MCB Stage 3 Polaris 570 Complete Engine Rebuild Kit ACE RANGER RZR SPORTSMAN 2013 - 2020

This Genuine MCB Stage-3 Kit comes with all necessary materials for a Stage-3 engine rebuild. (also see our Stage-4)

It includes the following parts:
- MCB HR Forged Crankshaft Assembly with NEW Connecting rod / HD Rod Bearing
- MCB Custom Forged Premium German Piston KIT Std Bore (99mm) 10.4:1 Compression (with rings, pin, clips)
- BRAND NEW OEM Polaris Cylinder - Standard Bore (+5mm Big bore kits available)
- 2 OEM Polaris Crank Bearings (this is very important as others use aftermarket bearings and may not be rated and properly classified for this application)
- 2 OEM Polaris Counter Balance Shaft bearings
- Full Engine Gasket Set / and all seals
- OEM Borg Warner Cam / Timing Chain
- Polaris OEM Crank seal
- When purchasing a MCB kit such as this one you are benefiting from our years of experience with our own in house engine builds.



Fits:
Ace 570 2015-2020 ***** SEE NOTE BELOW!
Ranger 570 2014-2020
RZR 570 EFI 2013-2020
Sportsman 570 2014-2020


IMPORTANT NOTE: On the MID 2017 and up 570, Polaris changed the taper on the Magneto side of the crankshaft. If you are unsure which you have simply measure the very end of that taper. If it measures 22mm choose the drop down option "Early/22MM". If it measures 25mm choose the drop down option "Late/25MM".

Also note the early style (22mm) crankshafts REQUIRE you to REUSE the oil jet screwed into the mag end from your old crankshaft. The late (25mm) will come already installed.