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Yamaha MX & Off-Road Dirt Bikes
YZ450F ringing when hot
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[QUOTE="taloolamx, post: 1224059, member: 72778"] Got a mate that rides an 07 YZ450F. Regular oil changes, synthetic oil, valves appear to be in spec. When the engine gets warm, there is a slight ringing sound as the bike is revved. I'd say the performance of the bike doesn't decrease, just that the ringing increases. Any ideas of why? Also, I want to put a high compression piston in my YZ250F. I was told that I need to run race fuel to do this. However, the 08 Yz250F already comes with a high compression piston but does not require race fuel. Do I really need race fuel if I install a high compression piston on my bike? Thanks for any feedback given. DRN rules. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
YZ450F ringing when hot
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