About MonsterCraftsman
MonsterCraftsman builds handcrafted motorcycle fabrication parts for garage builders, custom motorcycle builders, chopper builders, bobber builders, cafe racers, drag bikes, minibikes, and anyone building machines in real garages — not assembly lines.
MonsterCraftsman started with a single product: our handcrafted motorcycle chain tensioners. Built from real-world riding and fabrication experience, our tensioners were designed to solve one of the most common problems on custom motorcycles — chain slap, chain whip, vibration, drivetrain noise, and premature sprocket wear.
Our spring-loaded chain tensioners automatically maintain proper chain tension during acceleration and deceleration, helping reduce chain movement while improving drivetrain stability and component life. They are especially effective on hardtail choppers, long-wheelbase custom motorcycles, drag bikes, minibikes, and custom fabricated builds where longer chain runs can create excessive chain movement.
Every MonsterCraftsman tensioner is built with durability and craftsmanship in mind using:
- Heavy-duty fabricated steel construction
- TIG welded components
- Powder coated finishes
- Stainless steel hardware
- Hand-wrapped stainless steel torsion springs
- Sealed bearings for smooth operation
Depending on the model, tensioners feature either:
- Heavy-duty steel idler sprockets
- Powell Peralta re-issue skateboard wheels
- Custom polyurethane wheels
MonsterCraftsman chain tensioners are designed for versatility and universal fitment. Builders can permanently weld the assembly directly to the frame or weld the included stainless steel mounting studs and bolt the tensioner on for easier installation and removal.
Our parts are built for:
- Choppers
- Bobbers
- Cafe racers
- Drag bikes
- Minibikes
- Garage-built motorcycles
- One-off custom fabricated motorcycles
Every part is built with the same mindset that drives garage builders everywhere: build it stronger, cleaner, simpler, and built to last.
And yes… they can probably still double as a toilet paper holder.
