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mclean133

Need help 08 YZF 450

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I have a 08 450 the bike seem's to be poping and backfireing when your are just off idle and when you get off the gas also i have played with the air screw it does not help what could it be.:cheers:

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too lean on the bottom. it will get better when the temps go up. or you can richen up the slow speed circuit

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If it sat all winter, your pilot jet is gummed up. Pull it and clean it or replace it.

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