Assembling the chainring
- used anti-seize compound before assembly ( Permatex Anti-seize Lubricant #80078 )
- torqued down using pins in the holes and a long bar.
Pins are 4mm, I used #10 screws
I used a long combination wrench. The loop prevents the bar from slipping off.
The chainring is fastened to the motor by screwing down the chainring cap. Both the chainring and cap are aluminum, is common for aluminum threads to gall and seize so I put a dab of anti seize on the threads before assembly, NOT grease. Antiseize has powdered metals in suspension to prevent galling. I used Permatex Anti-seize Lubricant #80078. I had a large jar on hand, you can get a small tube at auto stores or hardware stores which is more than enough for assembling the cap, axle, everything.
CYCmotor provides a poorly designed tool for torquing down the cap. You can’t measure torque and your hand can slip off the angled tool. I have bashed my knuckles too many times on cheap tools, no way was I going to depend on it.
I put pins in the holes and used a bar to torque down the cap. The hold are 4mm. I used #10 machine screws because they were on hand and fairly snug. The bar was a long combination wrench because the loop absolutely guaranteed the wrench would not slip off. (slip = bashed knuckles) I estimated the torque by feel.
I compared using their tool and the long bar. I torqued it down hard as possible with their short tool. Penciled a mark across the mating surfaces. Then I loosened and re-torqued with the long bar, and was able to move the chainring cap past the previous mark.
In my opinion the chainring cap is a poor design with 5 blind holes for tightening instead of 6 holes. If it has 6 holes it would be easy to make a better tool, just go across the diameter of the cap. But you can’t just add another hole. They are blind holes, and the inside of the cap has 5 little steps so the holes don’t go through. There is absolutely no reason to have individual steps instead of an entire ring around the inside. I think it’s to show off their machining and make things proprietary, and then they give you a poor tool because there are 5 holes.
I measured the bolt hole diameter to be 64.77 mm. I think it is 65mm allowing for errors. I measured between the hole outer diameters and inner diameters, and added the two. Done. Simple. If you have digital calipers (about $20)
