Faults:

Battery died a month after I bought the bike. Carbs needed cleaning at the same time - only normal I guess for a very original bike.

My Yamaha service centre installed a new battery, new fuel filter, and then stripped the carbs, cleaned them and then rebuilt them with new jets etc. and removed the 100bhp limiter. It now has approx 125bhp (so the Yamaha mechanic says!). I think it now has a real 100bhp at the rear wheel.

General Comments:

Very fast accelerating bike with reasonable handling considering its weight, low foot pegs and exhaust.

I highly recommend this bike, its my second bike (first was a ZZR-250) and it is very easy to ride. I've gone from 34bhp to 125bhp in one step and haven't had any problems or falls, drops etc.

Only inconvenience is the small fuel tank, which limits my antics to 130km between fuel stops... yes, I do like accelerating full throttle all the time.