3. INSPECTION/ADJUSTMENT
3-7
ATV 50
CARBURETOR IDLE SPEED
Warm up the engine before this operation.
Start the engine and connect a tachometer.
Turn the throttle stop screw to obtain the
specified idle speed.
Idle Speed: 1800±100 rpm
When the engine misses or run erratic,
adjust the air screw.
《Ignition Apparatus》
Remove the A.C. generator fan cover.
(Ö8-3)
Remove the four bolts attaching the fan and
then remove the fan.
Warm up the engine and check the ignition
timing with a timing light.
When the engine is running at the specified
rpm, the ignition timing is correct if the “F”
mark on the flywheel aligns with the index
mark on the crankcase within ±1.5°.
Ignition Timing:
MX’ER 50: 22°±1.5°BTDC/2000rpm
MXU 50 REVERSE/MXU 50:
13.5°±1.5°BTDC/1500rpm
Throttle Stop Screw
Ai
Screw
Bolts
Index Mark
“F” Mark
• The engine must be warm for accurate
idle speed inspection and adjustment.
＊
The CDI ignition timing is not adjust-
able. If the timing is incorrect, check
the CDI unit, ignition coil and A.C.
generator and replace any faulty parts.
＊
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