Reverse Decompressor Cam - Honda Motorcycle Service Manual

CYLINDER
HEAD
Reverse decompressor cam
The reverse decompressor cam is stationary during normal engine operation.
It
doesn't turn when the engine is being
started or when it is running. Its one-way roller bearing allows it t o free-wheel whenever the engine is turning i n the
normal direction.
But if the engine kickbacks during startup, the reverse direction locks-up the one-way roller bearing which moves the lobe
of the reverse decompressor cam into position (it opens the exhaust valve). The reverse decompressor cam automatically
returns to its normal position when the engine stops turning from the kickback.
RIGHT EXHAUST ROCKER ARM
(Opens the exhaust valve)
ONE-WAY ROLLER
PIN
Normal engine operation
Engine kickbacks during startup
Date of Issue. March. 1995
9-8
o
HONDA MOTOR
co
,LTD.