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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
05 YZ250 Crank Seals
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[QUOTE="Bunya, post: 1229499, member: 77196"] I'd say that's a pretty clear sign that the seal needs to be replaced. The only question is what method you use to replace it. Many folks here have done them by the method your coworker suggested, with the exception that you use a couple of sheet metal screws, not a machine screw - the threads are way too small and it will just pull right out. You'll need a couple to work the seal out without getting it cocked too badly. Be careful not to nick the bearing when it breaks thru. Clean everything thoroughly to remove any debris left from drilling. A deep well socket can be used to drive the new seal in square and without deformation. It's a quick, easy way of doing it. On the other hand, you could go ahead and tear the engine down completely and split the cases. This method allows you to measure and inspect all critical components of the engine and gives an accurate assessment of condition. Everything gets thoroughly cleaned and eliminates any question of internal issues. The downside of course is a lot more time and money since you have to replace all the gaskets. [/QUOTE]
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Forums
Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
05 YZ250 Crank Seals
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