Vento Phantom R4i - Chassis Troubleshooting

VENTO MOTORCYCLES
Rev no.01/ page 86of 84
Battery
discharges too
rapidly.
“Sulfation”acidic
White powdery
substance or
spots on surface
of cells
Battery
“Sulfation”
1. Dirty container top and sides.
2. Battery is too old.
1.Cracked battery case
2.Battery has left in a run-down condition for
a long time.
1. Too low or high charging rate.(When battery
is not in use should be checked at least once a
month to avoid “Sulfation”.
2. Left unused the battery for too long in cold
climate.
Clean.
Replace.
Replace the battery.
Replace the battery.
Replace the battery.
Replace the battery if badly “Sulfated”.
CHASSIS
Complaint
Symptom and possible causes
Remedy
Heavy steering 1. Steering stem nut over tightened.
2. Broken bearing/ball/race in steering
stem.
3. Distorted steering stem.
4. Not enough pressure in tires.
Adjust.
Replace.
Replace.
Adjust tire pressure.
Wobbly
handlebars.
1. Loss of balance between right and left
front suspension.
2. Distorted front axle or crooked tire.
3. Distorted front fork
Replace.
Replace.
Repair or replace.
Wobbly front
wheel.
1. Distorted wheel rim.
2. Worn front wheel bearings.
3. Defective or incorrect tire.
4. Loose axle nut.
5. Loose nuts on the rear shock absorber.
6. Worn engine mounting bushing.
7. Loose nuts or bolts for engine mounting.
Replace.
Replace.
Replace.
Retighten.
Retighten.
Replace.
Tighten.
Front
suspension too
soft.
1. Weakened springs.
2. Not enough oil in the fork,
Replace.
Replenish.
Front
suspension too
stiff.
1. Too viscous fork oil.
2. Too much fork oil.
Replace.
Drain excess oil.
Noisy front
suspension.
1. Not enough fork oil.
2. Loose nuts/nuts on suspension.
Replenish.
Retighten.
Wobbly rear
wheel.
1. Distorted wheel rim.
2. Defective or incorrect tire.
3. Loose nuts on the rear shock absorber.
4. Worn engine mounting bushing.
Replace.
Replace.
Retighten.