1976 Yamaha CHAPPY Service and Repair Manual

The 1976 Chappy, model code LB80IIAC, is documented in Yamaha service manual LIT-11616-00-07. That book was issued for the 1976 model year alone, so there is no ambiguity about which machine the procedures describe.

For a small machine of this age the manual earns its place through its specifications. Engine dismantling and reassembly order, wear limits and clearances, carburettor settings, ignition data, torque figures, wiring diagrams and basic troubleshooting are all set out in Yamaha's own shop format.

Check the LB80IIAC code stamped on your Chappy against the manual before ordering. Yamaha changed the model codes through the Chappy's run, and the right book is the one that names yours. The brake, wheel and frame sections are covered to the same level as the engine, with the fastener torques listed where overtightening would do damage. Parts for these machines turn up in mixed condition, so having the measured limits to hand decides what goes back on and what does not.