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Great question—fitment is everything when it comes to performance and safety. Every product page on our site includes a “Will this fit my machine?” section with detailed compatibility info. If you’re still unsure, give our team a call at 801-899-2520 or email support@r1industriesoffroad.com—we’ll confirm fitment before you buy, so you get exactly what you need the first time.
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Bikeman Performance
Big Bore Kit 82mm / 800 RZR/Ranger
From$1,19595
Unit price /
Unavailable
Increase your horsepower and torque with this big bore kit from BMP! We bore out your stock cylinders to 82mm, and send you on your way with a Cometic gasket kit. The extremely high-quality forged Wossner pistons are available in a 10.5:1 pump gas compression ratio. This is an exchange cylinder program, however, you may purchase the kit outright for only $600 extra!
Head porting, high-performance cam, performance exhaust, power commander, and clutching are recommended options. You can run the big bore cylinder on a 100% stock setup, but it will run a little on the lean side. Since dirt ingestion is the #1 cause of motor problems in the RZR 800, we recommend our high-flow intake kit.
Please fill out our WORK ORDER FORM and send engine work to:
Bikeman Performance 920 Pine Street Saint Croix Falls, WI 54024
Watch the video below for proper engine break-in protocol:
Select Year
2011-UP - PN: 12-302
2004-2010 - PN: 12-301
Cylinder Core Exchange Option
Opt 1: Purchase Cylinder Outright - No Exchange
Opt 2: Core Charge - Refunded when cylinder sent back in
Opt 3: No Charge - Will ship big bore kit once stock cylinder is received
TERMS OF CYLINDER EXCHANGE REFUND
You must send in undamaged parts. Engine Cylinder: Has not major damage. Please Package the parts well for shipping. Bikeman is is not responsible for shipping damage.