Engine Break in after Rebuild

thanks a lot powerstrokerfan
it is probably more necessary to break in bearings and things of that sort that really move.
compression psi should be green not red.

Donthaveakawman what bearings? I'll be finishing up the shims tomorrow to get proper clearance. Then next checking the compression. I really need serious advice on how to break this thing in safely.

I think your worrying to much about it.If your that worried about it. Once you get it ready to run just let it sit and idle for a couple min with a big fan on it. Then baby it for a while the first 100 mi or so. Really the main things are the rings and cam bearings. Its really all just how you feel comfortable doing it. As youve read everyone does it diffrently.

For comparison with factory recommended break-in procedure for a brand new motorcycle.

This would be an ultra-conservative method for break-in following the reported engine work.














Varying the engine rpm while on the road is also recommended.
That is to say, don't hold a steady rpm for prolonged periods.

Good Fortune!

Break in procedure depends on what needs breaking! In a new motor we are talking bushings,bearings, gears, the whole works verses seating new rings. I admit I was a bit aggressive on my last rebuild. Started it and warmed it to get a few heat cycles, rode the snot out of it, changed oil and continue to do the same. Ride it hard a bunch change oil and repeat.
Wayne

Patton wrote: For comparison with factory recommended break-in procedure for a brand new motorcycle.

This would be an ultra-conservative method for break-in following the reported engine work.

Varying the engine rpm while on the road is also recommended.
That is to say, don't hold a steady rpm for prolonged periods.

Good Fortune!

Those RPM ranges with mileage were on the tachometer in a clear overlay on my new KZ750.

thanks dawg