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Hey guys.
So ive searched a ton and cant find the answer. Im tying to figure out what size piston rings I need for my 1970 cb175. Anyone able to help me out here?
Thanks
-Max
Boring a motor to take oversized pistons is usually done as a repair but it is also a way to add capacity. Bigger pistons displace more gas and make more power - in simple terms.
Going from say stock to 0.5mm oversize is not worth the bother for performance, but is a good idea if the bores are worn and the motor needs to be freshened up a little. A 3mm increase would work nicely but there are not a lot of bigger pistons for those bikes.
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