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yoshimura

MOTOCROSS ACTION’S MID-WEEK REPORT BY JOHN BASHER (8/28/13)

PHOTO (SEQUENCE) OF THE WEEK     As a photographer I don’t ask much from the MXA test riders?they must only risk life and limb to sacrifice themselves for the good of the shot and, in turn, the magazine. Although we’ve just begun testing the 2014 KTM 150SX two-stroke, we had a close call in the very first turn. That’s Trent Pugmire burying ‘er deep for the sake of a cool shot. Fortunately Pug rode away unscathed, but as you’ll see from shot number three in this sequence he nearly punched …

THE FAT LADY SUNG! BUBBA GOES HOME TO FLORIDA & SUZUKI GOES HOME TO CALIFORNIA

James won one race (Atlanta), but was crash and injury prone at the rest of them. Yoshimura Suzuki Factory Racing’s James Stewart announced today that he will sit out the last three rounds of the 2013 AMA/FIM Supercross Championship season in order to fully recover from injury. At last weekend’s Minneapolis race, the Yoshimura Suzuki rider suffered a get-off and tweaked the wrist he?d initially injured at the end of the 2012 AMA Pro Motocross season. He expects to be rested, rehabbed and ready to race a…

WE RIDE YOSHIMURA’S FULL-RACE 2013 HONDA CRF450 TWIN-PIPER

Yoshimura’s 2013 Honda CRF450 bike test is significant for several reasons. Let us count the ways. (1) The 450 four-stroke with the most updates for 2013, the Honda CRF450 has received considerable attention from consumers and, in turn, aftermarket companies. A redesigned chassis, revised combustion chamber, Kayaba PSF air forks, six-spring clutch, twin mufflers and new bodywork have made ripples in the motocross industry. It’s no surprise that Yoshimura would focus on research and development for the 2…

MXA PRODUCT SPOTLIGHT: 2013 YOSHIMURA HONDA CRF PERFORMANCE CAMSHAFTS

Yoshimura R&D’s camshafts are CNC-machine ground from the absolute finest quality billet bar stock for the highest degree of strength and precision. After the blanks are machined to size, they are sent to Yoshimura Japan for special metallurgical treatments. The next steps are grinding to absolute specifications, checking meticulously for accuracy, and finally heat-treating the finished camshafts for lasting performance. While the cams are being ground in Japan, the cam sprockets are machined from h…

HAVE YOU SEEN THE NEW MXA? TWIN-PIPE CRF450 EXHAUST SHOOTOUT, WE BUILD A KTM 365SXF, EVERY 250F ON THE DYNO & MUCH MORE

The March 2013 issue of MXA is in the mail and on the shelves right now. Since you are looking at this on the MXA website, you probably understand that the internet can never go into the depth on bike tests, tech articles or interviews as the magazine can. To get the whole story, you need the paper edition. We tested the twice-pipes for the 2013 Honda CRF450 from FMF, DR.D. Pro Circuit and Yoshimura. Not only did we weigh them, sound test them, dyno them, race them and do back-to-back tests with a Novic…

INSIDE MXA’S WORKSHOP: BUILDING THE ULTIMATE 2012 KAWASAKI KX450F ? IF MONEY WAS NO PROBLEM WHAT WOULD YOU DO?

By John Basher After all of the 2012 bike test and shootouts are done, every MXA test rider is allowed to build his dream bike. There is no budget, no limit and no rules. Test riders can choose the bike they want, the parts they want, the suspension they want and go-for-broke. They have spent all year testing products, riding works bikes and working out the bugs on the stockers…and for this one brief period they are rewarded with the bike of their dreams. Then, the 2013 bikes come pouring in and they …

MXA TEAM TESTED: YOSHIMURA KX250F RS-4D EXHAUST SYSTEM

WHAT IS IT? It’s an exhaust system with two muffler cores. It was only available for Hondas and Suzukis in its 2011 debut year, so the KX250F system is brand new. WHAT’S IT COST? $1095.00 (carbon), $1045.00 (titanium). CONTACT? www.yoshimura-rd.com or (800) 634-9166. WHAT STANDS OUT? Here’s a list of things that stand out with Yoshimura’s 2012 KX250F RS-4D exhaust system. (1) Construction . Yoshimura offers two different types of mufflers, the RS-4 and RS-4D. The ?D? stands for ?dual core.? A traditiona…

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…

MXA TEAM TESTED: YOSHIMURA 2011-2012 CRF450 RS-4D EXHAUST

WHAT IS IT? The Yoshimura RS-4D uses the same basic design and dimensions as their standard RS-4 system, but with the addition of a unique dual-core muffler design. WHAT’S IT COST? $1045 (titanium with carbon end cap), $1095 (titanium with carbon canister and end cap). CONTACT? www.yoshimura-rd.com or (800) 634-9166. WHAT STANDS OUT? Here’s a list of things that stand out with the Yoshimura CRF450 RS-4D exhaust. (1) Development. Yoshimura is the official exhaust supplier to Team Suzuki and Team Honda, w…

MXA PERFORMANCE GUIDE TO THE 2011 YAMAHA YZ450F

The MXA wrecking isn?t totally bummed out when a manufacturer doesn?t make any changes to his new model release. As much as we like totally new bikes, we aren?t big fans of totally new problems.  A bike that stays the same is a known quantity. The factory may not have made any changes, but the MXA wrecking crew can easily fall back on its play book from the year before and bring the bike up to snuff. Even better, we are a year smarter. And so it is with the 2011 Yamaha YZ450F. For the uninformed, t…