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cylinder works

WE RIDE CYLINDER WORKS’ KTM 365SXF BIG BORE

It’s no secret that we were disappointed with the 2011 KTM 350SXF. It wasn?t bad; it just wasn?t what we expected. We knew we could embrace the 350cc design philosophy if it were executed properly, because the Austrian company’s basic idea is sound: produce a mid-size, Open-class engine and tuck it into a lightweight 250cc chassis. The ideal 350cc motocross bike should produce around 50 horsepower and weigh 222 pounds. The resulting power-to-weight ratio would make it the ultimate motocross weapon. It s…

FOLLOW-UP HOP-UP! MXA REVISITS THE CYLINDER WORKS HONDA CRF270 TOP GET MORE OUT OF IT

Perhaps you recall our test of the Cylinder Works big-bore Honda CRF270 we tested in the May issue. To summarize, the bike was a blast. The big-bore kit catered to a wide range of riders, but we felt that it could be improved. Following the compl etion of our test cycle we discussed our thoughts of the CRF270 with Cylinder Works rep Jay Clark. Jay said, “If you liked that setup, you’ll love what I have in store for you next.” A few weeks later we met at Glen Helen to re-test the bike. Already quite sati…

WE RIDE CYLINDER WORKS’ BIG-BORE HONDA CRF501

When it comes to building or rebuilding a Honda CRF450 , the MXA wrecking crew has several options. First, we could go with OEM-spec engine parts for a freshly rebuilt 450cc engine. This is the most common rebuild, and it breathes new life into a tired warhorse. Second, we could take the opportunity during the rebuild phase to add a little extra oomph to our CRF450 by going to a fairly straight-forward big-bore 470cc kit with a new cylinder, rings and piston. We could have done either of these things, b…

WE RIDE CYLINDER WORKS’ BIG-BORE KAWASAKI KX269F

It’s easy to think that Cylinder Works is pandering to cheaters with their line of big-bore engine kits. There is no doubt that cheaters are drawn to what Cylinder Works has to offer, but, in truth, most big-bore engine kits go to riders who are not bound by displacement rules (Vets, play riders and offroad racers). However, there could be just a hint of pandering to cheaters in that you can?t tell a 269cc Cylinder Works cylinder from a stock-bore OEM cylinder. (They even put the same casting numbers on…

IN SEARCH OF MORE POWER WE BUILD A 280cc KTM 250SXF MOTOCROSS BIKE

This story is much more about an engine than about the bike itself. More specifically, it is about the trend that this engine represents. KTM’s 2012 250SXF engine is an advanced, 248.6cc, water-cooled and fuel-injected mechanical marvel. It was developed to incorporate Keihin fuel injection, digital mapping, electric starting and a hydraulic clutch. It is a trendsetter?in more ways than one. Can you tell that it is a big-bore? We can, but to the casual observer there is no clue. However, the guy in the …