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Heavy Duty Chain Roller Tensioner with Spring for 110cc-140cc Dirt Pit Bike
Heavy Duty Chain Roller Tensioner with Spring for 110cc-140cc Dirt Pit Bike
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Product Overview
This heavy duty chain roller tensioner with spring is designed as a replacement chain tensioner assembly for many 110cc, 125cc, and 140cc dirt bikes, pit bikes, Dirt Pit Pro-style bikes, 4-wheelers, and ATVs.
The chain tensioner helps maintain proper drive chain tension and alignment during riding. A worn, weak, or missing chain tensioner may cause chain slap, chain derailment, excessive chain wear, poor power transfer, or unstable drivetrain performance.
Built with a 3.1mm thick metal bracket, upgraded thicker spring wire, longer spring travel, and a seamless steel bushing, this tensioner is designed for stronger support, smoother roller movement, and longer service life compared with basic replacement tensioners.
Please compare the bracket length, installation hole size, roller size, mounting position, and product photos with your original chain tensioner before ordering.
Product Compatibility
| Compatible Vehicle / Engine Size | Application |
|---|---|
| 110cc Dirt Bike / Pit Bike | Chain roller tensioner replacement |
| 125cc Dirt Bike / Pit Bike | Drive chain tension and alignment support |
| 140cc Dirt Bike / Pit Bike | Compatible when mounting size matches |
| Dirt Pit Pro-Style Bike | Heavy duty chain tensioner replacement |
| 4-Wheeler / ATV | Compatible small off-road applications when size and bracket design match |
⚠️ This is a size-specific chain tensioner assembly. Please confirm your original mounting hole size, roller dimensions, and bracket shape before purchase.
Specifications
| Item | Details |
| Product Type | Heavy Duty Chain Roller Tensioner with Spring |
| Bracket Length | 88mm / 3.46" |
| Installation Hole Inner Diameter | 15mm / 0.59" |
| Roller Inner Diameter | 19mm / 0.74" |
| Roller Inner Width | 24mm / 0.94" |
| Bracket Thickness | 3.1mm Metal Bracket |
| Spring Type | Upgraded Thicker Wire Spring |
| Bushing Type | Seamless Steel Bushing |
| Compatible Engine Sizes | 110cc / 125cc / 140cc |
| Compatible Vehicles | Dirt Bike / Pit Bike / 4-Wheeler / ATV |
| Application | Drive chain tension and chain alignment |
| Condition | 100% Brand New |
Key Features
- Heavy duty chain roller tensioner for 110cc, 125cc, and 140cc dirt pit bikes
- Spring-loaded design helps maintain proper chain tension during riding
- Helps reduce chain derailment, chain slap, and excessive drivetrain wear
- 3.1mm thick metal bracket provides stronger structural support
- Seamless steel bushing supports smoother roller rotation and longer service life
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Fitment FAQ
Will this part fit my specific model and year?
This heavy duty chain roller tensioner may fit many 110cc, 125cc, and 140cc dirt bikes, pit bikes, Dirt Pit Pro-style bikes, 4-wheelers, and ATVs. Fitment depends on the bracket length, installation hole size, roller dimensions, mounting position, and chain path rather than model year alone.
Do I need to match the OEM part number?
Matching the OEM part number is helpful, but for this chain tensioner, the most important details are the 88mm bracket length, 15mm installation hole inner diameter, 19mm roller inner diameter, 24mm roller inner width, and overall bracket shape.
What models or situations does this part not fit?
This part may not fit bikes with a different chain tensioner bracket, different mounting hole size, different roller width, different swingarm design, or a chain path that does not align with this tensioner. It may also not fit larger displacement bikes using a heavier-duty or model-specific tensioner assembly.
What should I check before ordering?
Before ordering, check your original chain tensioner bracket length, mounting hole diameter, roller size, roller width, spring position, chain alignment, swingarm mounting point, and product photos. Make sure your original part matches the listed dimensions and spring-loaded tensioner design.