Harley-davidson Dyna Fat Bob Common Problems
Known issues to inspect before buying a used Harley-davidson Dyna Fat Bob. What to check and how much repairs cost.
Primary chain tensioner wear causes clunking noise
MODERATEListen for clunking on cold start at idle
Fix cost: $150-$400
Cam chain tensioner failure on Twin Cam engines
SERIOUSTicking noise, check service history for upgrade
Fix cost: $400-$900
Rear isolator mount bushing deterioration
MODERATEExcessive vibration, inspect rubber mounts visually
Fix cost: $200-$500
Stator and regulator rectifier charging failure
SERIOUSCheck battery voltage at idle, look for burnt wiring
Fix cost: $300-$700
Pre-Purchase Checklist
☐Pull service records and cam tensioner history
☐Test ride cold to catch chain noise early
☐Check charging system voltage with multimeter
☐Inspect frame welds and isolator mounts closely
Solid bike, maintain cam system religiously