4-stroke

Thumper Talk As the riding season winds down, it may be a good time to get your four-stroke ATV running up to its full po­tential. To help you out, we talked with some of the top four-stroke tun­ers in the country and asked them to lay out their best performance tips. From the Northwest, we contacted vet­eran wrench, Pete Fisher, from Pow­roll Performance up near Bend, Oregon. For the East Coast, we got shop owner Micky Dunlop from Four-Stroke Tech (https://4stroke.wixsite.com/mysite  ) to dislodge his Thumper Talk…

By Allen Knowles  and staff of Dirt Wheels FOUR-STROKE TEAR- DOWN TIPS When performance quads were two-strokes without power valves, rebuilding an engine was relatively cheap, even with labor included. Modern two-strokes with power valves are definitely more expensive to work on, but those are not available for quads unless you are willing to build your own. With modern quads, it doesn’t matter whether you are working on a sport quad or a 4x4, you will be working on a four-stroke. Costs soar with the increased…

By the staff of Dirt Wheels 2019 YAMAHA RAPTOR 700R Yamaha has so much love for sport ATVs that they keep the best-selling ATV in the category on dealer floors for you to buy today! It’s no secret, the struggle of the economic downfall in 2008 hindered the market and kick-started the decline of sport quads. Compounded with the rise in UTV technology, the sport ATV category had its heyday. Now we consider certain 4x4 machines sport models. Honestly, those 4x4s are very sporty in our opinion, and we have a blast…

Math lied to us all along, two is greater than four. Wiseco is introducing an all new conversion kit to get that sweet two stroke you've always wanted!

The Kayo 150, junior sport quad, is taking the states by storm!

1991 LT25OR VS. TODAY'S LT-R450 q At the end of 1989, Honda was assembling the last two-stroke TRX250R quad. Suzuki continued to produce their 250 QuadRacer until 1992. With Gary Denton and a few other riders at the controls, the Suzuki 250 made a presence in the GNC Motocross and in stadium racing. In 1987, Gary won his first of eight GNC MX Championships aboard a Suzuki. In 1993, Kory Ellis gave this two-stroke its final major win at the San Diego, California, round of the Micky Thompson Stadium Series. And, unless you…