different stock spring rate Suzuki GSX-R600 01-03***325.5mm | 8.0kg/mm | 450lb/in Suzuki GSX-R600 04-05***332.5mm | 7.6kg/mm | 425lb/in Suzuki GSX-R600 06-10***320mm | 9.4kg/mm | 526lb/in Suzuki GSX-R750 00-03***325mm | 7.2kg/mm | 400lb/in Suzuki GSX-R750 04-05***332.5mm | 7.3kg/mm | 408lb/in Suzuki GSX-R750 06-07***320mm | 9.5kg/mm | 532lb/in Suzuki GSX-R750 08-10***320mm Suzuki GSX-R1000 01-02***329.5mm | 7.7kg/mm | 430lb/in Suzuki GSX-R1000 03-04***332mm | 8.6kg/mm | 480lb/in Suzuki GSX-R1000 05-06***325mm | 8.1kg/mm | 454lb/in Suzuki GSX-R1000 07-08***315mm | 10.1kg/mm | 566lb/in Suzuki GSX-R1000 09-10***320mm | 11.6kg/mm | 650lb/in Kawasaki ZX6R 03-04***340mm | 10.0 kg/mm | 560lb/in Kawasaki ZX6R 05-06***335mm | 9.7kg/mm | 543lb/in Kawasaki ZX6R 07-08***340mm | 9.2kg/mm | 515lb/in Kawasaki ZX6R 09-10***341mm Kawasaki ZX10R 04-05***338mm | 10.0 kg/mm | 560lb/in Kawasaki ZX10R 06-07***338mm | 8.3 kg/mm | 464lb/in Kawasaki ZX10R 08-10***338mm | 9.1kg/mm | 510lb/in Kawasaki ZX14 06-08***330mm | 9.7kg/mm | 543lb/in 02/03 yamaha r1 8.8kg/mm