That reminds me of the time when I was a kid and I built my first motorbike.  It was probably the late 1960s.  Some of the local guys used to take a 20 inch bicycle frame and mount a motor between their legs and run a Maytag dryer pulley around the back rear rim. The only clutch was an idler pulley with a spring.  Even though I was young, I thought I could make one of my own.  The problem began when I put a banana seat on it and the back mounts on the seat ran down to the rear axle and were held on by a nut.  For some odd reason, one or the nuts on my seat never got tightened.  I had a friend pull the bike with my moped to get it started.  I didn't have any throttle cable run yet, so I had to run the throttle with my hand on the carburetor.  I finally got it running with one hand on the engine and one hand on the handle bar.  I threw the rope off and I was on my own for about 200 yards.  That's when the nut that was holding the seat on vibrated off the axle.  The back support of the seat came off and jammed through the spokes of the rear tire causing an immediate malfunction - haha.  The bike laid down on the road and I slid with it for a little ways.  I picked it up and as I was pushing it home, the back tire blew out.  I guess it was because of the sliding on the road.  That was the first and the last time I ever rode that bike.  But it was all worth it because for 200 yards I felt like a million bucks!
-Dwayne

This may help. 1946 cushman clutch pedal.
Dwayne

Hi guys,   Can anyone help me with a year for a H8647E engine I got last week?
Thanks
 Dwayne

Hi everyone,
    I finally had my '41 running the day before Portland. We had to push it around more than I rode it.  But after some adjusting, it runs pretty good now.  My son and I had a great time on the Sunday we came out.  It was nice to meet some of the group.  I hope to see you all again next year.  Rick, did you get the gun you were after in PA?  We just had our local meet this weekend at the Hartville Marketplace and had about a 10 mile ride.  It was fun to be able to ride with my son since both bikes were running.  I have attached some pictures of my '41.
Dwayne

No, Rick, I'm no where close yet.  I live about 4 1/2 hours from Portland and hope to have it there this summer. We can always dream....

Don't keep the electrolysis on too long it will eat pinhole leaks through the tank. Don't ask me how I know.

It's time for me to make my exhaust for my '41.  I'm making it out of stainless steel and would appreciate the outside dimension of the muffler and pipe and the length of the muffler.  Hope to have two bikes at Portland next year! thank's Dwayne