Timbersled has raised the bar on quality and innovative design of lightweight aftermarket suspensions. In 2012 the Mtn. Tamer was re-engineered from its original design to be a higher quality top of the line mountain sled suspension with all new technology. This system will exceed your expectations in design quality, tune-ability and a smooth ride that you would expect from an aftermarket suspension.
The kit provides a substantial weight loss and gives added traction on all snow types. To achieve this, the system puts even pressure on the snow between the front and back portion of the rails no matter what position your sled is setting in. This is accomplished by the mounting method of our shocks and our adjustable coupling rear arm slide mechanism. This will make your sled trench less, giving you better stop and go traction in deep snow and give you better ski control on steep hills.
- 42 lbs complete suspension weight with EXIT IFP shocks.
- 38 lbs complete suspension weight with Fox Float Evol shocks.
- Simpler adjustments throughout the suspension.
- Infinite coupling control adjustment at your fingertips.
- Coupling adjustment ability, 0% to 80% (see more details below).
- Patent Pending on slide mechanism and coupling adjuster design.
- Eliminates the cam over center problem common to coupling suspensions.
- Totally progressive compression rate making it feel similar to the back suspension on a dirt bike.
- 4 great shock packages available.
- System will mount in all stock tunnel bolt holes with no modifications needed.
- System will mount to most stock rails or our custom Ice Age rails.
- Constructed from 4130 chrome molly steel and CNC machined billet aluminum
- Suspension arm color options and powder coating of the rails are available.
- Kit prices Starting at $1475.00usd with EXIT IFP shocks
The coupling adjustment is the most innovative feature of this suspension. We have added an infinite coupling control adjustment knob that can be adjusted anywhere from no coupling at all to a max of 80%. This means that the back arm can mechanically pull the front arm down 80% of its travel or anything in-between. This style of adjuster and range of adjustment has never been successfully engineered on a mountain sled suspension. It is so simple! To adjust, you turn the knob with your fingers and the adjuster threads in or out to add or remove coupling. With this we are able to eliminate some adjustments that were previously needed to make the suspension handle properly.
With the ability to adjust on the fly from one extreme to the other, you don’t need to settle for a single point between not enough and too much, good for hill climbing and bad for boondocking or vice versa. Now you can just back off the coupling adjuster for playing around hitting jumps, popping wheelies and general boondocking without the heavy ski pressure that a coupled skid has. Then when you get to some big hills and you want to high mark, turn the coupling adjuster knob in and climb with total control.
We have achieved a much smoother ride quality with this design through a combination of several factors. The mounting position for the back shock creates a very progressive compression rate. This means that the suspension is soft and buoyant at the top of the stroke and as the suspension travels downward, the spring rate builds at an even rate. This continues all the way to the point that the shock starts to compress the jounce bumper that is located on the shaft. At this point the suspension ramps up the spring rate which makes it extremely bottom out resistant before it hits the rubber bottom out pad on the slide rail. This making the suspension much more user friendly for all size people and rider types without the use of large over load springs or high air pressure.
The front arm has also been re-designed to have a lineal compression rate that has a high pre load pressure giving a long mountain sled light but positive ski pressure. With this lineal rate the front end will travel upward easier when the suspension couples. It also makes the front arm ride much smoother. In fact it is so smooth that you cannot feel it move up and down as it goes through the bumps. The combination of these 2 things makes the suspension feel like it has an endless amount of travel.
The Mtn. Tamer has a top quality line up of shocks to choose from. The list includes 4 exciting options. The standard and most affordable shocks are EXIT XO IFP shock by Zbroz racing. Also available as an upgrade is EXIT's adjustable X1 remote reservoir rear track shock.
Our Fox Racing Shox line up consist of a Float-2 front track shock and either a Float Evol or a Float-X Evol with adjustable dampening on the back. These Fox Shocks have a bleed shim piston technology. You can see more details about these shocks on our Shock Details Page.
One of our main focuses with this design is to reduce the amount of stiction in all the moving parts. "Stiction" is the amount of friction that is formed between 2 parts each time the parts stop and starts moving. We have achieved this with a combination of a few things. First is to hard anodize all the aluminum cross shafts, giving them a hard bearing like surface so that they turn much smoother in the arm bushings when under pressure
We have also reengineered our back arm slide mechanism. It has a top half and bottom half that are CNC machined from billet aluminum instead of a left and right side bottom and welded steel top like the previous model. With it being built this way and the fact that no welding has been done to it, the assembly is much more accurate and has no play or side-to-side movement in any of the parts. We have also made the slide unit longer and sealed it with internal O-rings. This will keep the grease inside and prevent dirt and grime from getting in.
With the combination of all of these things the suspension is much more responsive and moves more freely, making a more precision ride quality. This is just one way that we have upped the quality standard of aftermarket suspensions.
The tube sections of the arms are constructed from various diameters and thicknesses of 4130 Chrome-Moly steel. The arms have bent side tubes and use a weld-in gusset system that makes the arm much stronger and gives them a custom look. The side tubes on the back arm are farther apart than our previous model to provide more clearance for larger diameter shock springs that are lighter because they have fewer coils.
The back arm attaches to the CNC machined billet aluminum slide mechanism with a slip yoke and fastening bolts. The 2 halves of the slide mechanism can move in and out making the arm expand and contract with a smooth precision machine tolerance. This acts like your rear scissor arm on the stock suspension. But the use of a slide mechanism allows a wide range of coupling without the need of equal length arms.
The bottom half of the slide mechanism is the most unique part of the Mtn. Tamer design. It does not have a cross shaft where it bolts to the rails. It has machined ears that stick out with internal mounting collars that the arm pivots on. It was built this way so that we could mount our infinite coupling control adjuster. When the slide mechanism moves downward and hits the adjuster, it couples. At this point the entire suspension moves in one synchronized motion giving you controlled ski lift.
The Mtn. Tamer still uses high strength Delrin plastic bushings that we custom make in house on our CNC machines. What has changed is that we now hard anodize all cross shafts throughout the entire skid (hard anodizing is a coating that makes a very hard bearing type surface for the bushing to ride on). Hard anodizing will make all the moving parts move more freely and last indefinitely with zero wear forming.
Have you ever noticed the black/gray nasty grease coming out of the ends of the moving parts on your suspension? That is aluminum that wears off the cross shafts, mucks up the grease and makes a metal looking paste that gums up the suspension making it squeak. Then when you re-grease your skid it pumps in more nasty grease because the entire system is now contaminated. Over time this will wear out your suspension and your sled will start to feel like a clunker. This will not happen with the Mtn. Tamer, if you pump in purple grease at the beginning of the season you will still have clean purple grease at the end of the season.
What could we have possibly done to make the limiter strap better you ask? Well, we have made a few small changes that add up to a big improvement. The system includes a single limiter strap located off to the side of the shock similar to what a few of the OEM’s are now doing.
On the lower end of the strap where it attaches to the cross shaft we have installed a bushing that the strap snugly fits around so that the strap will freely rotate on the shaft without walking off to the side and sticking or hanging up in the wrong position. With this design the strap bends and folds the same direction every time the suspension moves. This prevents binding caused by the 2 ends of the strap hitting each other because they are unable to rotate properly.
Another thing we have done is put fewer adjustment holes in the strap. It now has only 4 coarse adjustments. We are able to do this because our adjust on the fly coupling system allows this suspension to be much more tune-able without the need for a lot of confusing limiter strap adjustments. To top it off we have use larger 3/8" bolts in the strap with CNC machined aluminum washers on each side to secure the 2 ends of the strap. With this you now only need one wrench size for all nuts and bolts on the entire suspension (9/16" wrench).
You have 2 options for mounting a Mtn. Tamer suspension; you can buy custom slide rails or use a fit kit on the stock rails. The use of a fit kit is the most affordable way to install the suspension onto your sled (fit kit price $50.00usd). The fit kit consists of a set of billet aluminum brackets that adapts the Mtn. Tamer back arm to the factory slide rails. The fit kits are designed for each make and model of sled. The fit kit brackets align into existing holes in the rails; however there will be some additional holes that will need to be drilled for added mounting strength. (Note: Custom rails are required for the Ski-Doo XP because no fit kit is available)
Fit Kits Include: 2 rail mounting brackets, Shock mounting brackets (if needed), Hardware
Timbersled offers a full line-up of custom slide rails designed and built for the Mtn. Tamer suspension. They will not fit the stock suspension parts. The rails are manufactured by Ice Age / BB Diversified, the same company that builds the OEM rails for Polaris Industries. The rails are custom made for Timbersled and are model specific for every sled make and model. We inventory these rails to fit rail lengths from 144 thru 174. If you are in need of a length that we do not carry, we can have them custom made for no additional cost. We also offer the service to have your rails powder coated most any color for an added cost of $75.00usd. We recommend powder coating the rails because it gives your suspension a more custom look, and it sheds snow much better than raw aluminum. The most common color is black.
The most frequent question we get is “what is the advantage of using the custom rails over the stock rails?”
- Custom rails do not have a kick up on the back of the rail that is commonly found on OEM rails. This is an advantage for high HP sleds to keep the skis down for added control.
- You will be able to keep your stock skid complete, this way you will be able to sell your stock skid or put it back in your sled when you sell it.
- The custom rails provide a very clean and custom look.
- They run 8" wheels and use either a stock Polaris, Ski-Doo or Arctic Cat axle assembly. If you are buying for one of these brands you can use the stock system. If you have a Yamaha, an axle and wheel kit will need to be purchased. We sell these kits starting at $150.00 USD.
Rail Kits Include: 2 slide rails, Hi-fax, Rail caps, Rubber bottom out bumpers, Track adjusters.