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Yamaha MX & Off-Road Dirt Bikes
YZ125 won't start :(
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[QUOTE="matt-itude, post: 815625, member: 54752"] go back to the basics as mentioned. they teach for an engine to even try to run you need 3 things compression spark and fuel. if the plug ends up wet after trying to start it we have fuel(now on the fuel we could still question quality as previously stated). we need roughly 90 psi of compresion to even fire decently although it should have a fair amount more. and you need spark you could take an old plug and open the gap up a little more say 50 to 60 thou total and plugging that on and holding it to ground on the cyl head while kicking the engine (be carefull not to ignite the air and fuel that comes out of the spark plug hole or leave a plug in it) if it will jump the wider gap it should atleast be strong enough to start the engine. figure which is not there and that will give you some direction. also make sure you havent totally flooded the crank case trying to start it. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
YZ125 won't start :(
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