piston needs replaced . We have off the rod and trying to figure out if it is stock bore or not . It has a 5w stamped in it . Have not had a caliper on it yet . What size is stock and any advice on how far oversize we can go ?
Not trying to go fast , just another 4 wheeler to get around on .

Thank you for your help

 

72mm (2.8346) is the stock bore. The 5w designates a stock Polaris piston. My opinion I'd go with a Wiseco forged piston kit. First over on Wiseco (.50 mm-.020) should be sufficient in most cases to clean up the stock bore.Wiseco goes up to 2 mm over stock bore.A few other brands offer increments of .25mm (.010) at a time if you go with something other than Wiseco.


Part Number Price Boresize OverSize Attributes
536M07200 $128.00 72.00mm STD
Displacement:
244cc
Stroke:
60.00mm
536M07250 $128.00 72.50mm 0.50mm
Displacement:
246cc
Stroke:
60.00mm
536M07300 $128.00 73.00mm 1.00mm
Displacement:
248cc
Stroke:
60.00mm
536M07350 $138.00 73.50mm 1.50mm
Displacement:
249cc
Stroke:
60.00mm
536M07400 $138.00 74.00mm 2.00mm
Displacement:
251cc
Stroke:
60.00mm