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So I made up a jig from the existing modified frame to be able to replicate the perfect shock position and hold all the pieces in place while being welded back together.
The jig is in place in the frame to be modified and starting the mock up to tack weld pieces back in place.
The upper sub frame and seat mounting position and rear fender mount were raised 1 inch from stock position. To allow for the longer suspension travel in the rear. To achieve this, the upper frame rails were cut off and turned upside down where they attached to the main backbone.
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The new shock position is welded into place with new chromemoly tubing.
Checking the fit of the shocks, and the swing arm before final welding is done.


You are an artist!
not quite art yet, still a little rough. but it will be art when finished.
Test fitting up some more parts to make sure everything fits properly and to locate bracket attachment points to attach the parts before I go any further with anymore welding.


Making all the brackets and tabs to mount the tank, seat pipe and silencer.
Since the complete rear subframe section is moved up, 1 inch from stock, I have to move the lower tabs for the straps to hold down the lower part of the number plate. They also had to be moved up 1 inch.
Impressed with your engineering process, skills and desire to make a bike that reflects the golden era of moto. Wish i still had the mxa mags from the 70s. As a kid i lived by Saddleback and cut school to go ride and watch the pros, bikes were always so cool.
I had a 77 CR125, but at the time my dreambike Maico 250.
Pit Row
Post a reply to: 1977 Mugen 125 # 12 Steve Wise replica build