Posted by Chuck(G) on April 07, 2002 at 16:32:12:
In Reply to: Re: Re: Lapping Pistons with Lava Soap posted by SousaStud on April 07, 2002 at 11:53:40:
If you've got a new horn or one with newly-redone pistons and they're sluggish no matter what you use for lube, then you may need lapping to remove just a bit of metal to make them move more easily.