How many miles have you covered in that decade Rocket Racer, and how do you go on for a cush drive?
No idea the mileage but it would be negligible. I've worn out the engine 3 times and onto my third gearbox. The engine is just about to come down again. The engine is in a mild state of tune and on methanol
I dont run a cushdrive.
I do try and ride the bike with some sympathy so have not yet ever (touch wood) chernobled an engine but have been showered with a competitors crankshaft. I normally keep the engine around 4-5k on the starts and the bike does lift its front wheel briefly even with me forward.
I have bought a belt for my (road) road rocket and will be interested to see how the front drive survives long term.
My race crank has always had worn splines on the shaft so I do locktite the pulley on. I havent snapped it yet.