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Old 03-14-2010, 09:37 PM
ZRTMWA ZRTMWA is offline
Motorized Bicycle Elite Member
Join Date: Feb 2010
Location: Baltimore, Maryland
Posts: 142
Default Re: Simulated Break In Period

Originally Posted by Vistaman73 View Post
I brought that up. We know you would never do that. But when we keep putting reasons out there we start talking to whoever is listening not the original poster. It just gets put out there for all to see. I agree, manufacturers make break-in seem a drag but if you just take the first 10-20 miles easy and once you make sure its "all good" just ride it.
Yeah sorry, I guess I just started to assume all posts were directed at me.

Originally Posted by chrisme View Post
FWIW I did follow the break-in somewhat closely(ish). For the first tank and a half I kept it under about 20mph, but wasn't afraid of going WOT up hills and whatnot, just not over 20. Going WOT up hills is going to help the rings seal better to the cylinder wall. But no high RPM to hurt bearings, etc. After 2 tanks I switched from 24:1 oil mixture to 36:1. I never did 16:1, that's if you're running 30 weight engine oil in the gas.
After probably 500 miles I switched to synthetic oil and 50:1 mixture which gave me a performance boost.
Now with well over 3000 miles on the engine, it has no issues at all. I'm running a slant head, I've filed it down a bit for even higher compression, and everything is great! Still just as high compression as ever, no bad bearing sounds, just smooth running.
Sounds good! I've got the slant head too and plan on running it 24:1 on break-in. I doubt mine will go 3000 miles without any issues considering all the issues I've had already with building it...
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