1996 400L sportsman top end rebuild - Polaris ATV Forum
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post #1 of 2 (permalink) Old 11-20-2010, 09:58 PM Thread Starter
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1996 400L sportsman top end rebuild

Hello all. New to the forum. Have a 96 400L Sportsman and need to replace top head gasket. While having it apart, thought I would pull the head and change rings. Cylinder walls look good but had a very small score on the cylinder wall. I see you can order rings and piston that are standard, .010, .020 , .030 and .040. Are these the different sizes that are the bore size if you had to bore the cyclinder wall. If I have cylinder wall bored, I would have the machinest use one of these bore sizes listed above? Thanks in advance for your help.
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post #2 of 2 (permalink) Old 11-21-2010, 06:50 AM
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i let the machine shop pick out the size of the piston, let them do the work. you may want to specify a wiseco brand piston, they seem to hold up better
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