Ohlins YA 535 Road & Track Shock Absorber - Yamaha FZ-09, MT-09, XSR900, Tracer 900, FJ-09. 542 lbs/inch spring. Adjustable compression and rebound dampening as well as hydraulically adjustable preload. Used about 250 miles. The poor stock suspension on these bikes is well documented and this is the premier fix. I'm finding at 72 years old I might be better off with a tamer bike. Buy this top end suspension and when you are through with it return to stock and sell the Ohlins. Your out of pocket after resale of the Ohlins will be almost nothing. This shock new is $1100. Buy this one for $700. Shipping available at buyer expense.