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Home Up LT80 PARTS KID KARTS

 

129 ELIZABETH LANE, UNIT 4, GENOA CITY, WI 53128

e-mail: info@midwestmini.com

 

NEW QUICK CHANGE LIGHTWEIGHT RACING SPROCKETS

                                                        

All NEW CNC machined aluminum racing sprockets from Midwest Mini. These are the lightest sprockets on the market today for the 120 snowmobiles. They are machined from 7075 Aircraft Alloy and feature a unique quick change keyhole profile in the center. Unlike the competition, this allows the sprockets to be quickly changed without having to remove the hub mounting bolt first making gear changes much easier to do in the garage or at the track. (All of our gearing kits now include these new sprockets). Sprockets must be used only with the quick change hubs. 43-44T in stock now.

Description SKU #

Price

 
Quick Change Sprocket, 43T 43SPROCKET $29.95

Quick Change Sprocket, 44T 44SPROCKET $29.95

120 RACING CLUTCH AND GEARING KIT

The stock 120's have a very heavy 40 size chain and sprockets which have a lot of inherent drag which hurts performance. The stock gear ratio is also designed to keep the sled down to a safe and often rather boring 7mph. This kit will cure that problem for good!

Racing Clutch-High Performance unit with 4 shoes and easy change springs for tuneablilty.It also features a higher engagement rpm for better take-offs. Includes Racing Clutch, Quick Change Sprocket Hub, Aluminum Sprocket and a #35 Racing Chain. Speed is generally in the 20+ mph range with these kits. Try one of our Intake Kits or Governor Springs for even more mph and horsepower.

Description SKU #

Price

 
Polaris XCR XC120 Clutch / Gearing Kit POLSPDKIT $199.95
Ski-Doo Mini-Z, MZ Rev Clutch / Gearing Kit SKISPDKIT $199.95

Arctic Cat Z-120 ZR120 Clutch / Gearing Kit CATSPDKIT $199.95

BE SURE TO CHECK OUT OUR NEW GOVERNOR SPRINGS ON THE ENGINE PAGE

ECONOMY SPEED GEARING KIT

Not Racing? Just want some more speed for play around the trails? Then this kit is ideal for you!

Includes a new 13T clutch drum to convert your stock 40 size chain over to the preferred 35 size. Also included are a quick change hub, Aluminum sprocket and chain. Simple bolt-on installation will get the speed up close to 20mph. For even more speed try our Intake Kits or Economy Performance kits that include a stronger governor spring.

Description SKU #

Price

 
Polaris XCR XC120 Economy Gearing Kit POLGEARKIT1 $139.95

Ski-Doo Mini-Z, MZ Rev Economy Gearing Kit SKIGEARKIT1 $139.95

Arctic Cat Z-120 ZR120 Economy Gearing Kit CATGEARKIT1 $139.95

HEAVY DUTY CHAIN TENSIONERS

HIGHLY RECOMMENDED TO KEEP CLUTCHES AND CHAINS FROM WEARING OUT!!

This manual chain tensioner is easy to install and elminates the factory spring loaded tensioners on the Arctic Cat Z 120 and the Ski Doo MiniZ 120 models which unfortunatley never works all that well. This tensioner constantly keeps proper alignment and load on the drive chain under hard braking and acceleration which is very important when trying to reduce chain wear and clutch slippage. Includes a CNC machined aluminum bracket that easily bolts to the side of the tunnel and a ball bearing type sprocket for accurate chain tracking. Tensioner kits are available for our 35 chain conversions as well as the stock 40 chains.

Polaris sleds already have a slot on the tunnel, so only the sprocket is needed and it's a great upgrade from the stock roller which often gets grooved causing the chain to run off the sprocket.

Description SKU #

Price

 
Arctic Cat / Ski-Doo 120 Chain Tensioner #35 Chain

HDTENSR35

$85.95

Arctic Cat / Ski-Doo 120 Chain Tensioner #40 Chain

HDTENSR40

$85.95

Polaris XCR XC120 Tensioner Sprocket #35 Chain

POLTENSR35

$24.95

Polaris XCR XC120 Tensioner Sprocket #40 Chain

POLTENSR40

$24.95

#35 CHAIN BREAKER

Our gear kits include 3ft. of #35 chain which must be cut to the correct length for your machine and sprocket combination. While there are several ways to do this including grinding off one of the pins, This #35 Chain Breaker uses a pin press to "break" chain to the desired length. Also has a flat press used to assemble chain without a master link. This way a chain can easily be made longer if desired for larger sprockets. A quality addition to any tool box!

35 CHAIN BREAKER

35CB

$21.95