Piston clearance

sledr4life · Nov 23, 2013

I have a 2001 800 summit and we are trying measure the used cylinder against a new piston for clearance.

I am using a single ring SPI piston SM-09145 that measures 3.2226 and the cylinder measures at the bottom 3.2264. if I am doing the math right that is a clearance of .0038 which would be according the manual too tight.

I am using a bore guage and micrometer for the measurements.

Can anyone confirm the piston part number from SPI and if the I am measuring this correctly.

Thanks,
m

eddy · Nov 24, 2013

Clearance

Take the measurements in several places to insure you are getting good numbers. The shop manual show the places. If you show it to be close to .005" it should be good to go. My experience has been if the ring end gap is correct and you do not push it and get it to hot on break in you will be OK. Be real careful to warm it up a few times after initial start up and let it cool each time.

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Piston clearance

sledr4life

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eddy

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