Bike only running on hot start

[evoetr]

My bike only starts and runs when i pull the hot start lever, ive had the carb cleaned by a motorcycle shop. As soon as i let go of the lever it dies.

Any suggestions ? (This is for Yamaha 2003 YZF450)

Could it be the vavle clearence ?

I also have to keep the choke out is well as the hot start lever. (But this could be because i haven't let it warm up.)

[dafydd roberts]

My bike only starts and runs when i pull the hot start lever, ive had the carb cleaned by a motorcycle shop. As soon as i let go of the lever it dies.

Any suggestions ? (This is for Yamaha 2003 YZF450)

Could it be the vavle clearence ?

I also have to keep the choke out is well as the hot start lever. (But this could be because i haven't let it warm up.)

Sounds like a carb problem.

[Rupe]

is your air filter clean?

I would of thought it was a carb problem, and cleaning would fix.

It's pretty easy to check valve clearances, youtube it.

[vr4king]

Doesnt the hot start make it a lean condition?

If so id say its a carb issue causing it to run rich and when you pull the HS lever it makes the mixture just right to run,Perhaps the shop that cleaned it didnt put a mixture screw back right etc etc etc

[Rupe]

Doesnt the hot start make it a lean condition?

If so id say its a carb issue causing it to run rich and when you pull the HS lever it makes the mixture just right to run,Perhaps the shop that cleaned it didnt put a mixture screw back right etc etc etc

as far as I know the hotstart lets more air into the carb. If it needs this to run it's either struggling to get air, or getting too much fuel.

[B0000M]

hmm.. hot start allows more air, while the choke allows less air.


definately a carb issue, or possibly an intake manifold leak

[dafydd roberts]

I would check for a blocked air jet at the back of the carb.

[riffer]

Blocked air jet is a good start; follow that up by checking to see what state your air filter is in.

[evoetr]

Hay guys, thanks for all you help... Sadly my bike went up in smoke with the garage yesterday morning :crybaby: along with my younger brothers motox bike that wasn't insured and a car that was...

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[White trash]

Holy fuck! What the hell happened to the rest of that bike? Like, the swing arm and front wheel rim?

Has all the aluminium melted off it or did you have it in bits for maintenance?

[evoetr]

Holy fuck! What the hell happened to the rest of that bike? Like, the swing arm and front wheel rim?

Has all the aluminium melted off it or did you have it in bits for maintenance?

Holly crap..! I didn't even notice the swing arm was missing, yep was on so it melted like the rest of the aluminium... :( the bike was all in one peace ... the only thing that wasn't on the bike was the air box (but that was on the bench which also went up in smoke).... front rim and all that melted...

I'll chuck some more pic's in my other post.