Piston and Cylinder crapped out - Page 4 - Yamaha Raptor Forum
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post #31 of 32 (permalink) Old 08-01-2019, 08:13 AM
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Smaller bores and combustion chambers can tolerate higher compression ratios. A Raptor is like a single cylinder V8, the large bore is more likely to encounter detonation than a 250 or 450 running the same octane fuel.
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post #32 of 32 (permalink) Old 08-08-2019, 02:18 PM Thread Starter
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And she's finally alive

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