2019 Amateur Motocross Factory Racebikes—Stilez Robertson's Kawasaki KX250
Dirt Rider contributor Shan Moore attended the James Stewart Freestone Spring Championship in March and was able to take a look at some of the “factory” machinery being ridden by some of the top amateurs. Riders like Stilez Robertson are future stars of the pro ranks, and they are not by any means riding totally stock bikes. Team Green’s Ryan Holliday took the time to give us the lowdown on Robertson’s Kawasaki KX250.
Starting at the top, Robertson runs a Renthal 966 bar with the ends cut off a little bit. “He’s a little bit smaller, so we started cutting the bars for him,” Holliday said. “The bar position and everything is pretty standard. The bar mounts are standard Pro Circuit and he runs ARC levers made of Memlon composite material. [He uses] a standard ratio for the clutch lever and perch.”
Robertson’s engine is built in-house at Team Green with Pro Circuit parts. The fork and shock are Showa A-Kit components from Pro Circuit. Additional Pro Circuit components include the linkage and triple clamps, the latter of which is a different offset than stock. “All of the chassis components come from Pro Circuit as far as the modifications go,” Holliday said. “Mainly everything that’s on [the bike] is available to the public. It’s all customer-based parts and products from our sponsors. Basically, this motorcycle is available to anybody. There’s nothing on it that’s unobtainable.”
In the engine department, Holliday told us the motor package produces more everywhere. “Once [our riders are] on 250s, they’re not necessarily looking for more top or bottom. We just try to make it broad and give them more everywhere. From there, then we play with gearing as far as what their preference may be, if they want more bottom or top. Usually once they get a gearing spec, they’ll keep that for the whole season. Of course, we have a Pro Circuit exhaust system, and the silencer is a little bit different than the customer version too.”
According to Holliday, Robertson’s suspension setup is pretty standard. “I wouldn’t say he’s soft or stiff one way or the other,” Holliday offered. “It’s just a matter of keeping up with it as the [young racers] grow and get faster. We’re always having to kind of keep it updated to keep up with their weight, because they’re kids and they keep growing and getting faster. So it’s just a matter of every month or so keeping up with the setting and making sure it’s up to date for him.”
Additional aftermarket parts include a Pro Circuit water pump, which is a standard Pro Circuit part, Hinson clutch components, and a LightSpeed skid plate. The team also runs guards underneath the footpegs to prevent mud and dirt from collecting in that area.
According to Holliday, Robertson is not that picky with bike setup. “We’ve had guys that are super particular about things, but he’s pretty mellow on things,” Holliday mentioned. “He’s not too hard on the bike. Levers and all that is pretty standard, basic stuff. He just wants it to look cool.”