New front brake master cylinder rebuild kit for many Honda motorcycles from the 1980’s thru the 2000’s including Honda CB/CX/GL/VF500/650/700/750/900/1000/1100 - 1981-1987 (see list below). These parts are sourced from oem manufacturers and include all parts needed to rebuild the master cylinder. Replaces oem p/n 45530-MA5-671. The piston measures 15.80mm x 41.20mm long. Also included is “Red Rubber” assembly grease which is important to prevent the umbrella seal from folding over or binding during assembly. (Generous amount of grease included). Using brake fluid as an assembly lubricant is problematic as it cannot always provide the lubrication necessary to prevent the seals from folding over or binding during assembly. (Remember, brake fluid is not a lubricant!) Furthermore, Red Rubber assembly grease is specifically designed for use in brake and clutch systems where hardening or swelling of rubber must be avoided. It is manufactured from castor oil and a bentone thickener with red dye added for identification, and with additives for corrosion and oxidation resistance. It meets Lucas Girling TS-2-34-04 automotive brake specification. Coat all parts with this assembly grease before you put everything back together (see picture) and you’ll be ok. Free shipping within the USA. Shipping cost to Canada is $8.00. Shipping cost to all other countries is $12.00. Paypal accepted.