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Old 06-05-2012, 05:31 PM   #5
Roads Scholar's Avatar
Joined: Mar 2006
Oddometer: 264
RD Pistons

No it's not common practice, but there's no reason to redo a cylinder thats OK.
You may have pistons for two different models or someone modified a stock piston for higher performance.
That was common practice. The scored piston is exactly how we used to cut them in the 70s on racebikes. The numbers may be piston weights. What year is it? Was it raced?
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