Suzuki Boulevard S40 Common Problems
Known issues to inspect before buying a used Suzuki Boulevard S40. What to check and how much repairs cost.
Carburetor gumming from ethanol fuel sitting
MODERATERough idle, hard start, fuel smell, black smoke
Fix cost: $50-$150
Cam chain tensioner wear causing rattling
MODERATECold start rattle that disappears after warm-up
Fix cost: $80-$200
Fork seal leaks on higher mileage bikes
MODERATEOil streaks on fork tubes below upper seals
Fix cost: $100-$250
Pre-Purchase Checklist
☐Start cold, listen for top-end rattle
☐Check fork tubes for oil residue
☐Rev through full range, no stumbling
☐Inspect air filter and carb boot cracks
Simple reliable single, easy cheap maintenance overall