Wayne sells a series 30 comet clutch which mounts on the engines crankshaft. Included in his kit, is a 6" series 30 driven clutch which is then mounted to a separate jackshaft, located/mounted using a pair of carrier bearings, that also includes a pulley, that pulley then via another belt, goes to the rear wheel. When I hear the term "TAV unit" I envision the TAV and TAV2 unit that's sold for use on mini bikes, etc., that incorporates/mounts the clutch to jackshaft unit on a single backer plate (I,e. like this photo) Waynes drive system (same as mine, but I did some modifications) uses a completely free, and separate mounting location for the jackshaft. (OTHER PHOTO) If you bought Waynes "kit", then my old cover should work with minimal mods/work to your bike. (need to drill a hole in the vertical brace,to mount, etc.) Sorry for any confusion if you/Wayne referred to his set-up as a TAV. The "TAV" unit pictured are the ones reported to have been problematic for our use, and also having been cheaply copied by others.