Handlebar
- Improperly installed or bent
Steering
- Improperly installed handlebar crown
- Bent steering stem
- Improperly installed steering shaft (improperly tightened ring nut)
- Damaged ball bearing or bearing race
Swingarm
- Worn bearing or bushing
- Bent or damaged
Rear shock absorber
- Faulty spring
- Oil and gas leakage
Tire
- Uneven tire pressures on both sides
- Incorrect tire pressure
- Uneven tire wear
Front fork
- Uneven oil levels on both sides
- Uneven spring tension (uneven damping force adjuster position)
- Broken spring
- Twisted front fork
Wheel
- Incorrect wheel balance
- Deformed cast wheel
- Damaged bearing
- Bent or loose wheel axle
- Excessive wheel runout
- Loosed spoke
Frame
- Bent
- Damaged steering head tube
- Improperly installed bearing race