CPI MOTOR
TROUBLE SHOOTING
GTR50
《
2-5
》
POOR PERFORMANCE AT HIGH SPEED
FLOW PATH
BAD SITUATION
PROBABLE CAUSE
1
CHECK IGNITION
TIMING AND VALVE
CLEARANCE
CORRECT TIMING AND
CLEARANCE
INCORRECT TIMING
AND CLEARANCE
(1) INCORRECT TIMING ADJUSTMENT
(2) INCORRECT VALVE CLEARANCE
2
DISCONNECT FUEL
LINE AT CARBURETOR
AND CHECK FOR
CLOGGING
UNRESTRICTED FUEL
FLOW
RESTRICTED FUEL
FLOW
(1) EMPTY FUEL TANK
(2) CLOGGED FUEL LINE
(3) CLOGGED FUEL TANK CAP
BREATHER HOLE
(4) CLOGGED FUEL PETCOCK
3
CHECK FUEL FILTER,
FUEL VALVE AND
CARBURETOR JET FOR
CLOGGING
NOT CLOGGED
CLOGGED
(1) CLOGGED JET
(2) CLOGGED FUEL FILTER
(3) CLOGGED FUEL VALVE
4
REPLACE
CARBURETOR MAIN
JET
CONDITION IMPROVED
CONDITION
AGGRAVATED
(1) JET SIZE TOO SMALL
(2) IF CONDITION IS IMPROVED WITH
SMALL JET:
A) CLOGGED AIR CLEANER
B) CHOKE NOT OPENED FULLY
5
CHECK VALVE TIMING
CORRECT
INCORRECT
INCORRECT VALVE TIMING
ADJUSTMENT
6
CHECK VALVE SPRING
TENSION
SPRING TENSION
CORRECT
WORN OR BROKEN
SPRING
FAULTY VALVE SPRING
