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Won't idle until it is warmed up... - Motorcycles

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Depending on the type of intake system, if it's a normally carburettored bike, there is an air mixture screw on your carby(s). Set this screw at one and one half turns out from being screwed to stop. Run bike till it is warm and set IDLE screw or throttle stop at optimum idle revs. Without using choke or throttle, turn the air mixture screw slowly in or out till revs build to highest level. Reset idle screw or throttle stop to set revs back down to optimum level as before. If this does not cure your problem, depending on if it's a 2 or four stroke, single or multi cylinder engine your problem may be one of many from fuel ratio, valve rocker clearance, ignition, plug range etc....specify make/model for proper info.
Cheers

Posted on May 21, 2010

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Posted on Jan 02, 2017

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Why won't 1981 suzuki gs 550 bike won't start after riding it and it's warmed up?


hi
glad i served a long time with wisco and used drag raced for them at one time
sounds to me that your ignition is to far retarded
which means the ignition will spark closer to (TDC)
top dead center
some people advanced the ignition 3 deg to stop the engine from smoking when they did away with 4 star fuel
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doing this the performance is great and fast acceleration
but it also make the engine run hotter than normal
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the whole idea is get the fuel/air mixture in and out as fast as possible

if you still have points
take your points cover off and adjust your points baseplate
undo the three screws that hold it in place
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hope this works for you

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