900 big bore complete kit for 800 HO Arctic Cat models 2012-15
Proven to be one of the most reliable big bores for the 800 HO
Our choice kit for running at lower altitudes
195-197 horsepower and huge torque
Incredible low end to peak horsepower normally leaves turbo sleds in the dust
Kit Includes: Exchange Big Bore Cylinders, Exchange Exhaust Valves, 2 Pistons with rings, circlips & wristpins, Big Bore Billet Head Kit, Exhaust Valve Spacers, Timing Key.
See below description for supporting mods necessary with this kit


    • ***Unless purchasing outright, you must send in cylinders, and exhaust valves(Blades Only)*** Package all contents VERY CAREFULLY and insure the package. BMP is not responsible for damages that occur in shipping. Core parts must be in good, usable condition. Parts not in useable condition will not be credited and the customer will be responsible for return shipping.
    • Turnaround time can vary from 1-15 business days for this kit depending on if core cylinders are in stock. Normal turnaround time is between 3-5 business days.
    • Use this Work Order Form when sending parts so shipping/receiving knows how to identify them. 
    • Part #: 09-107


    Cylinder Core Exchange Options(see drop down menu):   

    • Option 1: Purchase Outright - No core cylinder or exhaust valves are required to be sent in - Raises kit price by $2000
    • Option 2: Exchange Parts, MUST send your cylinder and exhaust valves within 14 business days. As soon as you do, the $2000 charge will be refunded. Exchange parts not received in that amount of time will have no credit applied, and the customer will have to pay for return shipping. 
    • Option 3: Exchange Parts - Your order will be pulled on our shelf waiting for your exchange cylinder & exhaust valves to arrive. Once they arrive, we will normally ship the kit within a few business days. No core charge will be applied since we will have your cylinder prior to shipping the big bore cylinder. 


    Turn your fast sled into a rocket with this BMP Big Bore Kit! Our 900 kit for the 2010-1U F/M/CFR/Procross/Proclimb 800 HO models simply rocks on the trail, and climbing up the tallest mountains! Check out the dyno sheets to see for yourself, this is big horsepower, and huge torque! Test riders actually preferred this big bore sled as opposed to a pump gas turbo M8! This kit includes all work done to your cylinders(boring, extensive porting, & fresh nikasil plating), pistons(with rings, wristpins and circlips), exhaust valve spacers, and our billet head kit. You may choose to go for our stock head mod for that stealthy look for $200 less. However the billet head is recommended as it has more cooling capacity keeping you running temperatures cooler. Gaskets not included. BMP Fatt Azz pipe, BMP y-pipe, Stage 2 Clutch Kit and Power Commander are required. Boyesen Rage Cages and larger throttle bodies are recommended for optimum horsepower gains.

    ***Exchange cylinders & exhaust valves required*** If ordering online please carefully package cylinders & exhaust valves along with a copy of your invoice to: Bikeman Performance Plus 920 Pine Street Saint Croix Falls, WI 54024

    Kit Includes: Exchange Big Bore Cylinders, Exchange Exhaust Valves, 2 Pistons with rings, circlips & wristpins, Big Bore Billet Head Kit, Exhaust Valve Spacers, Timing Key.

    Recommended Options (See our complete big bore): Performance Manifold, Big Bore Performance Single Pipe, Power Commander 5, Boyesen Rage Cages, 50mm Throttle Bodies, Stage 2 Clutch Kit.

    Standard kit comes with the billet head kit. If you would like to downgrade to the stock head mod, please give us a call. 

    We strive for quick turnaround time normally between 1-3 weeks depending on stock. For more information, please call.