Question about 1987 Yamaha SDR

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I have a relatively new Bravo snowmobile with less than 500km on it. To date it has blown 2 sets of exhaust springs. (springs that hold the exhaust to the cylinder head) Just recently the the weld around the exhaust ring that fits over the cylinder head broke off leaving me stranded. Unfortunately the machine is no longer on warrenty and the Yamaha mechanic I talked to has never heard of this and has no idea what is causing the problem. I can't rely on this machine until I solve this problem. Any ideas

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Hi ....... Sounds like a stress fracture, something is moving relative to another thing which is UNABLE to move. Push & pull everything around the effected area then check ALL the mountings. If nothing is obvious lossen all fixings and re-torque to manufacturers recommendations. If you have a workshop manual look at all the engine mountings and see if any are rubber (or similar) types. Let us know how you get on.

Posted on Jan 06, 2009

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