Poor Performance At High Speed - CPI GTR180 Service Manual

CPI MOTOR
II.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
CLOGGING
2
UNRESTRICTED FUEL FLOW
CHECK FUEL FILTER, FUEL VALVE
AND CARBURETOR JET FOR
CLOGGING
3
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
《 》
GTR180
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