Posted by David on January 15, 2003 at 00:17:04:
In Reply to: Re: Re: Lapping valves on 45-SLP posted by Daniel C. Oberloh on January 13, 2003 at 16:56:35:
Depends on whether you know what you're doing or not. I do and did just that to my new horn a little over 2.5 years ago. Made all the difference in the world. I now have great valve action where before it was just so-so.