Poor Performance At High Speed - CPI GTR 50 Service Manual

TROUBLE SHOOTING

POOR PERFORMANCE AT HIGH SPEED

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