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choke stick thing, air leak?
haven't posted here in a while! ...yes I still have my moto .
bike hasn't been restarting without a tiny bit of throttle for the last month now. figured out today by pushing in the choke lever it restarted easy. wondering what anything thinks, can there be some kind of leak? im not sure about it because when I "pushed in" the choke lever it didn't really budge at all , didn't really make much of a difference. like theres no play in the choke lever... but somehow pushing on it before starting helped ..maybe |
I'm not going to be any help, but I am wondering why you decided to push the choke in instead of pulling it out? Usually to start the bike cold, you pull the choke out to cut off the air supply and put more gas into the combustion chamber. Pushing it in would allow more air into the cylinder, but for it to start easily makes me think that it might have had too much gas, but then it wouldn't start right away, at least not without a little backfire I wouldn't think.
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All the 'choke' on CV carb really is another carb venturi to give you a fast idle and added fuel . The plunger you pull on opens an airway to a small venturi and that's what adds fuel.
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Originally Posted by LemonRX
(Post 541228)
I'm not going to be any help, but I am wondering why you decided to push the choke in instead of pulling it out? Usually to start the bike cold, you pull the choke out to cut off the air supply and put more gas into the combustion chamber. Pushing it in would allow more air into the cylinder, but for it to start easily makes me think that it might have had too much gas, but then it wouldn't start right away, at least not without a little backfire I wouldn't think.
again Im not diagnosing the bike when its cold its starts up fine when its cold. the bike doesn't restart well without a tiny bit of throttle.. WHEN HOT or WARM .... since needing throttle would suggest the needs more air to start ...I tried pushing the choke in, just in case case there was a leak at the choke where it was causing more fuel to get into the engine during startup... when I pushed it in the choke didn't push in at all but the bike seemed to start up better. read the fkn post lemon...it was just a random test I tried because I am stumped with the issue. |
Starts fine when cold. Needs a little throttle when warm/hot to start. Do you need the choke when starting cold? If not sounds sounds like it’s a bit rich. Which when warm could need the extra air to lean the mixture to start. I could be wrong tho... what’s your mixture screw set at? You might want to put in your signature your jetting and needle setting, plus any mods you have done to help our diagnoses... |
Originally Posted by horror_fan
(Post 541253)
again Im not diagnosing the bike when its cold its starts up fine when its cold.
the bike doesn't restart well without a tiny bit of throttle.. WHEN HOT or WARM .... since needing throttle would suggest the needs more air to start ...I tried pushing the choke in, just in case case there was a leak at the choke where it was causing more fuel to get into the engine during startup... when I pushed it in the choke didn't push in at all but the bike seemed to start up better. read the fkn post lemon...it was just a random test I tried because I am stumped with the issue. Sounds like no big deal. I've had numerous bikes that required slightly cracking the throttle to start when warm. It does maybe need a bit more throttle to start, but not while idling. I have some thoughts why that may be, but without being relatively sure I will not say why. Remember, it's not pulling the slide up, it is opening the butterfly, which will affect how the idle mix circuit works, due to the location of the holes relative to the butterfly. |
Originally Posted by RaceGass
(Post 541255)
Starts fine when cold. Needs a little throttle when warm/hot to start.
Do you need the choke when starting cold? If not sounds sounds like it’s a bit rich. Which when warm could need the extra air to lean the mixture to start. I could be wrong tho... what’s your mixture screw set at? You might want to put in your signature your jetting and needle setting, plus any mods you have done to help our diagnoses... it was the mixture screw WHEN I HAD THIS ISSUE (and every other issue I've brought up on this forum) ... the mixture screw was set to 2.5-2.1 I had been playing in this range ONLY based of forum members BOGUS recommendations. "dyno tests" whatever .. honestly was the worst advice I could get ... and the fuel ratio proves it. Got to wrenching today from the mistake I made last night (thanks to klx67.. whatever) I pumped the air up and now I run STEADY 12.3-12.7 02 range @ 1.5 turns out ...maybe the gauge is bogus?... okay but I have no decel pop no hard cold start no hard restart After running 1.5 turns on the mixture all my problems were solved... and honestly it could prob go to 1.3 turns out stock. When I first posted, I made it clear what my setup was and you guys gave me some bogus advice & a hard time.. ...was recommended 2 or higher because it was "dyno tested" and proven ... BS...what a waste of time. idc what anyone says ... - proper valve clearance - no leaks anywhere - proper oil level -stock airbox , clean filter -stock muffler + headers -stock motor - plugged EPA suction valve -carb with the stage 1 dynojet kit for the 09 klx using the smallest main jet and a 38 or 40 pilot Should be run with the mixture @ 1.3-1.5 turns out. Im pretty sure Dynojet only recommends 2+ turns out for modified air. |
Originally Posted by klx678
(Post 541260)
Sounds like no big deal. I've had numerous bikes that required slightly cracking the throttle to start when warm. It does maybe need a bit more throttle to start, but not while idling. I have some thoughts why that may be, but without being relatively sure I will not say why. Remember, it's not pulling the slide up, it is opening the butterfly, which will affect how the idle mix circuit works, due to the location of the holes relative to the butterfly.
the bike shouldn't need to crack throttle ... the point of electric start is convenience ...having it start like a car would + not having to break your back from excessive kicking . |
Originally Posted by horror_fan
(Post 541275)
it was the mixture screw
WHEN I HAD THIS ISSUE (and every other issue I've brought up on this forum) ... the mixture screw was set to 2.5-2.1 I had been playing in this range ONLY based of forum members BOGUS recommendations. "dyno tests" whatever .. honestly was the worst advice I could get ... and the fuel ratio proves it. Got to wrenching today from the mistake I made last night (thanks to klx67.. whatever) I pumped the air up and now I run STEADY 12.3-12.7 02 range @ 1.5 turns out ...maybe the gauge is bogus?... okay but I have no decel pop no hard cold start no hard restart After running 1.5 turns on the mixture all my problems were solved... and honestly it could prob go to 1.3 turns out stock. When I first posted, I made it clear what my setup was and you guys gave me some bogus advice & a hard time.. ...was recommended 2 or higher because it was "dyno tested" and proven ... BS...what a waste of time. idc what anyone says ... - proper valve clearance - no leaks anywhere - proper oil level -stock airbox , clean filter -stock muffler + headers -stock motor - plugged EPA suction valve -carb with the stage 1 dynojet kit for the 09 klx using the smallest main jet and a 38 or 40 pilot Should be run with the mixture @ 1.3-1.5 turns out. Im pretty sure Dynojet only recommends 2+ turns out for modified air. Ride on Brewster |
It's the forum's fault you don't know how to tune the carb? .... and you never said what elevation you're at!
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