Ski-Doo E-Tec 850 ULTIMATE 911 Big Bore Kit

Ski-Doo E-Tec 850 ULTIMATE 911 Big Bore Kit


Regular price $4,189.00

Must send in cylinders, exhaust valves (blades only), and head.

    • Part Number: ADBM09-203-Ultimate


The Ski-Doo 850 with its huge 80.4mm stroke was just asking for a bigger bore and we have done our homework to bring you the big 911. The all-new piston was designed from scratch to accommodate all of the needs of the 911. The all-new 85mm piston is an ultra-high-quality dual ring forged piston. Bikeman exclusive head profile giving you the most focused energy possible to make the most efficient power and maintain knock protection. If you are a technical rider that wants no-lag power the instant you hit the throttle, this kit is for you! There is endless power on tap to get yourself into the best riding situations possible.
    • 911 big bore top end kit fits all 2017+ 850 E-TEC models
    • 200+ horsepower!
    • Huge mid-range and torque gain!
    • Complete kit with everything you need to go from 850 to 911. 
    • Kit includes fuel module, pipe, y pipe, pistons, big bore cylinders, stock head mod & a stage 2 clutch kit. 
    • 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.
    • Low Elevation requires our "BIG BORE" muffler

Cylinder Core Exchange Option 

Exchange Parts - Your order will be pulled on our shelf waiting for your exchange cylinder, head & 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.





Watch the video below for proper engine break-in protocol: