Yamaha WR45OFR Decompression system, Timing chain tensioner, Assembly and Installation

CAMSHAFTS

ENG

Decompression system

1.Check:

● Decompression system

Checking steps:

●Check that the decompressor cam 1 moves smoothly.

●Check that the decompressor lever pin 2 projects from the camshaft.

Timing chain tensioner

1.Check:

●While pressing the tensioner rod lightly with fingers, use a thin screwdriver 1 and wind the tensioner rod up fully clockwise.

●When releasing the screwdriver by pressing lightly with fingers, make sure that the tensioner rod will come out smoothly.

●If not, replace the tensioner assembly.

ASSEMBLY AND INSTALLATION

1.Install:

●Exhaust camshaft 1

●Intake camshaft 2

Installation steps:

●Turn the crankshaft counterclockwise until the “I” mark a on the rotor is aligned with the stationary pointer b on the crankcase cover.

NOTE:

●Apply the molybdenum disulfide oil on the camshafts.

●Apply the engine oil on the decompression system.

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