This is a seals intact, pistons functioning optimally, and bore undamaged rear brake master cylinder, Distance Between Fixing Holes:45mm/1.8″. Compatible with model of Yerfdog GX150 150cc Compatible with Xmachine 125 2008 Hyosung gt250r 2006 Arctic Cat 400 4×4 FIS honda 200x 1982 Honda ATC-250R 1977 Yamaha R-D 400 Suzuki GSXR 600 GSXR750 2006-2010 and many other model. Compatible with precisely into the brake system just like the OEM parts do. This master cylinder is made from lightweight and resists rust and corrosion material. If there are any quality problems, please contact us to replace the goods. Please Check The Size Before You Buy It. REAR BRAKE MASTER CYLINDER THE SEALING IS GOOD THE PISTON FUNCTION IS THE BEST AND THE DISTANCE BETWEEN FIXING HOLES IS 45MM/1.8 MADE OF LIGHTWEIGHT MATERIALS ANTIRUST AND ANTICORROSION