I have owned my Norton for 37 years with over 140,000 miles and in that time I have been through 2 triplex chains then 4 years ago I put a RGM belt drive kit (steel kit) in with 2 gearbox adjusters and no clutch wobble, after 5,000 miles without any problems then all of a sudden I lost 3mm off the side of the belt, it was trying to run off the front pully plate, a new replacement belt, readjusted it and after a 2,000 miles the same thing happend and still no clutch wobble, still trying to run off the front plate, it was so bad that the belt retainer plate shatted in 3 peices, not happy, didn't break the belt just wore out 3 to 5 mm off the side of the belt.
Before this happened again I sent away for another belt kit for my other project bike (alloy kit) but ended on my bike to replace the steel kit, but after some time I just couldn't get it to run without the belt trying to run off the front pully, I spent 3 days reajusting and still the same resualts, so decided to go back to the chain drive, as I never had any problems with chains and I am still running my orginals clutch plates with early Ford tranny oil.
I found running a belt drive made no diffrents to running a chain, the bike ran just as smooth with both, but will be running a open belt on my project bike (1960 650 Manxman).
Ashley