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Mountain Max

Mt. Max Performance Equipment

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700cc Mountain Max, SXR, XTC, VMAX 1997-2003

Drive Components
Long Track Kits (see the Kits Available)
Hiperfax from $210.00
Lightened Trailing  
Lightweight Simmons Skis
from $430.00
Reed Spacers Opens Rear Port $70.00
Delta V-Force Reeds $350.00
Carbon Fiber Reeds $150.00
Roller Secondary (Team Complete with setup) from $465.00
High Performance Polaris P-85 type complete clutch $435.00
We have to Large a product line to list all of IT! Call for details.
High Performance Parts
 141″ to 144″  Installation kits from $100.00
Pipes – Quiet – 25 Hp
Canister type 76.1 dB from $910.00
750cc Big Bore Kits/Piston Kits from $420.00 to$2900.00
Custom Porting & Head Work from $700.00
Polaris P-85 type Clutch  – Primary Clutch comes complete from $435.00
Computer Generated Billet Helixes from $170.00

For the 1997-2003 Mountain Max, SX, XTC, V-Max


Travel is not everything in the life of a good suspension, but the fact is you are not going to get over a bump very smoothly without a decent amount of travel. Most new suspensions have 10-13 inches of travel. The main problems with crossing rough terrain while maintaining speed is keeping the rear of the sled stable, and in contact with the snow for power transfer to the snow in a way that also allows for maximum travel.

Pre-load, and ride sag are not interchangeable terms but on most suspension systems pre-load is set to arrive at the proper ride sag. The only real reason for setting spring pre-load is to get proper ride sag.

Pre-load The difference between free length, and installed length of the spring.

Ride sag When the weight of the sled is placed on its suspension the suspension will sag down, the amount the sled moves downward from the suspension fully extended is ride sag.

Why should you care about ride sag? When you ride your sled you are going to hit as many positive bumps as negative. Too much sag leaves too little travel to deal with positive bumps. Too little sag and your track will not be able to follow down into the negative bumps, as it should. The “Golden Rule” for ride sag: Set ride sag at 1/3 total suspension travel. Never guess always measure. Never assume the sled is set up from the dealer to fit your needs.



A Polaris primary on a Yamaha? We offer the very tunable and reliable balanced 30 degree taper P-85 type primary clutch for the triple Yamaha’s at $435.00. This comes complete with adjustable weights and spring.  After years testing shows less belt wear, and improved contact from sheave to belt which means more power to the snow where you want it. A season of testing shows less belt wear, and improved contact from sheave to belt which means more power to the snow where you want it.

We also have Yamaha YVXC Primary clutch kits setup to the riding style you request for $195.00. For the Yamaha secondary we have Billet Helixes and the new for 2003 “Stealth Helix” also $165.00.


Clutch Kit




There is no replacement for displacement

750cc big bore puts you in the neighborhood of 86 ft/lb. torque and 140hp at 8600-RPM with pipes, reeds, trail porting, and boost bottle kit.

Where your see the most improvement is not at peak but in the bottom-end, increases of 30-40ft/lb. torque and 40-50hp at 6000-RPM. (Parts only$475.00

Our custom porting and head work adds 10-14hp and 6-9 ft lbs or torque to your sled with “stock” reliability. Through extensive testing on our shop sleds, we have found a balance between high horsepower and reliability. All porting is hand profiled and headwork is CNC machine cut to maintain proper squish band and volume. Beware of just flat cutting the head to increase compression. You have to re-cut the squish band also. We have recognized detonation problems through testing, caused by not enough clearance at the outer edges of the squish band if it is not re-cut. Porting starts at $650.00


Big Bore Kit

Let your triple breath like it should, add SLP “Quiet Triple Pipes” for a gain of 25HP at only 76.1dB. (stock dB 75.2) $925.00

Ceramic Coating starts at $400.00


SLP Quiet Triple Pipes

Page updated 7/25/2016