NBstunter

so i fixed my problem with my xr100 leaking when in a wheelie turn the gas 1/2 way off and i zip tied a little bottle for the little bit of gas left to go. but it trys to stall when i get past bp i got a 12 bar on it and the only thing i can use it for is putting my foot on theres no way i can hit it and the motors still running has anyone ever tryed putting there carb at an angle so that its not so tipped in a wheelie?

12oclocker

Doug Domokos the wheelie king would tilt the carbs forward.
on my XR80 I turn the gas OFF before riding a wheelie, then when your float bowl runs out of gas, turn the gas back on.
You get a few minutes of wheelie time with the gas off.
block your overflow tube if needed, my 400EX has a screw in the overflow tube. I am constantly turning the gas on and off on that thing

NBstunter

is the problem why it stops running from getting to much gas or not enough?

12oclocker

too much gas, its flooding, the float trips on when the bike wheelies, and causes the float bowl to overflow with gas.

NBstunter

oh... i thought the float went back and stopped the flow. would a better air filter help? i have never looked at the air filter on this bike sinse i had it maybe its not very good

imafrogg420

that would be something cool for ryan moore to machine up

an adaptor that would tilt you carbs on your xr 70 100 150f and so on

NBstunter

yes that would be cool. cause the way my 12 bar is looking and my subframe im not good at making this stuff lol

12oclocker

yeah that would be a cool part for someone to make, on the old bikes doug would ride, he could take the rubber inlet from the carb to the engine, and turn it upsidedown., and it would give the carb a significant forward tilt, then his bikes ran fine vertical.
Now days you cant do that, even if you have a rubber boot that you can turn upsidedown, your carb wont mount back up to the airbox. you would need a custom boot on both sides

imafrogg420

yea sounds do able though. I bet you could find one from a different bike or something or maybe at some kind of hardware store/bike shop

NBstunter

put a K&N filter right off the end of the carb like i did with my scooter and take the air box off

MikeyObrien

Hi yess i have a proplem too everytime im kiking my bike up ever so often my carb is leacking and am not quit sure why i think the sealing might of gone but it is hard to get old of a part like tht could anbody help ?

E-Loc540

??? all you guys have to do is re-adjust your float height. Lower the fuel level in the bowl by slightly bending the float needle tab towards the needle. It should only take 15 minutes. To hell with turning the gas off and plugging the overflow tube.

NBstunter

does that mean it will run at 12 o clock??

E-Loc540

Yep, and stop spewwing gas out at balance point...

12oclocker

Hey E-loc what up! which carbs have you done that on? dont your bikes have the Keihin FCR Carbs?
I've noticed the Keihin FCR Carbs are kick *** for vertical, I've never had one on a bike that ever flooded during vertical! It's every other carb that seems to suck! lol

E-Loc540

Honestly all carbs are near the same but its the small bikes that seem to have the mis-adjustments...

NBstunter

sweet i know what im doing this afternoon! so you just bend the tap that holds the float twards the bowl?

edit: oh wait you said bend it the other way ok nvm

E-Loc540

yeah and it only needs to bend a couple millimeters unless its way off already.

NBstunter

its already done it doesnt stop a little bit of flow of gas coming out but i just turned the gas 1/2 off and its fine. and it DOES work at 12 oclock

Jeezo

Sorry, bear with me I'm new here,


I assume the Keihin FCR you guys are using is with a fullsize sumo right?

Dont those have accelerator pumps? I would think that makes a huge difference with the carb being at extreme angles. Does anyone know if there are any carbs made for small displacement bikes that have accelerator pumps? I would think that proper jetting for a low float height combined with a forward leaning angle on the carb could help, but it wont solve everything.

Am I on the right track here?

I'm gathering info to build a little stunt trainer out of a kx80 frame and prob an xr100 motor.