Project Assembly

[shortshifter]

Yes Ji I would have loved to have been there but I had to work and all my bikes are in various stages of repair so I don't have any to ride.Do you still want Fruity's number?

[Ji Gantor]

Yes Please.

Ji

[Ji Gantor]

When the bearing inner races have their gallery and all 4 ports they should look like this.
This should now lubricate the bearings like their designer intended.

Ji

[Ji Gantor]

I do not recommend that anyone try this next step. Please do not modify any parts unless you have had an engineer check and certify that it will be structurally sound.

To lubricate the engine mount tube and the chassis interface I set the pivot pin into the drill press and drilled four 3mm dia holes right through the pin. This should allow the grease to get to the areas were seizure occurs and if we are lucky it should also prevent or at least purge water from the system.

Ji

[Ji Gantor]

To help the flow of oil and increase the  reservoir I have opened the exit ports on the pin.
This was done with a cylinder grinding stone fitted into a Dremel.
I did all the ports new and old.


Ji

[Ji Gantor]

I then deburred all the worked surfaces.
This pin should now get oil to where it is needed and should prevent seizure, not that that means I can now set and forget. It will still need to be serviced every year so I can see how it is going and change out what ever parts are worn.


Ji

[Ji Gantor]

To deburr the exit ports I used a countersink bit.
To clean out the inner bore of the pivot pin I used a spray gun brush.

Ji

[Ji Gantor]

The brass bushes that are inserted into the swingarm tubes may have to be honed so the new bearing inner rings will fit. As can be seen they have a spiral gallery that will bur when the old bearing inner rings were pushed out.

Ji

[Ji Gantor]

First test fit the new bearing inner rings and see if they slide in and rotate without any force. Mine will only go in half way before they lock. These brass bushes will have to be honed.
If the new bearing inner rings are sloppy in the brass bush, the brass bush will have to be replaced.

To find the tight areas try and rotate the rings and then remove. The tight areas will have scratches and these are the areas to focus on. Go slowly as brass is soft.


Ji

[Ji Gantor]

I honed my brass bushes with some 240 wet and dry sand paper.
It took a while but I only removed what was required.

Ji

[Ji Gantor]

Test fit the new bearing inner rings.
They now move freely and can be pushed right through the brass bush without any force.


Ji

[Ji Gantor]

The divider washers that sit between the swingarm and the engine mounting tube are badly grooved and need to be replaced. I have a steel bar that is the right diameter so off to the turning shed.

Ji

[Ji Gantor]

First turn the bar down to the correct outside diameter.
Then face the front.
Next I had to cut a taper on the face to match the existing ones.

Ji

[Ji Gantor]

Next I used a series of drills to create the bore of 19mm.

Ji

[Ji Gantor]

The actual bore is 20mm so I finished the hole with a boring bar.

Ji