Triumph BSA 5-Speed Gearbox Sprocket Nut 57-4396 1973-82 T140 T150 T160 TR7 Repair M Part number is 97-1870

M Part number is 97-1870 or H1870

New Late BSA Unit Twins Rear 3/8" Cylinder Head Bolt

Replaces part number 57-7052 and T7052

Triumph Twins Rear Brake Rod Adjuster Roll Pivot Pin

Triumph BSA 5-Speed Gearbox Sprocket Nut 57-4396 1973-82 T140 T150 T160 TR7 Repair M Part number is 97-1870Triumph 5 Speed Twins & Triples Gear Box Sprocket Nut. If your gearbox sprocket nut is damaged beyond use, then you need to purchase this part. No more working with a nut that should have been replaced last overhaul. Accepts an 1 13 16" socket with a thread pitch of 28 TPI. Fits all Triumph 5 Speed Twins (Bonneville, Tiger, T140, TR7, Etc) from 1973 1982. Also fits Triumph & BSA 5 Speed Triples (Rocket III, A75, T150V, & T160) from 1973 1976. Please