Optimize me. Dear ATVC: Recently installed an HMF exhaust with their Optimizer on my 2018 Suzuki King Quad 750. I reading that you can tweak the “stock” HMF tune to get a little more out of it. Anyone have a tune or know what I should change any of the settings to? First off, congratulations […] More »

The 2025 GNCC season has begun. The Progressive Insurance Grand National Cross Country (GNCC Racing) Series presented by Specialized, an AMA National Championship, kicked off Saturday, February 15, 2025, with the VP Racing Big Buck GNCC in Union, South Carolina. Chilly and wet conditions filled the atmosphere on Saturday after a sunny, warm day greeted […] More »

When you’re sure your ATV is trying to tell you something. Dear ATVC: I just picked up a 2003 Prairie 650 from my stepdad. It has not been used very much, but has been sitting in the garage for about 20 years. My stepdad purchased a new battery for it the other day and accidentally […] More »

Process of elimination. Dear ATVC: My 2017 Arctic Cat VLX 700 is having some weird issues. It starts and idles great – I can rev it in neutral and it works as it should. I put it in gear and it will idle but when I give throttle it stalls out. I’m stumped. Help please! […] More »

Process of elimination mechanics. Dear ATVC: I just picked up a 1984 Honda ATC200s) Cleaned the carb and it runs great for a minute then the fuel line just goes empty. I cleaned out the tank when doing the carb also. I can mess with it and shake it or turn from res, off, on […] More »

A tale of many PZs. Dear ATVC: I was out riding my 1988 Honda TRX200sx and it started stalling after about 2 hours of riding and when I tried to give it more throttle it started to bog down. I had a friend help to find out the problem and we think it is the […] More »

Diagnosing a fuel issue. Dear ATVC: Hello – new to the forum. I picked up a second hand Coleman AT125UT. The 125UT has some issues that needs to be fixed. At the current moment I’m having an issue with it revving to high. First start up after cleaning fuel tank, replacing carb and spark plug […] More »