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Yamaha Yfm250 Moto 4 Quad Not starting when warm


dylan_elliot
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Hi,

I have a moto 4 That will always start 1st or 2nd pull when cold and runs fine until it gets warm and i turn it off after this it won't start again till about 20 Min later, Then it goes with no problem i have no idea what's causing this so any help is really appreciated.

Also i know this is a motorbike fourm but i don't know any other fourms i can post on :)

I'm not 100% on the year i think its around 89-95

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First thing to try dylan is the spark plug , they can break down when hot , then the coil,,, or coil lead,,, remove cap [unscrew] cut 10 mm off the end and screw cap back on.. :yeah: ,, then report back.

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Also i forgot to say sometimes i can get it started when it's warm and it will idle fine until i touch the throttle and it just dies, One time i was able to bump start and as long as i kept it at a decent speed it would stay running but if got to say 5mph it would backfire and die

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