Emgo front brake master cylinder with 10mm left hand thread (Yamahas backwards thread) mirror mount and brake light switch.For 7/8" bars.
Uses standard 10mm banjo bolt not included.
13mm piston diameter.
Made for Yamaha XS 650 1977-1984.
Will also fit many Yamaha street and dual sport models from the mid 70,s to the mid 90,s.
This quality made part is made much better then the poor quality junk from China everyone is selling.
Bin# 34-37287.
REPLACES OEM PART # 3G1-25850-00-00