Of course, everyone's opinion on this will vary, and just because I ran my motor for 2 miles, let Steve wring its neck on the dyno, and it then continued to make upwards of 66hp for two years with just piston ring changes at around 2000 miles, neither of us are saying this is how you should treat yours.
As with everything on this site, you need to interpret the information best you can for your given circumstances. You will find posts if you search that recount HRC's schedule for break-in of new components.
Personally I think there's a lot of crap talked about "running in" a modern 2-stroke, but that's just my opinion.
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Andy.
NSR-WORLD.COM
Please keep all responses to Forum posts on the Forum so that others may benefit.
Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.
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