Honda CM 185T 1981 Manual page 203

TROUBLESHOOTING CHART
POOR HIGH SPEED PERFORMANCE
1. Check ignition timing & INCORRECT T I M I N G &
valve clearance C L E A R A N C E
CORRECT T I M I N G &
C L E A R A N C E
RESTRICTED F U E L FLOW
2. Disconnect fuel tube at
carburetor and check for
clogging
UNRESTRICTED F U E L
FLOW
3. Check fuel filter, fuel valve, CLOGGED
& carburetor jet for clogging
NOT CLOGGED
CONDITION A G G R A V A T E D
4. Replace carburetor main jet
CONDITION IMPROVED
INCORRECT
5. Check valve timing
CORRECT
WORN OR BROKEN SPRING
6. Check valve spring tension
SPRING TENSION
CORRECT
SMOKING EXHAUST
BLACK SMOKE EMITTED
1. Run motorcycle a long
distance at high speed
T H I N EXHAUST EMITTED
2. Return throttle grip quickly WHITE SMOKE EMITTED
Date of Issue: December, 1977
© H O N D A MOTOR CO., L T D .
Possible Cause:
^ ( 1 ) Incorrect timing adjustment
(2) Incorrect valve clearance
(1) Empty fuel tank
(2) Clogged fuel tube
(3) Clogged fuel tank cap breather hole
(1) Clogged jet
¡2) Clogged fuel filter
(3) Clogged fuel valve
(1) Jet size too small
(2) If condition improved w i t h small jet:
a) Clogged air cleaner
b) Choke not opened fully
[1) Incorrect valve timing adjustment
¡1) Faulty valve spring
Possible Cause:
(1) Worn cylinder & piston rings
(2) Oil level too high
(3) Piston rings incorrectly installed
(4) Faulty piston or cylinder
(5) Flaws in cylinder head
(1 ) Worn intake valve guide or stem
(2) Deteriorated valve guide O-ring
18-5