Big Bore

Bigger isn't always better, but when it comes to the KTM 350SXF it is!
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Was the KTM 380SX faster than the KX500 and CR500 of their times? Yes and no. Why didn't the unique KTM 380SX mid-size two-stroke catch on? It should have
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Three uniquely different two-stroke for uniquely different riders— a full-race Kawasaki KX112 for a future star, a well thought out Yamaha YZ250 & a full-on, one-off Kawasaki KX315 big bore
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This works-like BBR play bike is a perfect example of the ideas, craftsmanship and work ethic that powered the minicycle world eight years ago
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The MXA wrecking crew matches its motocross skill against the KTM X-Bow
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Did the YZ400 have anything to fear from the 2000 KTM 520SX? You bet. This bike had an incredible powerband
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No aftermarket big-bore kit is needed; however, the rest of the bike is still at price-point-level quality. It is not what we would consider to be a race-ready Supermini
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Obviously, the elephant in the room is the 366cc engine, built on stock GasGas MC 350F cases with a bolt-on, big-bore, Cylinder Works, 366cc kit on it
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MXA always asked for a large displacement 350, not a 450, but more like a 370, which is why Andy Jefferson's kitted GasGas MC366F is something we loved
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"I had a few moments of brilliance — one of them was almost passing my childhood hero, Mike Brown, and having him flip me off after I revved my engine behind him."
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This is a test of the Cylinder Works 366 engine kit. Yes, we did go all out on the rest of the bike, but the bling is just icing on the cake.
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"I got on the gas hard coming into the Talladega first corner, and I could hear Josh yelling, “Slow down!” I ignored him and kept the throttle pegged."
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Poised to be the next big thing in Supercross after an incredibly powerful performance at this year AMA National Amateur Championships, Haiden is the real deal
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2020 Suzuki trail bikes, dual sport & play bikes
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The return of the KTM 690 Enduro R in 2019 offers riders a true long-distance Enduro machine, ready to connect the tarmac with trails
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AMA Pro racing will never give the two-stroke a fair shake in the political milieu of Supercross and the AMA Nationals. And that is where the story might have ended, but this is a do-it-yourself sport
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Ben Graves' 2005 Kawasaki KX134
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The stepping stone to bigger bikes
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But not by Yamaha
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But who really needs it? We tell you, point blank
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You live and learn, one dollar at a time. By Jody Weisel The vast majority of my racing life has been spent on two-strokes, but I?m a realist. When the four-stroke revolution came along, I didn?t feel a need to fight it. I have said many…
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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…
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At first glance, this machine might make you think that Honda is bringing back two-strokes for 2014, but that isn?t the case. Just looking at this bike, you would never guess that it is a seven-year-old Honda CR85 Expert. Or, that it was…
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WHAT IS IT? Millennium Technologies is making a 270cc kit for the 2013 KTM 250SXF four-stroke. This is a straightforward bore and re-plate project that doesn?t cost an arm and a leg. WHAT'S IT COST? $246.70 (bore/re-plate cylinder), $212.93…
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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…
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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…
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