Triumph Spitfire Flywheel and Fittings
1500 Crankshaft & Flywheel
Some early Spitfire 1500's (Definitely USA models, possibly some UK) were originally fitted - at the factory, with crankshafts & flywheels that used 3/8” fixing bolts. (3/8” bolt part number 138526). All later models had larger holes & drillings (flywheels & crankshafts) to accept 7/16” bolts. (7/16” bolt part number UKC4254).
What crankshaft fits with what flywheel ?
Early type flywheels (TKC1186) with 3/8” diameter bolt holes CAN be fitted to crankshafts that have 7/16” drillings by carefully centre drilling out the 4 holes to 7/16” and using 4 later type bolts UKC4254. Later type flywheels (TKC1840) with 7/16” diameter bolt holes CAN be fitted to crankshafts that have 3/8” drillings by using one of our Bolt/Bush adaptor kits (RL1512), which include 4 (3/8”) fixing bolts, and 4 machined bushes (60070). Both early & late flywheels use the same locating dowels.