[Richard Farrant]

Originally Posted by Ganmain Tony

Chris, not trying to be condesending...but lap means - to grind (finely) the surfaces between the the feul tap and the body of the fuel tap it sits in.

It makes both surfaces sit evenly against each other thus preventing a fuel leak. As Mike has suggested, valve grind paste should work well.

Good call, Tony. We take these tasks for granted, I mentioned polishing paste, only to finish off or if the fit was not bad enough to require use of a fine valve grinding paste.