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2010 Suzuki RM-Z250 Yoshimura Project Bike Photo Gallery

Yoshimura Research and Design went bonsai on Suzuki’s 2011 RM-Z250 netting a motocross bike that was not only faster but easier to ride.

Yoshimura transforms MotoUSA's 2010 Suzuki RM-Z250 into a full fledged motocross racing machine. Check out the full story: 2010 Suzuki RM-Z250 Yoshimura Project Bike.

A Hinson clutch internals provide consistent clutch performance whether you’re on the first lap or 30-plus minutes into a moto.

2010 Suzuki RM-Z250 Yoshimura Project Bike

Ultra-trick magnesium TCR hubs are fitted to black Excel wheels with a Renthal chain spinning the drive sprocket.

This past season saw Suzuki release its first fuel injected quarter-liter motocross bike, one which garnered substantial acclaim even though it hit the market slightly later than the competition.

The RM-Z250 engine features Yosh’s Stage 3 engine kit designed for motocross racing. Not only does the set-up crank out more power it is reliable too.

Factory Connection re-valved and re-sprung the suspension for a 145-pound tester.

Rental provides the handlebars and grips as well as the final drive sprockets.

“I’ve ridden several factory race bikes for tests and such, most of which had light-switch-like power. But the Yoshimura RM-Z could be ridden by my granny it’s so docile and behaves so well low in the revs, yet pulls hard as the speeds climb."

2010 Suzuki RM-Z250 Yoshimura Project Bike

“The motor on the bike is one of the strongest 250Fs I’ve even ridden,” adds Armstrong. “It’s unreal what Yoshimura has been able to pull from that small little engine."

2010 Suzuki RM-Z250 Yoshimura Project Bike

It may cost a pretty penny, but being competitive at the highest levels of the 250F class comes with a price. Yoshimura obviously knows how to make the most of those hard-earned dollars. There’s definitely a reason they work with top race teams to build championship-winning bikes.

2010 Suzuki RM-Z250 Yoshimura Project Bike

One of the quickest and easiest ways to gain a performance edge is with suspension. For our project bike we used Factory Connection, who factors in rider weight, ability, type of tracks, etc, to come up with a spring, valving and oil-level combination.

The RM-Z’s powerband feels smoother than stock yet revs out much more quickly.

We thought for a long time before we selected the yellow 250cc Japanese four-stroke as the basis for an on-going motocross project bike with the help of our friends at Yoshimura.

2010 Suzuki RM-Z250 Yoshimura Project Bike

Armstrong summed up our Yoshimura project bike nearly perfectly, as the truly mesmerizing feature of this motorcycle isn’t one particular thing, it’s a combination of all of them.

The Yoshimura DATA system allows the rider or tuner to adjust the engine fuel and ignition settings trackside based on rider preference or terrain conditions.

Part of the reason the bike runs so well is the Yoshimura DATA system. The box works in conjunction with the PIM-2 ignition mapping system and self-tunes the motorcycle for the conditions at hand.

Just twist the throttle in neutral and one can tell this bike is special, as the snap and speed which it builds revs is almost scary.

2010 Suzuki RM-Z250 Yoshimura Project Bike

Light and nimble handling is one our favorite traits with the RM-Z.

The range over which the power is produced is equally as astonishing. The RM-Z starts building down low and pulls through the rev range with venomous fury.

It’s so forgiving on the small chop that it feels like soaking up big jumps could easily induce bottoming.

2010 Suzuki RM-Z250 Yoshimura Project Bike

Braking wave rotors, XTRIG triple clamps and Dunlop Geomax MX51 tires bring the handling on par with the monster engine.

The little RM-Z is extremely stable, yet steers with ease, while being compliant and supple over the small bumps.

2010 Suzuki RM-Z250 Yoshimura Project Bike

Some bikes have bark but don’t back it up with bite, but if anything the Yosh 250 is the other way around.

2010 Suzuki RM-Z250 Yoshimura Project Bike

Starting from the inside out, the boys stripped our RM-Z to the frame and removed the engine. From here their Stage 3 process began. The top-end came off, cylinder went one way and the cases were split and sent the other direction.

We dropped the bike of at Yoshimura's Chino, California-based shop and a month later it was the moment of truth for the RM-Z250.

While the mods aren’t if you’re looking for the ultimate RM-Z250 racebike Yoshimura can get you dialed.