Oil Mod
Modifications to the cylinder head oil supply to prevent cam/follower damage are described on this web page. The most professional job, however, essentially duplicates the Honda Racing modification, which used AN-3 line, and is described in Tony Donisi's modification and illustrated in TONYSMOD.GIF. WordPerfect 6.1 (*.WPD) and Word 6 (*.DOC) versions are also available. This also describes how to add an oil pressure gauge. We recommend that you verify the oil pressure after doing an oil mod, since a few instances of low oil pressure after a mod are reported. (See OIL PRESSURE.)
DRP offers both the filter adapter and drill/tap styles. Price range $159.00 to $249.00. (prices unverified)
Why not just tee off of the oil pressure switch? Other list members have made pressure measurements at this engine point and have concluded that the pressure and volume is not sufficient to solve the oiling problem.
Brian Sydness's Oil Mod
"I decided to use the main oil galley method and steel brake line. I wanted a permanent installation that looked like a factory mod. My expenses were greater than others, mostly due to the additional tools required."
Bob Sunley's Oil Mod
"I decided to do the Landry/Schoeb full tubing mod as done by Brian Sydness. See my web page for details."
Dave Berkey's Oil Mod Kit
Dale Walker's Holeshot has apparently stopped selling this kit. It's unknown if Dave is still making it.