Rooster weights were: inner hole, 0.8g pins plus two each 0.5g washers middle hole, green 2.5g pin with no washers and outer hole, red 3.5g pin plus one each 0.5g washer and one each 1.5g washer. Configuration charts are part of the kit, which includes knowledge for a given elevation range and if the motor is stock or not.Being our RZR was in its stock factory setup, clutch spring was a gold/black driven clutch spring green/silver with a 54-degree straight angle helix. As part of the SLP kit, we used Team Industries’ 52-74 gram Adjustable Shift Weight Kit – known as Rooster Weights.The SLP clutch kit comes complete with installation instructions for springs and helix and the Team weights. The SLP clutch kit is simply known as RZR 900 SLP Clutch Kit (SLP part # 41-713). With that said, we chose SLP due to its experience in high-altitude performance for snowmobiles, ATVs and Sport UTVs. Along with Eric was his brother, Jerry Mathews, SLP’s general operations manager.This feature is about clutching efficiency, not a product review of SLP’s clutch kit. The distance from the starting electronic eye to the finish electronic eye was two-tenths of a mile (1056 feet).Our pilot was Eric Mathews, SLP ATV and Sport SxS technical consultant. Using a Brower Timing System, we sent our RZR on 24 timed runs up a hill with a 20-degree angle at the St. This two-clutch makeover included installing the correct high-altitude clutch weights, springs and helix into the RZR’s primary and secondary clutches in order better drive the RZR’s torque and horsepower to the wheels.
Anthony, Idaho, the RZR and Maverick were each down approximately 600 – 800 rpm and quickly dropped off – with great suddenness – when load was introduced.We enlisted the help of Starting Line Products to help us take our RZR out of its low-altitude drive and driven clutch configuration and makeover these two clutches for high-altitude use. We noted when hauling the sport UTVs up a lengthy 20-degree sand hill at the St. In a previous article, we grumpily spoke about the sea-level clutching in both the 2013 RZR XP 900 and our 2013 Can Am Maverick 1000R X rs. Though the RZR’s engine churns out awesome power at sea level, its clutching needs to be addressed for high-altitude riders.
While the Polaris RZR XP 900 is all kinds of fun to rip around in, its performance left something to be desired by our Rocky Mountain test riders.
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