KYMCO MXU 50 REVERSE - Page 36

1. GENERAL INFORMATION
1-33
ATV 50
ENGINE LACKS POWER
c Clogged air cleaner
d Clogged fuel filter
e Clogged exhaust muffler
f Faulty auto bystarter
g Faulty charcoal canister
c Faulty CDI unit
d Faulty A.C. generator
c Worn cylinder and piston
rings
d Blown cylinder head gasket
e Faulty reed valve
c Clogged carburetor jets
c Fouled spark plug
d Incorrect heat range plug
c Mixture too lean
d Poor quality fuel
e Excessive carbon build-up in
combustion chamber
f Ignition timing too early
c Excessive carbon build-up in
combustion chamber
d Poor quality fuel
e Clutch slipping
f Mixture too lean
Inspection/Adjustment Symptom
Probable Cause
Engine speed
increases
Engine overheats
Correct timing
Engine does no
t
knock
Plug not fouled o
r
discolored
Normal
compression
Not Clogged
Engine speed does
not increase
sufficiently
Engine does no
t
overheats
Incorrect timing
Engine knocks
Plug fouled o
r
discolored
Abnormal
compression
Clogged
Start engine and
accelerate lightly for
observation.
Check ignition timing
(using a timing light).
Rapidly accelerate o
r
run at high speed
Test cylinde
r
compression (using a
compression gauge)
Check carburetor fo
r
clogging
Remove spark plug and
inspect
Check if engine
overheats