Ski Doo 850cc GEN-4 ETEC MCB FORGED DUAL-RING TOP END PISTON REBUILD KIT

MCB STAGE 1 Rebuild kits include everything needed to do a full top end rebuild!

These are a direct replacement for the following three part numbers 420893791, 420893796, 420893797

NOTE : Photo is of ACTUAL 850 ETEC kit you will receive and shows all components included.

IMPORTANT! - If your running at high elevation, high loading (Turbo), or any Severe Duty application use SKU# 23431124

INCLUDED:
- Piston(s) - STD Bore, NOTE: These are an premium forged HD dual ring piston. (stock pistons are single ring)
- Ring(s) - (2) dual ring, 2 per piston for superior ring seal, improved performance by eliminating the overheating the stock single ring and causing power fade.
- Straight wall HD Wrist Pin(s) (w/ Wrist Pin Bearing if applicable)
- 2 Pin BEARINGS
- all Circlips
- & Top End OR Complete Gasket Kit with crank seals if you choose that option.
- These pistons are made of a proprietary alloy that provides superior skirt strength, ultra flat precision machined ring lands keeping the rings properly positioned and square in the bore.

Fits all 2017-2020 850 E-TEC etec MXZ, Renegade, Summit regardless of options