I Had A Gpr On My 01 Yz 250, And My 05 Rm 250, I Think The Gpr Was Junk Along With The Post (which Was Aluminum And I Had To Drill & Tap Holes On Each Side Of It For Set Screws To Keep It From Moving) When I Did Get It Mounted Securley The Post Flexxed Too Much Anyway. Now I Have A Scotts With A Steel Post Which Is Lightyears Better, Plus The Damper Is Also Better, I Think The Gpr Was Actually Working Against Me & Promoting Arm Pump. But The Scotts On The Other Hand The Scotts Is Great & Very Adjustable. Plus I Like The Fact That You Can Control The Range "sweep" Of The Dampining. Try A Scotts, Its Worth The Extra I Promise.