525 Motorcycle Front Sprocket Pinion For Kawasaki ZZ-R600 ZX600 ZX-6R Ninja ZX636 Engine Parts Fit For ZZ-R600 ZX600 05-08 ZX-6R Ninja ZX6R 98-02 ZX636 2002 motorcycles; drive shaft spline; fits standard 525 drive chain Direct bolt on mounting design; aligns shaft tooth position; no extra during chain drive assembly Smooth polished tooth surface; reduces chain friction loss; maintains stable power output during speed riding hardness structure; supports frequent speed rotation; slows surface abrasion over long mileage Standard inner spline tooth dimension; size matching; keeps tight connection with front drive shaft