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bridgestone

WEIRD TALES OF THE FUTURE: STUFF YOU NEED TO SEE …IF JUST TO QUENCH YOUR CURIOSITY

          SUZUKI EXTRIGGER ELECTRIC PLAY BIKE The electric Extrigger. The Suzuzki Extrigger Concept bike, which isn?t scheduled for production yet, boasts fore and aft light-emitting devices that transmit information via complex blinking… for no reason that we can think of. The battery plugs into the gas tank?which doesn?t hold gas. The aluminum-framed machine comes with inverted forks, mag wheels, disc brakes and 136.7 pound dry weight. The electric motor comes from Panasonic…

MXA’S USED MOTOCROSS BIKE GUIDE: HOW TO SETUP YOUR 2010 YAMAHA YZ250F:

This is the 2010 Yamaha YZ250F the way the MXA test crew raced it. As a rule, we don?t go for exotic or expensive mods, but if push comes to shove, we will seek competent help (no matter how much it costs). Use MXA ‘s mods as a guide. Gearing: In stock trim, the 2010 YZ250F powerband is blessed with a ferocious bottom-end hit , but once the engine reaches the midrange, the power falls off harder than a sorority girl on a mechanical bull, then it tries rto go again when you can’t use it. Some test rider …

WE RIDE WISECO’S FULL-RACE KAWASAKI KX450F

What is it about a project bike that makes the MXA wrecking crew drool like kids in a candy store? Maybe it’s the endless possibilities. Perhaps it’s the list of trick components that litter the bike. Maybe it’s the allure of testing one company’s vision of the perfect motocross weapon. Regardless of the reasoning, we?re always eager to sling a leg over a purpose-built project bike. In recent years, Wiseco has provided plenty of exhilaration for the MXA gang. Not only have they crafted race steeds for o…

TWO-STROKE TEST: 2012 KTM 150SX IS ALL ABOUT HAVING FUN ON A DIRT BIKE

Q: IS THE KTM 150SX STILL THE ONLY KTM TIDDLER SOLD IN THE USA? A: No, the KTM 125SX motocross bike is back for 2012. Three years ago, KTM made the 125SX obsolete by introducing an identical motocross bike with more power?the 144SX. After a quick glance at sales figures for the 144SX versus the 125SX, KTM decided to shelve the 125SX and only import the 144SX, which would later morph into the 150SX. For 2012, KTM decided that the market for a true 125cc two-stroke was big enough to put it back into the l…

MXA’S LAST WEEK IN REVIEW: WHAT YOU MISSED LAST WEEK IF YOU WERE IN QUANTANAMO

HISTORY AS IT HAPPENS! PHOTO MOMENTOS OF KTM’s BIG NIGHT Ryan Dungey spanning the gap on his way to KTM’s first-ever Supercross victory. They said it couldn’t be done? Who said that? Well, Roger DeCoster for one (when he was at Honda and Suzuki). The slippery Phoenix dirt required maximum throttle control?that’s where Ryan is the best. “Pop, pop, fizz, fizz! Oh what a relief it is!” There were a lot of naysayers when Ryan Dungey passed up Joe Gibbs and Team Honda for KTM?but none now. The first man to m…

MXA TEAM TESTED: BRIDGESTONE M403/M404 INTERMEDIATE TERRAIN TIRES

WHAT IS IT? The best set of Bridgestone motocross tires currently available…maybe the best set of intermediate tires of any brand. WHAT’S IT COST? $124.95 (110/90-19); $106.95 (80/100-21). CONTACT? www.bridgestone.com or your local dealer. WHAT STANDS OUT? Here’s a list of things that stand out with Bridgestone’s M403 front and M404 rear tires . (1) Sizes. The M403 front comes in an 80-width and a 90-width. Take our advice: unless you race on rock-hard dirt that is never watered and never ru…

FRIDAY’S USED MOTOCROSS BIKE GUIDE: HOW TO SETUP YOUR 2009 YAMAHA YZ250F:

1. Shock spring. Yamaha reverted to a steel shock spring in order to reduce the price tag on the 2009 Yamaha YZ250F. This was a good move for the consumer’s pocketbook, but it added 1-1/2 pounds to the bike. If you have a 2006 through 2008 YZ250F lying around, you can swap out the steel 2009 shock spring for a much lighter titanium spring (make sure to move the plastic spring clip along with the Ti spring to prevent coil binding).     Spring rate: 5.3 kg/mm     Race sag: 10…

FRIDAY’S USED MOTOCROSS BIKE GUIDE: HOW TO SETUP YOUR 2009 KTM 250SXF:

1. Fork oil height. KTM did lower the oil height for 2009 over 2008, just not enough. We drained 15cc of oil to reduce the midstroke harshness. 2. Shock. For riders above 165 pounds, the stock 6.9 kg/mm spring works well. Lighter riders need a softer 6.6 kg/mm spring (found stock on the 2008 250SXF). 3. Gearing. Of all the 250 four-strokes, the KTM 250SXF is helped most by adding a tooth to the rear sprocket. We swapped the stock 48-tooth sprocket for a 49-tooth sprocket. For Supercross-style tracks we …