Big Bore 2150cc / PROR

The Bikeman Big Bore Cylinder is a big upgrade for massive na power or building on top of the engine with a turbo. 

Big Bore 2150cc

• Bored and Sleeved Cylinders

• Custom Big Bore Pistons 93mm bore = 2.13L, 96mm = 2.26L

• Comes with Pistons, Rings, Wrist pins, circlips

BIG BORE 2300cc STROKER KIT

Kit Includes: HD exhaust springs, exhaust spring retainers, exhaust spring keepers, +1mm exhaust valves, exhaust valve seats, exhaust valve seals (+4mm exhaust for full race version, +1intake valves, intake & exhaust shim under buckets, valve shims, .430 lift high performance cams, and CNC head porting.

Please fill out this WORK ORDER FORM along with a copy of your invoice (if ordering online) and place in the box with your Cylinder Head with valves installed. Package your Cylinder Head without the valve cover and leave your intake boots attached.Bikeman Performance Plus is not responsible for damages during shipping.

**This kit requires your head to be sent to us for core charge** You can purchase head outright for additional cost.

Click here for ProR Engine Notes (head install, torq specs, cam install)

Are you looking to get the most out of your RZR PROR? Our BMP kit has been proven to produce actual results that make big horsepower. The stock platform is okay but they left so much airflow on the table. We start off by changing out the intake and exhaust valves with larger ones then CNC porting your head to our proven specs. Next we add our BMP high performance camshafts which have higher lift and a great profile to produce more all around horsepower and torque. We then add heavy duty valve springs, valve seals, retainers, shim under buckets, and shim your valves. This means we switch you out to a regular shim under bucket style adjustment and we do the valve shimming for you so your head is ready to bolt on. Kit is meant to be ran with 91 octane. If you would like to run race fuel, please let us know and we can include a race fuel map. ECU must be sent in 

***Please fill out this WORK ORDER FORM along with a copy of your invoice (if ordering online) and place in the box with your Cylinder Head with valves installed. Package your Cylinder Head without the valve cover and leave your intake boots attached.Bikeman Performance Plus is not responsible for damages during shipping.***