you are lacking is a small air tap found on fish tank air pumps which needs to be closed down so that the vac gauge just stops pulsating. One for each gauge.
@runsolomon
@runsolomon 6 жыл бұрын
Where do I get the fittings for the vacuum ports
@paulb4777
@paulb4777 5 жыл бұрын
I'd like to use the same method on a set of SU HD6 Carbs but I don't know where to connect the two synchronization tube's. Could it be to either the overflow or the suction pipe?? - Great video by the way 10/10
@andremestanza8852
@andremestanza8852 6 жыл бұрын
You are a champ
@konr4d
@konr4d 4 жыл бұрын
brilliant
@W3BZSL1NG3R
@W3BZSL1NG3R 11 жыл бұрын
I have a 72 cb 750 4 into one long tube header kerker pipe love my bike
@spartn2304
@spartn2304 5 жыл бұрын
How does this work on a 4 carb setup? Just have to check 1/2 - 1/3 - 1/4?
@L0manO
@L0manO 10 жыл бұрын
Thanks!
@Zaiyetz
@Zaiyetz 11 жыл бұрын
The boat man, let's see the boat!!
@AnthonyJenningsTech
@AnthonyJenningsTech 11 жыл бұрын
I have these carbs for my '78 CB400T II Hawk :)
@eliseoebarahona9486
@eliseoebarahona9486 8 жыл бұрын
where did you buy the rubber plugs?
@csselement
@csselement 3 жыл бұрын
It seems one could do a fair job merely by sound. Thoughts?
@knd266
@knd266 3 жыл бұрын
stupid question I guess but where did you get the rubber stoppers? Hobby Lobby or something?
@korzbro35
@korzbro35 6 жыл бұрын
Man, simplicity of your idea is awesome! Thanks for sharing this. Out of curiosity, is it possible to make this for 2+ carbs?
@vertonmccaulou5
@vertonmccaulou5 4 жыл бұрын
Just have to start at one end and do 2 at a time
@MegaVranjanac
@MegaVranjanac 5 жыл бұрын
Do you sync them at 2k rpm or just at normal 1k idle ?
@a-voroshilov
@a-voroshilov 6 жыл бұрын
Прикольно, спасибо
@ugotgankked
@ugotgankked 5 жыл бұрын
I tried a different set up and got water sucked into the carbs. Now the bike won't start! How do I get the bike to start again (it's a 2009 ninja 500r)? Going to use this method in my next attempt, thanks for the vid :)
@ddmarin1833
@ddmarin1833 3 жыл бұрын
Excelente
@yuza791
@yuza791 5 жыл бұрын
Grande!
@room311tattoo
@room311tattoo 9 жыл бұрын
Thnks !!
@deankingi7417
@deankingi7417 11 жыл бұрын
Your a genius
@Vjiovino
@Vjiovino 5 ай бұрын
How would you make this for a 4 cylinder bike ??
@ergner
@ergner 8 жыл бұрын
How can carbs air-fuel adjust?
@MarcGraedtke
@MarcGraedtke 8 жыл бұрын
Great!
@W3BZSL1NG3R
@W3BZSL1NG3R 11 жыл бұрын
Love Honda
@BryanKale777
@BryanKale777 11 жыл бұрын
Nice a buddy of mine is balancing for cards right now
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