Arctic Cat 900 twin engines fitted with carbs come with Mikuni rack style flatslide (TM-40mm) carburetors. These carbs have an airscrew and a fuel screw, both providing adjustability to the low speed circuits. The air screw is located to the left side of the mouth of the carb, and... Read more
For all of you former two-stroke riders who now have a four-stroke parked in the garage, ask yourself this; do you have a smart charger attached to the battery of your sled, right now at this moment? Or, do you attach a smart charger every month or so to... Read more
If you’ve got a 2004 Arctic Cat 700 EFI (Firecat or Sabercat) make sure the ECU has been reprogrammed! This enhanced software makes a big difference in terms of fuel economy and overall performance. Most noticeably is the improvement in the 30-35 mph range, where the machines were originally... Read more
If you should happen to look for a wiring diagram for a 2004 Ski-Doo Legend, it’s not in the 2004 ZX Shop Manual where it’s supposed to be! Ski-Doo service found it instead in the 2004 REV Shop Manual. Go figure! Read more
If you should decide to increase the compression ratio of your engine during the course of modifications, remember that this will also reduce the peak operating RPM of the engine package. And, the higher the compression is the higher the quality of fuel that must be used for any... Read more
If you should experience fogging on the inside of the fancy LCD gauge assembly found on recent Yamaha models, do not replace the entire gauge! This is usually caused by moisture (steam) entering the gauge and condensing on the inner lens. To remedy this, inspect the rubber sealing boot... Read more
Electronic servo-controlled power valves are great for providing a wider power output, reduced noise and emissions, along with an improvement in fuel economy. They are not, however, totally service-free. The cables used to connect the servo motor to the valve will, as will most cables, stretch over time and... Read more
Many times we’re asked about the rust-colored substance on many of our sleds exhaust springs. This is simply a hi-temp silicone that we apply a small amount of in between the coils of the stretched exhaust springs in an attempt to dampen engine vibrations and subsequent spring breakage. This... Read more
Several mountain riders have discovered, clearly not by intent, that some of the front end components on their new REV-based mountain sleds are not as stout as the previous ZX-based chassis. This is when they’re hitting things like stumps and rocks; severe impact situations that wreck things like the... Read more
A number of 2004 Arctic Cat ZR 900 owners experienced durability issues with the new ACT Diamond Drive gearbox. After a thorough investigation, Arctic Cat determined an improper heat treatment was used during the manufacturing of the ACT driveshaft, allowing the driveshaft to break. Sources indicate this affected approximately... Read more