Honda CM400A - Poor Performance at Low and Idle Speeds

. .
WONDA
TROUBLESHOOTING CB400T
POOR PERFORMANCE AT LOW AND IDLE SPEEDS
Possible Cause
1. Check ignition timing INCORRECT c (1 1 Valve clearance incorrect
(2) Ignition timing incorrect (Defective
CORRECT
C.D.I. unit or A.C. generator)
f
2. Check carburetor pilot INCORRECT 9 (1) Fuel air mixture too lean (To correct.
screw adjustment. screw out)
(2) Fuel air mixture too rich (To correct,
CORRECT screw in)
3. &heck for air leaking LEAKING 9 (I) Deteriorated insulator O-ring
(2) Loose carburetor
NO LEAK
4. Try spark test.
WEAK OR INTERMITTENT
- (1) Faulty or fouled spark plug
SPARK
(2) Faulty C.D.I. unit
(3) A.C. generator at fault
(4) Ignition coil out of order
19-4
Date of Issue: September, 1977
O HONDA MOTOR CO.. LTD.