I have four of these machined sprags available. Reduces the rotating mass of your flywheel decreasing stress on the crank. Fits on all SV650, DL650, SFV650 I've been using one for 2 years in my superbike with no issues. Machined sprag shown on the left compared to stock 2d gen and 1st gen sprags $87.00 shipped. PM for paypal info.