1973 Yamaha CT1 Service and Repair Manual

A 1973 CT1C is serviced from LIT-11613-14-01, the multi-model manual Yamaha published for these two-strokes.

Fitment at a glance

Model years 1971 to 1973. Models: AT1, AT2, AT3, CT1, CT2, CT3, LT2, LT3 and the CT1C itself. The code on your frame is what decides which notes apply, so check it before working to a specification.

The manual is laid out for bench work. Engine and gearbox disassembly in sequence, service limits for the parts you will be measuring, carburettor jetting and ignition settings, torque figures, wiring diagrams and troubleshooting tables. There is no filler in it; Yamaha wrote it for people who were being paid to fix these machines, and that is precisely what makes it useful half a century on.