I have a set of straight GSXR forks for the K4/K5 600/750 model (2004-2005). I'm pretty sure these will also work in the 06-07, but please check. Also a popular upgrade for Suzuki SV650. These have aftermarket internals: GMD 20mm dual-speed pistons, 0.95kg springs, and 10mm fork extenders. They have 5wt oil. Have receipts for the work. Never used after the refresh; was intended for a custom project but sold the bike before I did the swap. Asking $500 + shipping, or local pickup central MA Pretty sure I have a GSXR axle and calipers if interested