Today I finished modifying the swing arm I bought from H2Ken.
- Modified the tube ends for KZ900 needle bearing kit.
- Added tread inserts to the shock absorber mounting holes (M10 x 1.25).
- Added holes with tread inserts for a "torque stopper" to prevent the caliper bracket from rotating (M8 x 1.25).
Here is a bunch of pictures from the process.
Outside boring, if you can call it that. Have to go carefully because when running the mill in reverse there is a chance the boring head might unscrew from the arbor.
This modification is done in order to be able to use the seals from the KZ900 bearing kit.
Coaxial indicator for centering the spindle over the tube.
Had to go into the weld on the left side. For some reason the early H2 swing arm is unsymmetrical.
Testing the fit of the KZ900 seal.
The swing arm has now been anodized natural (no color) and I'm ready to start on the tread inserts for the shocks.
I had to take the counter bore tool apart to be able get to the hole.
Using a temporary pin to drive the counter bore sleeve.
Success, the inserts are in place.
Trying the bolt. I need to buy some slightly longer ones.
The insert sticks out 1 mm on the back. I didn't want to use a shorter insert because the next size down is 5 mm shorter.
Next up was making a drill guide for the "torque stopper" holes. I did that because I had to drill the holes using a cheap wobbly 90 deg gear head thingy on my drill motor.
The tool registers in the axle slot so it can easily be removed and reinstalled.
First up is 4mm pilot holes.
The guide was then re-drilled in my mill and then used again for guiding the tap drill for the Timeserts.
Counter bore finished and ready for tapping. Plenty of meat inside there.
The guide went back into the mill for tapping. That way I could use it as a guide for tapping the holes in the swing arm.
Inserts are in place, perfectly positioned and perpendicular.
I'm gonna use two countersink bolts to attach the "torque stopper".
I'm not going to press in the bearings until I'm ready to mount the swing arm on the bike, just in case I have to make some adjustments.
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