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MCB PLATINUM  Stage-4 1065 BIG BORE "LONG ROD" Polaris 1000 Engine Kit. 2014 - 2022

MCB's NEW 1065 BIG BORE PLATINUM LONG-ROD Series Stage-4 Rebuild kit - Polaris 1000 RZR/RANGER/GENERAL 2014 and up. If you are looking for the ultimate Power and Durability increase in a naturally aspirated 1000 this is your kit! Our NEW PLATINUM engine kits are absolutely the finest, most comprehensive Engine build kits you can buy. EXCLUSIVE - All our 1000 rebuild kits use ONLY Custom FORGED pistons, 5140 forged crankshafts, H-BEAM connecting rods, OEM Main and Rod bearings, ETC!

The MCB 1065 BIG BORE / LONG ROD build kit takes your stock 1000 Polaris to another level. Our exclusive Platinum Long-Rod kit is further enhanced by the use of a Forged Custom 96MM piston set and Matched large bore cylinder block that uses our proprietary hone finish for outstanding ring seal and exceptional cylinder wear! With NO mods whatsoever the MCB 1065 kit will easily net an additional 11HP and with additional head mods can produce 110 hp at the wheels! When clutched properly the MCB 1065 kits will run with a stock Turbo RZR. Torque is dramatically improved from right off Idle and Power gains are all the way through redline. Please NOTE: These Big Bore kits utilize a higher compression (12.5-1 depending on model/head) and with the increase in engine size, tuning will likely be required.

Our NEW 1000 Long-Rod kit uses our EXCLUSIVE H-Beam connecting rods that are not only rated to 600 HP!, but reduce bearing deflection, reduce side loading, reduce piston weight AND increase R/S ratio! We include a custom CNC'd spacer and Cometic gaskets in order to further raise the cylinder which aids cooling and reduces windage losses.

Our PLATINUM kits also now include proper OEM 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 are met!

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

Genuine OEM Polaris completely re-plated BIG BORE 96mm cylinder block
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 Napier Second rings)
MCB EXCLUSIVE H-BEAM connecting rods with ARP rod bolts good to 600HP!
MCB EXCLUSIVE CNC cylinder spacer and Cometic gaskets
MATCHED OEM Polaris Main bearing set (must provide 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
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.

Lastly, if you are looking to fully utilize the MCB 1065 extra cc's, we also recommend machining for larger exhaust valves as well as our Custom ground camshafts.
Not Available
Availability: Temporarily out of stock
Pricing: $2,899.95


  • 23430954
  • 23430954
  • MCB
  • Temporarily out of stock
  • New


Shipping Information

  • Item Requires Shipping
  • 35.0 lbs.

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