Yamaha Tests

We hate to say it, but the difference between a four-stroke and a two-stroke is night and day. A two-stroke wheelies, roosts and rockets around the track— A four-stroke feels more like driving a truck

This isn’t a cheap mod, but if you’re a serious racer, the GYTR preassembled unit is a no-brainer. As for the other GYTR treasures, we wouldn’t necessarily spring for the whole kit-and-kaboodle on our own bikes

If You Don't Know What Yamaha Changed For 2010, Then You Aren't Getting Very Good Internet Reception In Your Cave In Tora Bora

The Yamaha YZ250F Has A New Perimeter Frame, New Gas Tank, New Geometry, New Plastic And New Look, But It Has The Same Old Engine

The carbon fiber glide plate that James Stewart designed...Well, his team did anyway (it is also available for CRFs)

Here is the question that everyone wants to know the answer to, but certain people don't want to hear: Which 250 motocrosser is better? Smoker or thumper?

JGR has complete control over their bikes: They only use aftermarket parts that they believe work at the highest level of performance. If JGR isn’t satisfied with the choices, while innumerable, they take matters into their own hands and make the parts

From a scientific point of view, a high-performance motorcycle engine needs 14 times as much air as it does fuel;The stock YZ450F air filter design has serious limitations

We asked Yamaha to consider building a YZ150 version of the YZ125. They refused, but offered us a kit to turn our YZ125 into a YZ144; Best of all, it fits all 2005 to 2010 Yamaha YZ125 models

Although the MXA wrecking crew likes to be spoiled by racing ultra-expensive motocross bikes that should be accompanied by a security guard, we tried to use restraint on Pro Circuit’s YZ450F engine

We wanted to take our trusty, but rusty 2007 Yamaha YZ250 two-stroke motocross bike and make it competitive in the 450 class; We called L.A. Sleeve and ordered their YZ270 engine kit

Two-tone color choices, weird and wild graphics, and a complete line of two-strokes highlights Yamaha's 2011 motocross bikes

Real World Advice On How To Make The Most Of Your Yamaha YZ450F; Stuff you can do to make your bike better for racing

Real World Advice On How To Make The Most Of Your Yamaha YZ250F; Stuff you can do to make your bike better

Which 250 bike Is the best? We ride ’em, race ’em, wreck 'em, review 'em, rate 'em & read 'em in a few minutes time

Which 450 bike Is the best? We ride ’em, race ’em, wreck 'em, review 'em, rate 'em & you can read 'em in a few minutes time

Honda CRF450 vs. Yamaha YZ450F vs Kawasaki KX450F vs KTM 450SXF: If You Want The Specs, Read The Separate Tests; This Is To The Point

The Two Best Selling 250s Underwent Total Makeovers For 2010; How Do They Stack Up Against Each Other

When You Mix All The Colors Together You Get A Rainbow (And One Winner)

MXA Gives You The Four Maps That We Have Tested The Most; We Tell You What They Do; And We Suggest The One That Works Best With The Yamaha GYTR Power Tuner

The YZ450F has areas that need some help, and Ride Engineering has discovered a few good solutions to the chinks in the YZ450F’s motocross armor

We Test Six YZ250F Systems, And You Already Own One Of Them; DR.D, Pro Circuit, FMF, Yoshimura, Vance And Hines

Up Close And In Detail; YZ450F of David Philippaerts and YZ250F of Gautier Paulin; Plus Two Other Yamaha Sponsored Teams

An In-House Exhaust System That Is Part Of Yamaha's Classic GYTR Git Kit Program

The "Curly" Pipe That Already Has A Winning Record

Testing A Piece Of History, Chock Full Of Personal Preferences That Only James Stewart Would Like

GYTR WANTS TO RECAPTURE SOME OF THAT MAGIC FROM THE LATE ’60S AND EARLY ’70S WITH A COMPLETE LINE OF 2010 YZ450F ACCESSORIES

UNI Filter Announces A New Air Filter For the 2010 Yamaha YZ450F

A Project Bike Built To Prove That A 250 Four-Stroke Could Be Fast And Quiet; Can It be Done?

Choice Is The Lifeblood Of American Business; FMF Offers a Lot Of Choices