2004 Yamaha YZ 250 F Logo
Posted on Jun 14, 2009

Hard to start when cold, low compression in kick starter

I own a 2005 YZF 250, when it is cold it takes me forever to start, and there is very low compression in the kick starter I've clean the air filter change the oil and the spark plug regally (all the basics) and haven't got a clue what it is. Cheers

1 Answer

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  • Posted on Jun 14, 2009
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You might of burnt your pistons ring out and now they are not pressing against the edge of the cylinder

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Kickstart problem

Hi crazy

Your bike has an automatic de-compression lever that helps when starting. This mechanism will make it feel like the bike has low compression. If it is maladjusted, it may be causing the problem

check here for adjustment procedures to be sure that it is set up correctly.

Other than that, low compression pretty much means top end rebuild.

regards
robotek
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