2002 cr 250 piton size

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3/12/2019 8:49 AM

My cylinder had been accurately measured at 66.3 mm, what size piston should I get?

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3/12/2019 9:49 AM
Edited Date/Time: 3/12/2019 12:13 PM

Must not be a standard bore as a stock bore is 66.4 mm. Has the cylinder been sleeved?

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2018 KX450F
2005 KX250
2003 KDX 220
1984 KX 80
1982 RM 80
1980 RM 80
1977 XR 75
1969 Honda Mini 50

3/12/2019 11:32 AM

David_Darkes wrote:

My cylinder had been accurately measured at 66.3 mm, what size piston should I get?

Are the pistons not,
66.34 is a A

66.35 is a B

66.36 is a C

66.37 is a D

In the past what i know Vertex did have a E and F

66.40 is the end of the cylinder.

So the person who did the messure don't know what he is doing otherwise he would have give you the right piston.

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