Over the weekend i bought a 1972 Speedway Green Horn. It was in a box, all taken apart, but mostly there. Unfortunately the bike was just worn out. I mean everything was worn. this thing got used! Came with the original HS50 motor (dated early 1972), which was also pretty worn.
I can deal with most of the wear issues. But I've never dealt with a Speedway front fork that was "loose as a goose" and just worn beyond usage. I had to come up with a way to deal with this. Unfortunately Speedway parts are pretty hard to come by, so had to do some adapting to make it work.
This information should apply to all Speedway front forks. But the measurements may be different for the 10" wheel models (I'm using a 14" wheel Green Horn for this example.)
First up you will some parts...
(1) Bronze bushing 1" ID 1.25" OD 2.5" length. Mcmastercar #6391k45
(2) Buna-N Rubber U-Cup Seal for 0.282" Groove Width, 0.955" ID x 1.545" OD x 0.25" Wide. McMastercar #9691k57
(2) old and used Rupp 1971-1975 Front fork strut bushings #17496. The more used, the better.
First need to get the old Speedway forks apart. Mine were tough birds. the original nylon bushing inside was jammed in there (and destroyed), and made taking the forks part difficult. In theory unscrew the fork cap and side the fork apart. then there's a large threaded bushing at the end that allows the parts to come off the upper strut. There should also be a spring in the lower strut.
The original Speedway nylon fork strut bushing. My that's pretty screwed.
I can deal with most of the wear issues. But I've never dealt with a Speedway front fork that was "loose as a goose" and just worn beyond usage. I had to come up with a way to deal with this. Unfortunately Speedway parts are pretty hard to come by, so had to do some adapting to make it work.
This information should apply to all Speedway front forks. But the measurements may be different for the 10" wheel models (I'm using a 14" wheel Green Horn for this example.)
First up you will some parts...
(1) Bronze bushing 1" ID 1.25" OD 2.5" length. Mcmastercar #6391k45
(2) Buna-N Rubber U-Cup Seal for 0.282" Groove Width, 0.955" ID x 1.545" OD x 0.25" Wide. McMastercar #9691k57
(2) old and used Rupp 1971-1975 Front fork strut bushings #17496. The more used, the better.
First need to get the old Speedway forks apart. Mine were tough birds. the original nylon bushing inside was jammed in there (and destroyed), and made taking the forks part difficult. In theory unscrew the fork cap and side the fork apart. then there's a large threaded bushing at the end that allows the parts to come off the upper strut. There should also be a spring in the lower strut.
The original Speedway nylon fork strut bushing. My that's pretty screwed.