Old school tuners are sometimes thrown a curve ball when a sled with a newer ignition system is causing the performance to be reduced. Often it goes like this; a tuner is having difficulty reaching their desired peak operating RPM, and concentrates on the clutching and gearing variables. They... Read more
So your tail light doesn’t work and you’ve already checked the bulb; it’s O.K. Now what? Plan on removing the seat and doing some detective work. The wiring that runs under the seat to your taillight lives a tortured existence down under your butt, taking abuse from the seat... Read more
If you’re working on a carbed Ski-Doo and are experiencing fuel flow issues, do not forget about the little fuel filters right in the inlet where the fuel hose attaches to the carb! Ski-Doo removed these from the ZX models starting in 2000, so they’re in most everything pre-2000... Read more
So when old gas gums up the carbs on your sled, what jets are most often affected? Usually it is the pilot jets; the sled doesn’t want to run very well at just above idle or at idle unless the choke is applied is a typical symptom at fall... Read more
One thing we continue to experience each year with many sleds, particularly the Ski-Doo REV models, is where the machine will begin to run erratically, to the point of maybe even missing and backfiring. You clearly know there is something not quite right with the running quality. This is... Read more
Black Magic Racing did some looking into the ‘04 and ‘05 Arctic Cat 660 ST models and found that these sleds are not immune to engine movement. They put the sled up on a stand and in a word, “HOLY”! You wouldn’t think that a motor that big would... Read more
Maybe you own a 2005 Polaris 900, or maybe you’re considering buying a carryover at a great price. Either way, Polaris has made many detail upgrades that have been implemented on the 2005 build. A small number of units were affected by a drive shaft upgrade. A small number... Read more
Owners of 2003 and 2004 Yamaha RX Mountain sleds are encouraged to update their machines to the 2005 model specifications. Applying the 2005 model specs to the 2003 and 2004 models will minimize shift RPM loss at higher altitudes and provide better overall performance. Basically, the sled will run... Read more
Does your Ski-Doo 600 SDI foul spark plugs during warm-up? Or, does it surge excessively when the pipe is cold during acceleration? Ski-Doo has made available a revised ECM program for those 2004 600 SDI models and 2005 MX Z 600 SDI Renegade models that exhibit these symptoms (other... Read more
One corner that gets cut by many tuners involves the re-use of many of the hardware parts (nuts, bolts, cotter pins) when performing clutch service. Many of these smaller fasteners are specified for replacement during re-assembly. Do you know why? Just image what happens when a re-used cotter pin... Read more