Rebore necessary? - HCS Snowmobile Forums

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Old 12-20-2011, 06:51 PM   #1 (permalink)
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Default Rebore necessary?

I have a set of Wiseco Pistions for a VMAX4 800. they are SK1175 and are .020 over.

VMAX 800 WITH 18MM WRIST PINS 789CC 65MM STOCK BORE
SK1173 = 789CC= 65MM STOCK BORE
SK1174 = 795CC= 65.25MM .010 OVER
SK1175 = 802CC= 65.5MM .020 OVER

My question is this:

can I use my stock cylanders or do i need to bore them out with these pistions? I've heard that since the cylanders are nicasal plated that they may not need to be bored out.
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Old 12-21-2011, 08:43 AM   #2 (permalink)
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if the piston is oversized then yes you will need to bore but you will loose the nickasil plating. you might be able to bore and get the cyl. replated but if the cyl. are good go get some stock sized pistons.
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