Question about 2007 Buell Firebolt XB9R

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Belt vibration I've owned a few twins and they all vibrate but the Buell is the most vibratingest of all and I love it! First let me say what a great resource the forum is. I've spent hours reading up here and it's helped with a lot of questions. I still have one or two though so here goes with one of them: At around 80-90mph it has a vibration that modulates around 90 times a minute. 'Listening' to what the bike is saying I think it is the drive belt

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And I'm guessing it's a harmonic with the engine because if I drop a gear it all changes. None of which is a problem to me if it's normal. I'm just concerned the belt might stretch under these conditions or may already be too loose. I can just turn the idler wheel against the belt but it's pretty stiff. What do you think? Anyone else noticed this?if it's an early belt en the tensioner/idler wheel is going turnable but it's're still ok. You should still have a few more miles in the belt. if it breaks, get the upgraded sprockets and belt.,,,

Posted on Nov 10, 2008


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