The Bearing Everyone Forgets Until It Complains
When people rebuild a primary clutch, they focus on the obvious wear parts — weights, spring, bushings, the sheave faces. But there's a small component tucked inside the primary that quietly does a hard job: the needle bearing the moveable sheave rides on. On both Polaris and Can-Am primaries, that needle bearing lets the sheave slide in and out smoothly as the clutch shifts. When it runs dry, it starts to drag, whine, or feel notchy — and a primary that doesn't move freely means inconsistent engagement, uneven shifting, and accelerated wear everywhere else in the CVT.
Why Ordinary Grease Doesn't Belong in a Clutch
A primary clutch is a brutal environment: high RPM, heat, spinning inertia, and repeated in-and-out motion. Generic wheel-bearing or chassis grease can sling out, break down under heat, or turn gummy and actually slow the sheave down. That's why the bearing wants a purpose-built lubricant. The Hunterworks Primary Bearing Needle Bearing Grease is a fully synthetic grease made specifically for primary clutch needle bearings. It carries a soap thickener that repels water and protects against corrosion, and it stays put where you place it instead of flinging away at RPM. It ships in a 1oz (30cc) syringe with a locking cap, which makes it easy to lay a precise bead right on the bearing — and honestly, one tube will probably last you a lifetime.
Know Your Bearings Before You Grease
Not every bearing in the clutch world wants the same lubricant, so a quick note on fitment. This grease is made for the needle bearings found in Can-Am and Polaris primary clutches. It can also be used in Polaris one-way bearings, since those are needle bearings too. The one place it does not belong is a Can-Am one-way bearing — those require a dedicated Kluber one-way grease instead. Matching the right grease to the right bearing is a five-second decision that saves you a headache later.
How to Apply It
Whenever you have the primary apart — during a rebuild, a weight swap, or a spring change — take the extra minute to service the needle bearing. Wipe the old, tired grease off the bearing and shaft, inspect the needles for any pitting or discoloration, and then apply a modest amount of fresh grease. The rule here is restraint: just a dab will do ya. You want the needles coated and protected, not packed full, because too much grease just makes a mess and slings out. Reassemble, and the sheave should glide with that smooth, consistent motion a healthy primary is supposed to have.
A Small Step That Protects the Whole CVT
A dry or dragging needle bearing is a small problem that creates big ones — harsh engagement, belt slip, and premature clutch wear on your Polaris or Can-Am. Keeping the right synthetic grease on that bearing at every teardown is one of the cheapest insurance policies in the whole clutch. Toss a syringe of Hunterworks Needle Bearing Grease in your clutch toolbox and make it part of every rebuild.