Description
Upgrade the serpentine belt system on your Kawasaki Ultra 250/260/300/310 with the R&D Supercharger Belt Tensioner Wheel. This larger-diameter, precision-machined replacement offers more belt contact area, wider adjustment range, and reduced slippage – resulting in less heat, longer bearing life, and more consistent power delivery.
Major Improvements Over Stock
- Larger O.D. increases belt wrap and reduces slippage
- Wider adjustment window for precise tensioning
- Pre-installed high-quality precision bearing
- Lowers belt heat and extends supercharger bearing lifespan
Stock tensioners on Ultra models can slip under hard acceleration or high boost, causing power loss and accelerated wear. The R&D wheel fixes this with better grip and adjustability, delivering smoother operation and more reliable performance – especially on modified or high-hour skis.
Engineered for Longevity
R&D uses premium materials and tight machining tolerances so this tensioner wheel holds up to the demands of supercharged 4-stroke engines in marine conditions.
- Reduces parasitic drag for slight power gains
- Less tension needed = less strain on bearings and belts
- Direct bolt-on replacement – easy install
- Proven on race and high-performance Ultras
Enjoy more consistent boost and fewer belt-related headaches with this upgrade.
Install & Maintenance Tips
Swap directly for OEM wheel, adjust tension per R&D specs. Inspect belt condition during install. Re-check tension after first few rides. Pair with fresh belt for best results.
Enhance reliability and power on your Kawasaki Ultra with the R&D Belt Tensioner Wheel.
