This fully liquid cooled 84 mm cylinder is machined from billet aluminum and finished with tough nickel silicon carbide plated bores. Put it on top of a stock Polaris RZR engine and you've got 840cc of nearly unstoppable power. Machining the cylinder from billet offers increased wall thickness and improved coolant flow. An added bonus is there's no core charge. The cylinder is offered as a kit (with 84mm pistons, rings, pins, clips, head and base gaskets) or by itself. A Billet cam, lifters and valve spring kit are also available.

p/n 0007-00277 Polaris RZR/RZR-S 840cc Billet Cylinder/Piston Kit Includes Nickel silicon carbide coated billet cylinder, pistons, pins, rings, clips, head and base gaskets.

$1595.95

p/n 0007-00276 Polaris RZR/RZR-S 840cc Billet Cylinder only

$1195.95

Muzzys, Inc.
62910 Peerless Ct.
Bend, OR 97701
Muzzys Performance Motorcycle Exhaust Systems & Parts
541-385-0706

Direct link to product:
Polaris RZR 840cc Big Bore Kit

How many HP?

What are the performance charts showing?
Whould like to see
But it sure looks pretty
Should have one on the new RZR4

Nice, made it way to pretty, needs to look stock. Would wake up that RZR 4 for sure, does good stock be awesome with 840cc

i believe you have to do crank mod. You have to move rods over like 5mm. I think there is another company casting them and plating cylinders.Think about this those cylinders with a 4mm strocker crank you would be in the mid 900cc range. I think that is what mtx is trying to perfect.

The MUZZY 840 Billet Block will fit on std. cases and crankshaft. Can be used with stroker crank for 900 cc. This 840 kit was designed for increased torque and horsepower up to 7000rpm. There will be Hi Rev competition kits in the future that will require Billet cranks or at least welded stock cranks.

x2 , what is the hp incress

this is awesome!!!! Muzzys is at it again!!!

Nice product Muzzys! Will you need to re-program the computer in the car to accommodate this installation?

What type of ring package?
What is the piston weight?
How far over was the centerline of the bore moved?