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MCB PLATINUM Series Stage-4 Complete Engine Rebuild Kit - Polaris 935 BIG BORE RZR 2013 And Up.

MCB's NEW PLATINUM Series Stage 4 Complete engine rebuild kit - Polaris 900 BIG BORE (935cc) RZR 2013 and up. This exclusive kit is proven to address the common wear items and DRAMATICALLY increase durability with MUCH Stronger, Precision components. In addition this MCB Big Bore kit includes a jump in CC's to 935! This is a quick and easy engine build upgrade to add power to your 900 RZR and maintain outstanding reliability. Our NEW PLATINUM engine kits are absolutely the finest, most comprehensive Engine build kits you can buy. EXCLUSIVE - All our RZR 900 rebuild kits use ONLY Custom FORGED pistons, 5140 forged crankshafts, H-BEAM connecting rods, OEM Main and Rod bearings, ETC!

Our PLATINUM kits now INCLUDE proper bearing matching. You MUST provide us with your crankcase codes (see pic) and we will then match the bearings to your new MCB crankshaft and supply you with you specific diagram showing your bearing codes and locations. We ALSO supply you with new Plasti-gauge for spot checking your crankcases to ensure these critical bearing clearances!

This MCB PLATINUM Stage-4 BIG BORE rebuild kit includes ALL of the following:

Genuine OEM Polaris completely re-plated cylinder block machined for 935cc BIG BORE!
MCB/HR NEW Forged heavy Duty 5140 crankshaft, balanced
MCB EXCLUSIVE Custom FORGED BIG BORE pistons with HD 9310 pins
MCB EXCLUSIVE Pro-Series Ring set this alone solves many issues with oil consumption (includes Stainless Top and XDS Second rings)
MCB EXCLUSIVE H-BEAM connecting rods with ARP rod bolts good to 600HP!
MATCHED OEM Polaris Main bearing set (MUST provide us your case codes)
MATCHED OEM Polaris Rod bearing set
Complete Counter-balancer bearing kit
New OE Head Bolt kit (correct TTY bolts)
MCB/AT Complete gasket set with correct valve seals/spring seats and Cometic BIG BORE head gasket
New OE Polaris Oil Pump complete with NEW drive gear and seals
New OE Polaris COMPLETE water pump (NOT just a rebuild kit)
New OE Polaris Oil Pump chain
New Genuine Borg Warner Timing chain (the BEST)
New OE Polaris Upgraded cam gear bridge (helps eliminate chain jumping)
New OE Polaris Crank Seal (the only version that DOESNT leak)
Full section Plasti-Gauge
Correct OE-specified crankcase sealant
3 Quarts Driven BR-Series engine oil (The absolute best break-in oil!)
1 Bottle high shear engine assembly lube
Engine Service manual with OEM specifications and guide.

NOTE: You MUST specify your exact year/machine AND note your original cylinder casting number (for instance 5632934) to ensure getting the correct parts. There is a cylinder core charge that will be refunded when sending us your re-plateable cylinder back.

( Please note: Depending on further mods to your machine you may, or may not, need additional tuning to maximize the 935 Big Bore additional Power)

Pricing: $2,599.95

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MCB 935cc RZR big bore Engine Kit.


  • 23430976
  • 23430976
  • MCB
  • New


Shipping Information

  • Item Requires Shipping
  • 35.0 lbs.
  • W20.0000” x H13.0000” x L16.0000”

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