What causes Throttle body sync causes rough idle/surging on the Bmw R 12 Ninet?

Test idle smoothness, listen for hunting at low RPM Estimated fix cost: $150-$300

What causes Final drive spline wear and oil leaks on the Bmw R 12 Ninet?

Inspect rear drive for oil seepage, check service history Estimated fix cost: $400-$900

Look for oil residue on fork legs below seals Estimated fix cost: $200-$450

Confirm ABS light extinguishes after startup test ride Estimated fix cost: $500-$1200

Known issues to inspect before buying a used Bmw R 12 Ninet. What to check and how much repairs cost.

MODERATE

Test idle smoothness, listen for hunting at low RPM

Fix cost: $150-$300

SERIOUS

Inspect rear drive for oil seepage, check service history

Fix cost: $400-$900

MODERATE

Look for oil residue on fork legs below seals

Fix cost: $200-$450

SERIOUS

Confirm ABS light extinguishes after startup test ride

Fix cost: $500-$1200

☐Check for rear final drive oil leaks

☐Confirm smooth idle with no surging

☐Verify ABS and traction control function

☐Request full dealer service history records

Generally solid, maintenance-dependent, watch final drive