Let’s make it clear up front: 2012 has been a great year for 250F riders. All the bikes were amazing in some
way. The KTM 250SX-F became the first electric-start 250
motocross bike, the Yamaha got a new frame and more
horsepower, the Honda was refined, the Suzuki was still
on top of its game, and the new double-injected
Kawasaki was flat amazing. Who could ask for more?
We could. It’s our nature. We can’t look at any dirt bike
or group of dirt bikes without the wheels turning and
plans forming. In the 250F class, horsepower is still the
limiting factor. While the typical 450 has more muscle
than the average rider can handle, even the best-running
250Fs can benefit from a little more steam. That’s why
overbore kits are so popular. In fact, they’re more com-
mon than you realize. The guy next to you on the line?
Probably a big fat cheater. The guy next to him? Probably
a cheater with bad hygiene and a suspicious rash.
We decided to gather the 2012 250Fs one more time to
see how they work with oversize pistons and cylinders.
We’re not trying to make you into a cheater; we’re just
looking for performance for any class. Age classes usually don’t have displacement limits, and as we said before,
a really good 270 can be competitive with a 450. But not
all the 250s make really good 270s. Some are much better than others. Here’s how the 250s rank when they’re
no longer 250s.
BEYOND THE 250Fs OVERBOARD WITH OVER-BORES
How do the 250Fs stack up as 270s?
BEYOND THE 250Fs