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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
YZ250wr Wont Start, Desperate
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[QUOTE="dirt bike dave, post: 1277054, member: 18302"] Good luck getting it sorted out. Those old YZ/WR's run very strong once you get it started. In my experience, stator failure on an old bike is more common than CDI failure. Over time, the stator wiring can break down, but still look fine from the exterior and still have some continuity. While the bike can generate a spark whicih you can see when you lay a plug on the side of the motor and kick it over, the spark may be too weak to fire in the cylinder. Stator re-winding is not terribly expensive (maybe $100 - $150), and might be worth a try before you buy a new CDI. While the reeds may have passed visual inspection, they may have lost their tension. It happens, and can really make for hard cold starting. Have you tried using staring fluid just to see if it will run? If it will start with starting fluid, I'd suspect a weak stator or reeds. If no go even with a blast of starting fluid, a new plug and fresh fuel, it would seem more like a CDI or woodruff key problem. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
YZ250wr Wont Start, Desperate
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