919 sloppy cush drive mod
I don't know if anyone else has been troubled by sloppy cush drives on their 919 / 900? On my old FZ750, rather than replacing the notoriously poor rubber cushes, I would pack them out with a few 1.2mm aluminium plates, bonded with 467 3M double sided tape (bonded to each of the wheel housing vanes of course), such that a hide mallet would be required for cush drive/sprocket carrier assembly, giving a much smoother drive train. I think I ended up with two or three plates on each vane!
It seems to me that the 919, with it's hefty torque and it's slightly on/off FI throttle response, is in need of a similar mod, as mine is very sloppy after only 10K miles. This time I have used some old adhesive backed 0.6mm Lexan polycarbonate labels I had kicking around, cut to fit (40mm x 60mm), folded and bonded over the wheel hub vanes. I'm hoping they won't creep too much, but they can't go far nor do any damage.
As an aside, my old Yamaha 250LC production racer had so much transmission slack, that it was possible to push start the bike without using the clutch, saving invaluable fractions of a second; the trick was to pull the bike backwards in gear to take up the slack; then on the drop of the flag, one step, leg over and away.... In the days of push start racing (we're talking 25 years ago), this gave me a massive advantage off the line and into the first corner, even against the 350's, which alas didn't often last the race.
Oh the sweet smell of silkolene synthetic drifting down the breeze, as I pick myself out of the gravel at Druids yet again....
Hornet 900 (919) 2003. Leo Vince SBK cans.