Height is critical. Dear ATVC: Just looking to see if anyone know what the float height should be on a 2006 Yamaha Wolverine 450 carb. In stock form the the float height = 12-14mm (0.47-0.55inches) though when it comes to a carburetor’s float (or fuel) height, there really isn’t a number setting system that you […] More »

Carb clarification cometh. Dear ATVC: Hello- I have a 2008 Arctic Cat Prowler 650 H1. I was wondering if someone could please tell me what the stock main jet and pilot jet are in these machines. Thanks in advance. Sure can – the stock configuration was 40 on the pilot and 132 on the main […] More »

Six of one, half-dozen of another. Dear ATVC: I recently blew the engine on my Suzuki LTZ-400. I brought a DRZ-400 engine after being told it would fit into my quad. (The seller won’t return my calls). 1) Does the DR-Z engine fit directly into the quad? 2) Does the LT-Z 400 carb mate directly […] More »

Carb control. The name Walbro may not be on the tip of your tongue when you think of the fuel system in your ATV but the company has been around since 1950 and, regardless of the name stamped on your machine’s carb, there’s a very good chance they played a roll in the technology. The […] More »

Does not need premix. Dear ATVC: I have a 2007 or 2008 Polaris Sportsman 90 that I thought was a 2-stroke. I filled a gallon gas can with fuel and mixed it with 2-stroke oil 50:1 ratio. Now it has no power once the throttle is opened too far and can’t climb any sort of […] More »

Water where water should not be. Dear ATVC: I have a 2002 Honda that ran fine in the fall when I parked it. I charged the battery and took it out for an early spring ride and it’s sputtering. Any suggestions? The most likely culprit is accumulation of water in your gasoline. You didn’t specify […] More »

The missing piece to the puzzle? Dear ATVC: I’ve got an older Foreman that I picked up for cheap that I’m in the process of modding out for mudding. A friend of mine mentioned velocity stacks. What are these and are they something I should be considering for an advantage? DarYL In the world of […] More »