2017+ GEN4 SKI-DOO 850 ZMOTION W/ RAIL BRACE

Ski Doo Gen 4 Rail Brace With Zmotion

* It appears about 10% of 2018 165" rail beams are machined differently, causing the rail brace to not fit this percentage of rails. A small amount of filing or grinding on the rail or our brace will be required for this minority of sleds*

Gen 4 ZMotion Kits:

All rail braces only available in Aluminum or Black

Offsetting the rear arm on XM & Gen 4 sleds is a popular mod that adds numerous benefits especially when hill climbing.

The ZMotion works by using the offset geometry to control transfer by making it more progressive. What this means is the rear suspension now has enough spring rate and rebound to keep you from getting stuck in that semi-wheelie position the stock rear suspension likes to get in. Keeping the skis down is usually done by tightening the springs up and tightening the limiter straps, both of which make for a harsher, unpleasant ride.

The ZMotion rear scissor is superior to just simply moving your stock scissor back because it maintains proper geometry of your suspension components relative to each other.
What that means is your sled will work and ride better in all conditions.