Rc Valve - Honda CR125R 2006 Owner's Manual

Refer to Safety Precautions on page 19.
The exhaust valves open and close according to the engine speed to ensure sufficient torque throughout
the entire engine rpm range. The valves should be fully closed at low rpm and fully open at high rpm.
The exhaust valve system is a precision assembly. Before beginning inspection/decarbonizing, please
study the following text and illustrations carefully.
Before attempting complete disassembly, we recommend you consult the Honda Service Manual or your
Honda dealer. Mismatching of parts on reassembly can measurably affect fully engine performance.
(1)
(5)
(7)
(1) RC valves (2) valve shaft (3) valve stopper (4) valve rod (5) governor gear (6) governor spring
(7) primary drive gear (8) governor rack gear
(2)
(1)
(3)
(4)
(6)
(8)
(2)
(3)
(4)
(5)
(6)
(8)
(7)
Operating Inspection
1. Remove the B-clip (1) and setting collar,(2)
then remove the tie rod (3) from the valve
shaft arm.
2. Check that the exhaust valve (4) turns
smoothly. If the exhaust valve turns
unsmoothly, remove the exhaust valve and
decarbonize the RC valves and valve shaft
(page 56).
(2)
(3)
(1)
(1) B-clip (3) tie rod
(2) collar (4) exhaust valve
Servicing Your Honda

RC Valve

(4)
55