What causes Cam chain tensioner rattle on startup on the Triumph Bonneville Newchurch?

Cold start noise, listen for ticking or rattling Estimated fix cost: $150-$400

What causes Carb diaphragm cracking causing poor running on the Triumph Bonneville Newchurch?

Flat spots on acceleration, inspect rubber diaphragms Estimated fix cost: $80-$200

Check chain slack, sprocket tooth hook or wear Estimated fix cost: $120-$250

Known issues to inspect before buying a used Triumph Bonneville Newchurch. What to check and how much repairs cost.

MODERATE

Cold start noise, listen for ticking or rattling

Fix cost: $150-$400

MODERATE

Flat spots on acceleration, inspect rubber diaphragms

Fix cost: $80-$200

MINOR

Check chain slack, sprocket tooth hook or wear

Fix cost: $120-$250

☐Check for oil leaks around rocker covers

☐Test ride for smooth carburetor response

☐Inspect frame for crash damage or repairs

☐Verify service history and valve clearances done

Solid classic, well maintained examples very dependable