Chipper's Vintage Open Class Powell
- Thread starter chipper
- Start date
I was able to spend most of Saturday in the shop , I fully assembled the Powell for testing purposes ( good thing I did ) , I had previously completed the engine build but had not ran it . I assembled the driven unit which is a Cat 99 series asymmetrical 5/8 belt , as I don't have the matching driver I shimmed the driven open 1/8" to handle the 3/4" belt to use a 30 series driver
, I also locked the driven to not open . The header you see was an old one I had made and it is temporary , I used the 26 mm flat slide OKO on this build and got the really slick CNC throttle assembly
I had an old seat ( P.O.S. ) to use for a test ride . Also set up return spring for the foot brake lever , full mock up was needed to figure out where to cut the brake arm and reposition the foot pedal so now that task can get under way .
, After running the engine , and she fired right up and ran great after I had fuel pouring out of the carb like a geyser , had to open up the OKO and adjust float tang . Next step was to install TAV and chain . So at this point it was time for a test ride . I made it about 200 yards and slung the chain which didn't seem possible as I take great care in perfect alignment ?? Well I look down and the driven is sliding off the shaft ?
:doah: The original tav cover went over the threaded stud on the shaft likely with some sort of washer / bushing between the driven unit and the cover with the flanged nut on the outside of the cover . Well guess what the driven spins counter clockwise and that's the same direction the keeper flanged nut spins off when the driven grabs ahold of it , lmao . If you look at the threaded end of the shaft it's in poor shape to begin with so today my machinist buddy is going to cut left hand threads in it for me and that will take care of it ! So last night I fully disassembled the bike and in all honesty Once you figure out this Powell it truly is a very simple bike to work on !
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I believe I solved my problem keeping the driven unit in place , went a different way than originally planned , my machinist made me (2) a custom brass step bushing , 1/4" hole to go over the stud then 5/8" inside to go over shaft then 3/4" o.d. and .010 clearance from the driven , should work great , I have the bike reassembled for testing this weekend and have formulated my TAV cover !
