ORIGINAL: rcdude7
ORIGINAL: BillS
One might guess that lapping compound was to assist in quicker break in.
Bill
One who does not know any better might guess that, the truth is that it will only ruin the fit of the piston and sleeve. A tight fit when cold is what you want with a ABC cylinder/piston.
I would send that engine back to where it came. Even if you manage to clean the compound out before you run it, there will still be some embeded in the piston and it will only shorten its life.
Maybe the engine you recieved was a return, sold to you as new.
Mike
The piston/ sleeve was lapped due tooling marks must be removed and fit togheter and the sleeve must be tapered to make the engine easy starting without loss of compression.
In case the piston was embeded with lapping paste, the piston was not cleaned free for lapping paste
before use.
Take contact with dealer about this problem. But in case you dismantled the engine, the warranty can be void.