Black Friday Deal! Click here to add your FREE Burandt Custom Clutch Kit for the Polaris Matryx Boost.
Note: You must have the Carl's Cycle Big Bore 900 Kit in your cart.
 
Unleash the beast within your sled with Carl's 900 Big Bore Kit!  This isn’t just any drop-on top end; it’s a powerhouse engineered from the same porting used by world champion hill climb racers. Transform your ordinary 850 boost sled into a full mod motor that roars with acceleration and power, ready to conquer any backcountry challenge.
 
Each kit is meticulously hand ported to perfection, crafted to maximize your sled's performance and give you the edge you crave. And the best part? You don’t need to worry about core parts – this complete, brand-new kit bolts right on, turning your snow machine into the ultimate backcountry weapon without hassle.
 
900 Boost ECU Tuning Options-
Send your ECU to BBA and we will reflash with your desired 900 Boost Tune (pump gas or race gas)
Upgrade to the EZLYNK Tuning Device where you will have access to both pump gas and race gas tunes, diagostic options, powervalve relearn, wastegate relearn, and all vehicle parameter information.
 
Kit contents-
Carl's Cycle hand ported 9r Cylinder (Ported for boost or n/a applications)
Slp 9r head
Oem Pistons (rings, circlips and wristpins)
9r high flow y-pipe
All required gaskets
9r complete power valve assembly
Spark Plugs