The following is an article for the new Polaris Rush. It was written by Jerry Basset for snowmobile.com. I found it full with information and thought I would share it with you.
The key feature of the new Rush is its Pro-Ride rear end. It is instantly recognizable and instantly unique as it brings an externally structured mono-shock control arm to snowmobiling. It mimics the concept of mono-shock design commonly seen in motocross and top line off-road ‘adventure’ motorcycles. This tube-frame construction, mono-shock design replaces the standard rear arm assembly of a more traditional Polaris skid frame. The front arm remains relatively the same, but there is no coupling of the front and rear arms in the Pro-Ride. The standard front limiter straps were retained for added ski pressure tuning. The rear arm concept is totally new and exhibits some out of the suspension box thinking.
Simple To Tune
We found suspension tuning very refined, yet incredibly simple and effective. Twisting the mono-shock coil spring two turns in either direction results in an adjustment equal to either 10 or 15 pounds of rider weight. The change of 10 pounds is the number when the suspension is equipped with the standard spring. Using the heavier weight optional spring gives you the 15 pounds of change. This heavier spring is specified for riders of 225 or more pounds. Adjusting among the 16 clicker positions on the front ski shocks sets compression from soft to hard and further helps balance the sled’s handling. Making changes on the mono-shock’s 19-position clicker shock further fine-tunes the ride and complements the mono-shock setting.
On our initial Rush ride of the Daniels Summit test route, Polaris engineers overseeing our preview ride made frequent stops during which they encouraged us Rush riders to make suspensions adjustments. This allowed us to make fine-tuning adjustments to the engineer’s pre-ride base settings, while proving to us, through our own hands-on experience, just how easy tuning this suspension really is. Since the various test riders ranged from slight to heavyset, tuning adjustments paid off.
Our initial Rush ride came on cold morning trails and proved to be a throttle flipper to the handlebar affair. Our nearly 100 miles of group and solo test riding provided insight into just how the Pro-Ride handles virtually every trail condition from stutter bumps to full, suspension-sucking G-force moguls.
In the afternoon, when we were given free ride time, we made three solo circuits of the Daniels Summit loop. We deliberately ranged our ride from moderate trail speeds to full on to amped trail riding and back to trail touring. We worked a long section of suspension soaking moguls at 55-plus speeds on one tour, then 40-plus for another, and finally at 30 to 40 miles per hour to get a true appreciation for the Rush’s appeal from hardcore hot rod to suitability as touring trail sled extraordinaire.
IQ Front End
Up front the Rush features a modified Dragon SP IQ front ski suspension with a set of Walker-Evans clicker shocks replacing the Dragon SP’s air-float shocks. As a point of fact, Polaris engineering staffers say last year’s Dragon SP front end was actually designed for the Rush but brought to market a season early to fit the 2009 Dragon SP. You can say the Rush front end is a proven but more refined version.
Under the hood, sitting low and providing a nice low center of gravity for superior handling is Polaris’ 600 Cleanfire Injection 2 ‘fuelie’. It starts easily and runs very strong, punching power from a Polaris P85 drive to a P2 driven. Stopping is powerfully provided with Polaris’ high-performance, race-tested Wave hydraulic disc.
From the cockit you’ll reach for standard Polaris hand and thumb warmer switches, an electronic reverse button, and a toggle button for the all-new fully digital speedometer module. Traditionalists like this sled tester will whine abut the loss of an analog readout, but Polaris feels its high-tech module with digital speedo, odometer, tripmeter, fuel gauge and performance playback feature will satisfy more Rush buyers and give them a sense of something truly new and modern.
Although the handlebars are curved at the ends and wide enough to satisfy us, we really would prefer a newer integrated bar design without the bolt on curved ends. Can we say Arctic Cat handlebar design?
The racing-style seat is said to have upwards of five inches of foam. It is a familiar Dragon SP shape that accentuates the ride-forward styling. We have no complaints, as it proves amply comfortable for fast or moderate trail riding. It places you in a rapid response position to stand up when charging through the bumps. But with the Pro-Ride suspension, you’ll find yourself confidently seated once you gain confidence in how well the suspension’s 14-inches