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2010

MXA TEAM TESTED: HOT CAMS STAGE 1/STAGE 2 KX450F CAMSHAFTS

WHAT IS IT? The best way to modify your four-stroke’s powerband is with different intake and exhaust camshafts. Hot Cams offers two different KX450F camshaft pairs—Stage 1 and Stage 2. They fit 2009–2014 Kawasaki KX450Fs. WHAT’S IT COST? $179.95 (Stage 1/Stage 2 intake), $199.95 (Stage 1/Stage 2 exhaust). CONTACT? www.hotcamsinc.com or (515) 402-8005. WHAT STANDS OUT? Here’s a […]

MXA TEAM TESTED: NIHILO CONCEPTS KTM FENDER ADAPTER

WHAT IS IT? There is nothing worse for the racer of an older model than to have the factory come out with a completely new look for the latest production bike. It was bad enough that you were racing an old bike, but now the new model makes it look even older. This happened to KTM owners when the 2013 models came with the all-new I-beam front fender. It was instantly recognizable, which made the lack of it even more obvious. The Nihilo Concepts fender kit allows the new fender to retrofit onto 2009??2012…

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 …

MXA WRENCH TECH: HOW TO REPROGRAM YOUR 2010 THRU 2013 YAMAHA YZ450F EFI MAPS:

MXA has provided four maps (in the tables included in this article) that we liked during our testing (and we still make changes on a daily basis for different test riders). These maps don?t come with the GYTR Power Tuner. As it comes out of the box, all the fields in the GYTR Power Tuner are set at 0, 0, 0, 0, 0; which are the stock ignition and fuel settings. When you move the cursor to a specific field within the fuel injection grid, you can change the value to whole numbers between negative seven and…

MXA’S USED MOTOCROSS BIKE GUIDE: HOW TO SETUP YOUR 2010 KAWASAKI KX450F

This is the 2010 Kawasaki KX450F 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. Plastics: 2010 Kawasaki has the weakest plastics of any manufacturer. The shrouds crack almost immediately. We replaced the stock units with stronger and thicker UFO plastic. UFO sells a kit that includes a front fender, rear fender, radiator shrouds and side panels. To …

FRIDAY’S USED MOTOCROSS BIKE GUIDE: HOW TO SETUP YOUR 2010 KTM 450SXF:

This is the 2010 KTM 450SXF 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. Tires: We don?t know where KTM found a stockpile of old-school Bridgestone M59/M70 tires, but we find them acceptable. The M59 front is much better than the Dunlop 742 that comes on many other bikes. If we were the product manager at KTM, we?d be looking at spec?ing the bike …

THE MXA WRECKING CREW BUILDS A HONDA CRF264 PROJECT MOTOCROSS BIKE

   What’s unique about this MXA project bike is that it wasn?t possible a few months ago. In the past, the MXA wrecking crew has had phenomenal success with big-bore engines?with the sole exception of the Honda CRF250. From its inception, the CRF250 has defied the hop-up mavens? attempts to make it big. It isn?t that building a big-bore CRF250 isn?t a good concept, it’s just that from 2004 to 2009, it couldn?t be executed. Honda’s cylinder liner was barely thick enough to contain the forces of…

MOTOCROSS ACTION’S BITE-SIZE 2010 450 MOTOCROSS BIKE SHOOTOUT:

NUMBER ONE: 2010 KTM 450SXF     There is only one bike in 2010 that can claim to have the most peak horsepower, most top-end rev, best handling, strongest clutch, most powerful brakes, a no-tool airbox and an electric starter?and that is the KTM 450SXF. Even with all of that, it is lighter than the YZ-F, KX-F and RM-Z. The KTM powerband has the hard-to-find combination of an easy-to-use low-end and a top-end that just keeps pulling. It’s mellow in the ruts and then turns into a monster as…

MOTOCROSS ACTION’S 2010 KAWASAKI KX450F VS. KTM 450SXF SHOOTOUT

No offense to Honda, Suzuki, Yamaha and Husqvarna, but in last year’s 2009 450 Shootout, the Kawasaki KX450F and KTM 450SXF finished one-two . And, with a full year of R&D behind them, the MXA wrecking crew wanted to take the latest 2010 versions of the KX450F and 450SXF and shoot them out again. Don?t confuse MXA ‘s KX450F versus KTM 450SXF shootout with the full-blown, 2010 MXA 450 Shootout. This shootout only focuses on two of the highest-profile race bikes sold. We have raced these two bikes hea…

MXA’S USED MOTOCROSS BIKE GUIDE: HOW TO SETUP YOUR 2010 HONDA CRF450:

This is the 2010 Honda CRF450 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. Clutch: We don?t know what Honda was thinking with their four-spring clutch, but we do know that Team Honda’s 2010 riders have used Hinson six-spring clutches in their race bikes. Honda’s four-spring clutch doesn?t have enough clamping pressure for a 50-horsepower engine (u…

FRIDAY’S USED MOTOCROSS BIKE GUIDE: HOW TO SETUP YOUR 2010 YAMAHA YZ450F:

This is the 2010 Yamaha YZ450F 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. Front brake: The front brake is workmanlike, but the MXA test riders felt that it wasn?t as powerful as it should be. We traded the stock 240mm front rotor for a 270mm Galfer Wave brake rotor kit. The oversized rotor provided progressive stopping power. The complete kit (w…

MXA TEAM TESTED: LIGHTSPEED ONE-PIECE YZ450F GLIDE PLATE:

WHAT IS IT? A complete carbon fiber skid plate and case guard system in one piece. It is the exact same glide plate that James Stewart runs on his 2010 Yamaha YZ450F. For some reason, the stock skid plate and case guards on the 2010 Yamaha YZ450F are minimal at best. In fact, there is no case guard for the ignition side, and the water pump guard is so small that the vulnerable metal water lines are exposed to everything from roost to footpegs. LightSpeed has become the premier carbon fiber parts supplie…

MXA TEAM TESTED: TWIN AIR YAMAHA YZ450F POWERFLOW KIT

WHAT IS IT? A completely redesigned airbox and air filter for the 2010 and 2011 YZ450F. WHAT’S IT COST? $249.95. CONTACT? www.twinair.com or (800) 749-2890. WHAT STANDS OUT? Here’s a list of things that stand out with the Twin Air YZ450F airbox. (1) Concept. Twin Air has designed a totally new airbox and filter with the goal of getting more airflow into the throttle body. The Powerflow kit includes not only a green weenie-style air filter, but a completely new intake tract. (2) Installation. Compared to…

MXA TEAM TESTED: PRO CIRCUIT YAMAHA YZ450F SHOCK LINKAGE

WHAT IS IT? An aftermarket shock linkage for the 2010-2011 Yamaha YZ450F that alters the rising rate, kicks out the head angle, lowers the seat height and helps balance the chassis. WHAT’S IT COST? $224.95. CONTACT? www.procircuit.com or (951) 738-8050. WHAT STANDS OUT? Here’s a list of things that stand out with the Pro Circuit YZ450F shock linkage. (1) Link theory. In its simplest form, a shock linkage compresses the shock from the bottom while it is being compressed from the top by the energy of the …

FRIDAY’S USED MOTOCROSS BIKE GUIDE: HOW TO SETUP YOUR 2010 KTM 250SXF:

This is the 2010 KTM 250SXF 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.  Tires: The archaic Bridgestone M59/M70 tire combo on the 250SXF works well, but for intermediate-to-hardpack terrain, we swapped the old-school sneakers for Bridgestone’s M403 / M404 combination. Lifting: We thought about enlisting the services of Chris Angel to show us…

MXA TEAM TESTED: BRAKING OVERSIZED CRF REAR BRAKE CALIPER

WHAT IS IT? It’s a complete replacement rear brake caliper for the modern CRF that does away with Honda’s small caliper and brake pads. WHAT’S IT COST? $299.00. CONTACT? www.braking.com . WHAT STANDS OUT? Here’s a list of things that stand out with Braking’s Honda rear caliper. (1) History. In 2002, Honda’s engineers, in an effort to save weight, downsized the rear brake caliper and swapped to 50-percent smaller brake pads. Many Honda riders had trouble with the new rear brake. The smaller brake pads re…

FRIDAY’S USED MOTOCROSS BIKE GUIDE: HOW TO SETUP YOUR 2010 KTM 150SX TWO-STROKE:

This is the 2010 KTM 150SX 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.   Clutch. Take some time to look closely at your KTM 150SX clutch pack. There are four aluminum drive plates and two steel plates. Make sure that the two steel plates are in the center of the pack (not on the ends). As you would expect, the aluminum plates wear quicker th…

FRIDAY’S USED MOTOCROSS BIKE GUIDE: HOW TO SETUP YOUR 2010 KTM 250SX TWO-STROKE:

This is the 2010 KTM 250SX 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. Handlebars. Taller MXA test riders felt that the handlebars were too low. We opted for the economical choice and got taller bar clamps from KTM’s parts catalog. These were about $25, versus handlebars at about $90.     Forks. Unlike KTM’s SXF four-stroke models, the K…

FRIDAY’S USED MOTOCROSS BIKE GUIDE: HOW TO SETUP YOUR 2010 HUSQVARNA TC250:

This is the 2010 Husqvarna TC250 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. Steering head bearings. The bearings seized after six months. They were so galled that it was hard to turn the bars. Buy a spare set of steering head bearings. Engine. Ty Davis was our source for the majority of Husqvarna TC250 help. Ty is sponsored by Husky, and his Zip…

FRIDAY’S USED MOTOCROSS BIKE GUIDE: HOW TO SETUP YOUR 2010 KAWASAKI KX250F:

This is the 2010 Kawasaki KX250F 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. Throttle tube: Kawasaki vulcanizes the rubber grip to the throttle body, so it takes the patience of a saint to completely remove the grip. We pitched the throttle tube/grip assembly and installed an aftermarket aluminum throttle tube. The metal tube is very durable and …

WE TEST PRO CIRCUIT’S YAMAHA YZ450F MOTOCROSS BIKE:

You are forgiven if you are a Honda CRF450, Kawasaki KX450F or KTM 450SXF owner and you don?t give a twit about hopped-up Yamaha YZ450Fs. You may be thinking, ?Yamaha? I don?t own a Yamaha and don?t want to read about them.? But, you know deep down inside your insecure heart that you do want to know everything there is to know about the 2010 Yamaha YZ450F. Why? Because that is your competition. The YZ450F was all-new in 2010, and every racer, on every brand, has to wonder if the YZ450F’s backwards cylin…

WE TEST HOT CAMS’ YAMAHA YZ450F MOTOCROSS BIKE:

You are forgiven if you are a Honda CRF450, Kawasaki KX450F or KTM 450SXF owner and you don?t give a twit about hopped-up Yamaha YZ450Fs. You may be thinking, ?Yamaha? I don?t own a Yamaha and don?t want to read about them.? But, you know deep down inside your insecure heart that you do want to know everything there is to know about the 2010 Yamaha YZ450F. Why? Because that is your competition. The YZ450F was all-new in 2010, and every racer, on every brand, has to wonder if the YZ450F’s backwards cylin…