Street Tracker
Dirt Track Mentality
I have been figuring out how to complete the disc brake conversion with the little time I have had lately. The brake lever shaft that goes through the frame, I knew were different from the drum to disc. I had picked up one on ebay a while back and here are some picture of the two side by side.
You could modify the drum brake lever shaft to work by cutting it and adding an hiem joint rod assembly to go up into the master cylinder but I chose to just change to the disc brake lever. The other thing you will have to deal with is the brake lever stop that holds the pedal in position is rotationally located in the same place but with the offset in the lever arm the side to side is different, the adjusting screw bracket on the frame will not meet up with the brake lever at the stop location. Even if I were to place the master cylinder directly against the frame it still would not make it which would not be good, I chose to leave 1/8" space between the master cylinder and the frame. So I will have to make a new bracket for the adjusting screw which is no big deal but not something that I have read about in doing searches here on the conversion to disc brakes.
I have also made brackets for the master cylinder that are just like the stock mounts to weld to the frame 1/2" diameter stock by 1-3/8" long drilled for the bolts to go through no pictures of those yet. I will cut the return spring stud off its current location and weld it where you see the spring hanging down. The return springs are different and the brake light switch spring are in different locations as well. Pregrid had drilled a hole and placed a nutsert and bolt on his for the return spring. Having never seen one or have a setup to look at I want to thank Pregrid for all of the great pictures on his build thread. They have proven to be very helpful for me, thanks Dave
Should have some good time the rest of this week and weekend to get some stuff done. Still trying to finish the garage up also I am getting all of my tools like the drill press, grinder, vise and welder all mounted on stands so I can use them. Then I can do all of the frame modifications, fabricating battery box, and drill the rotors out.
You could modify the drum brake lever shaft to work by cutting it and adding an hiem joint rod assembly to go up into the master cylinder but I chose to just change to the disc brake lever. The other thing you will have to deal with is the brake lever stop that holds the pedal in position is rotationally located in the same place but with the offset in the lever arm the side to side is different, the adjusting screw bracket on the frame will not meet up with the brake lever at the stop location. Even if I were to place the master cylinder directly against the frame it still would not make it which would not be good, I chose to leave 1/8" space between the master cylinder and the frame. So I will have to make a new bracket for the adjusting screw which is no big deal but not something that I have read about in doing searches here on the conversion to disc brakes.
I have also made brackets for the master cylinder that are just like the stock mounts to weld to the frame 1/2" diameter stock by 1-3/8" long drilled for the bolts to go through no pictures of those yet. I will cut the return spring stud off its current location and weld it where you see the spring hanging down. The return springs are different and the brake light switch spring are in different locations as well. Pregrid had drilled a hole and placed a nutsert and bolt on his for the return spring. Having never seen one or have a setup to look at I want to thank Pregrid for all of the great pictures on his build thread. They have proven to be very helpful for me, thanks Dave
Should have some good time the rest of this week and weekend to get some stuff done. Still trying to finish the garage up also I am getting all of my tools like the drill press, grinder, vise and welder all mounted on stands so I can use them. Then I can do all of the frame modifications, fabricating battery box, and drill the rotors out.
