I've had 2 rear drums incorrectly machined from RGM !!
Not machined deep enough, so the side plates of the chain were running on the shoulder left behind after the sprocket was machined from 3/8-1/4!!
I brought this to Rodgers attention, but never heard back from him!!
The faulty machined sprocket put a twist on the chain! And made the teeth on the sprocket wear like a shark tooth on every other tooth!
This had me perplexed until I discovered the problem, I thought I had a twisted swinging arm!!
I hope this info is of some interest.
I machined the sprocket 1.5mm deeper and problem solved,
I told Rodger my findings and cure, but like I said no reply!!
A lot of wasted cash on 2 fecked brake drums and bearings,
No compensation from RGM!!
On the plus side the D.I,D 520 chain handled this abuse well, and that included a round trip to Italy
I think the Scott oiler saved the day, helped take some of the heat out of the chain, and kept it well lubed.
