The new three-cylinder RS 4-strokes from Yamaha are fitted with a comprehensive self-diagnostic system that will, upon detection of an electrical problem, display a code on the LCD gauge that indicates the potential source of the problem. If you should see the warning indicator, engine icon and a two-digit... Read more

The new type “995” engine, or more commonly known as the Rotax 1000 SDI, may use two different piston sizes. Each cylinder and pistons is identified with either an “A” or a “B” designation. This identifier is found on top of the piston crown, and off to the side... Read more

All of the Yamaha four-strokes, three and four cylinder up through 2005, have a heavy rubber flap that covers the engine. Many riders have found it is beneficial to flip the flap up away from the engine as riding temperatures increase. Why is it in there? To help retain... Read more

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