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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
2 Stroke Rebuild or Not?
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[QUOTE="Jasle, post: 1224127, member: 26675"] you did good. you checked everything. Thats the first component. when its apart you might as well swap rings. that one is a no brainer if your already doing the labor depending on what piston you use its fairly cheap to do a ring and gasket set. Especially if your in there changing clips. I'd suggest a new base gasket also. odds of a leak are considerable after taking the cylinder off and trying to reuse the old one. For the circlips you can buy a special tool made just for installing them. or I grooved some mini needle nose pliers and I sort of make a twisting motion while putting them in. not too bad after you've done a few. I do a new topend and the break it in. I then check the compression every other race weekend. Make yourself a log book! Then when 90% of original I change rings and check piston clearance. No one can quote you a certain compression reading of when to change your rings. I've had 2 different testers back to back give 20lb different readings. I can usually get 2 sets of rings to one piston though. I have gotten 20ish hours out of a set of rings before the 90%. We mainly race mx, much of it at national levels. Taken a few top 3's and won some amateur national level moto's and we put several hours a week on the bikes. I noticed an improvment when we switched to Amsoil Dominator. but I still run 40:1 cause I'm wierd like that. We run 50's 60's 65's and 85's. I tend to push the 85 motors longer but as my rider has gotten faster in that class I have paid with failure when I've gone below 90% I've gone to 80% and then hung a ring!!! Much more expensive than just doing the topend. Not sure off the top of my head but I'd bet piston clearance for your 60 was right about .002" so when its apart check your manual and clearances. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
2 Stroke Rebuild or Not?
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