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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
pw50 won't start, please help!!!!!!!!!!!
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[QUOTE="Jasle, post: 855099, member: 26675"] close to 100psi when fresh. these are some low compression beasts. I've seen them run below that. You could disconnect the start/ run swith like already mentioned. this will allow you to start it in run and eliminate the start retard timing function. have you checked the reeds? if a dirt clod got stuck in there you will see lower compression readings and it is very hard to start if at all. You can drop a bit of gas in where the reeds are while they are off to test the carb theory. I've seen them very hard to start if they had an air leak on the carb boot between the filter and carb. They just don't pull enought vacuum to get the fuel up there. Make sure your using the middle choke posistion. It pulls the choke/fuel enrichment slide up the furthest. If you pop the dome off you will find bad scoring near the exhaust port...almost always have it there. You will need to overbore it min .010" unless its got super low hours on it. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
pw50 won't start, please help!!!!!!!!!!!
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