What causes Primary chain tensioner wear causes noise/failure on the Norton Commando 961?

Listen for rattling on cold start at idle Estimated fix cost: $300-$600

What causes Oil leaks from crankcase and rocker boxes on the Norton Commando 961?

Inspect gasket surfaces for seepage or staining Estimated fix cost: $150-$400

Test all lights, gauges, and starter function Estimated fix cost: $100-$350

Test all six gears firmly under light load Estimated fix cost: $200-$800

Known issues to inspect before buying a used Norton Commando 961. What to check and how much repairs cost.

SERIOUS

Listen for rattling on cold start at idle

Fix cost: $300-$600

MODERATE

Inspect gasket surfaces for seepage or staining

Fix cost: $150-$400

MODERATE

Test all lights, gauges, and starter function

Fix cost: $100-$350

MODERATE

Test all six gears firmly under light load

Fix cost: $200-$800

☐Verify full Norton service history documentation

☐Check frame for cracks near engine mounts

☐Confirm recall and warranty work completed

☐Cold start test before any riding

Charming but high-maintenance boutique British bike