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09-28-2009, 03:36 PM

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DarZeelon

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RE: Is it a phenomenon of these little 2-strokes that until well broken in, they will not turn a larger

Quote:

ORIGINAL: jaka

My experience is that modern ABN and ABC engines don't gain particularly much RPM at all, during and after running-in.
They are so good that they run and throttle perfect from the start.

Jan,

I can agree regarding OS ABN (ABL) engines, which are practically set up to run out of the box...

But as far as tight MVVS engines go; when last did you break-in an engine and continues to run it over several hours, observing the RPM?

I did it with several; both newer and previous generation engines from MVVS.
They all gained RPM substantially.

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