Big Bore 935 Kit - '15-Up RZR 900 and '13-Up Ranger 900
96mm Big Bore Cylinder Kit (Fits Polaris 900 RZR & Ranger 900)
Unleash the full potential of your Polaris 900. This 96mm Big Bore Kit delivers massive increases in both horsepower and torque, pushing your machine to 100+ crankshaft horsepower. That is an incredible jump from the stock 74 HP RZR motor, and an even bigger leap for the 60 HP or 68 HP Ranger motor.
We take a stock 900 cylinder, precision-bore it, and Nikasil-plate it to our exact specifications to ensure maximum durability and performance.
Fitment
- Polaris RZR 900: 2015-Up
- Polaris Ranger 900: 2013-Up
Compression Configuration Options
Choose the compression ratio that best matches your setup during checkout:
- 12:1 Compression Ratio: Standard setup optimized for pump gas.
- 10:1 Compression Ratio: Specially designed for custom turbocharger setups.
What's Included in the Base Kit
- Precision-Bored & Re-Nikalised Cylinder
- Two High-Performance Forged Pistons
- Piston Rings, Circlips, and Wristpins
- Base Gasket and Head Gasket
Recommended Performance Upgrades
To maximize your power gains and ensure proper calibration, we highly recommend adding the following components:
- Tuning & Clutching: BMP Custom Tunes (via Bully Dog GT) & Stage 1 Clutch Kit
- Exhaust: BMP Performance Exhaust
- For Maximum Power: BMP High-Performance Camshafts
Note: Looking for a complete package? You can find all of these recommended upgrades bundled together in our Complete 935 Big Bore Kit (Available for RZR models only).
Core Exchange & Shipping Instructions
Cylinder exchange is required for this kit.
What to send in: Send your cylinder only. However, if you are also purchasing our high-performance camshafts or custom cylinder head porting work, you must also include your stock camshafts or cylinder head.
Shipping Address:
Bikeman Performance
920 Pine Street
Saint Croix Falls, WI 54024
Engine Break-In Protocol
Proper break-in is critical to the performance and lifespan of your new big bore kit. Please watch the video below for our recommended engine break-in protocol: