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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
1989 yz125's
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[QUOTE="BSWIFT, post: 1219293, member: 16802"] Not real sure where to start. The crud is most likely just residue left from the two stroke oil. If the crank moves freely AND within specs, put the top end in and have fun. If you start cleaning it, you will likely need to split the cases and do a very thorough cleaning. If you don't dislodge any of the crud and you are within the specs you should be good to go. Have fun, you'll learn alot about your bike by working on it from the start. Good Luck and come back with questions as you need. Try the search function but don't use model specific questions unless a general question doesn't answer it. Lots and lots of info on top and bottom end work. Most of the info is not model specific, just technique and things to watch out for. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
1989 yz125's
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