Timing Chain - Yamaha MA190 Service Manual

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Chain
Appropriate
gap
Rocker
Rocker shaft

4-3-8 Timing chain

Disassembly/reassembly:
1 Disassemble recoil starter/housing.
2 Disassemble fuel tank.
3 Disassemble ignition coil, flywheel.
4 Disassemble muffler.
5 Disassemble air cleaner.
6 Disassemble carburetor.
7 Disassemble throttle control lever.
8 Disassemble cylinder head cover.
9 Disassemble crankcase cover.
Timing chain
Disassembly:
1. Refer to pages 17–18, loosen the valve
adjusting bolt, and make an appropriate
gap between the valve stem end and the
valve bolt.
2. Pull out the rocker shaft and remove the
intake rocker and the exhaust rocker.
Rocker
38
4-3 Engine

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