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SUZUKI REVEALS COMPLETE 2006 LINEUP

2006 SUZUKI RM-Z450 The RM-Z450’s entry into the world of 4-stroke motocross has met with great success. The RM-Z has established itself as the 4-stroke machine that handles like a nimble RM, but with the type of strong, tractable 4-stroke power that all riders appreciate. The RM-Z450 engine is based around an over-square bore x stroke design, with liquid-cooling, four titanium valves per cylinder and double overhead billet cams. Suzuki innovations include the Suzuki Advanced Sump System (SASS), which p…

SEE THE 2006 KAWASAKIS. GUESS WHICH ONE IS MISSING?

Today is the day to be a happy Kawasaki owner. Not only does Kawasaki release info on their complete 2006 line-up they do so in style with two almost completely brand new models. There is a bit of sad news for all you two-stroke holdouts though, Kawasaki in a move that will surely be followed […]

SEE THE 2006 HONDAS. ALTHOUGH THE TWIN-PIPER IS STILL A SECRET

CRF450R New for 2006 – Engine cases have been changed to tilt the engine forward and lower the crankshaft 5mm compared to the 2005 CRF®450R for improved turning and maneuverability. – Engine placement lowers center of gravity for improved weight feel. – Radiators are mounted 5mm lower for lower center of gravity and improved weight feel. – Newly designed water pump impeller increases water pump seal life. – New intake valve seat material improves valve durability. – New carburetor needle for better…

KXF/RMZ 250F 4-STROKE PISTONS

NOW AVAILABLE are the PRO-X 4-Stroke piston kits for both RMZ & KXF 250F models. NIKS PRO-X pistons are manufactured in Japan and are designed to be an O.E.M. replacement. The pistons are supplied in a Kit Package that includes rings, wrist pin and circlips. The KXF/RMZ250F PRO-X pistons feature the following:  The forged pistons are molded according to original specifications with performance upgrades to enhance reliability.  Aluminum Alloy maintains or exceeds factory specifications. &nb…

HONDA SPECS OF THE 2005 CR250R

A completely new engine design and a host of chassis improvements create a brand-new CR250R–a machine destined to be a winner in 2005. Features & Benefits New for 2005 – New cylinder design features RC exhaust valve housed in removable case for improved sealing and performance. – New precision-cut stainless steel cylinder base gasket and revised port timing for improved bottom-end and mid-range power. – New cylinder head combustion chamber shape for improved bottom-end and mid-range power. – New on…

2005 HONDA CRF250R

Racing improves the breed, which means this class-leading front runner enters 2005 with a host of new features plus a lighter weight. Features & Benefits New for 2005  New cylinder head porting for increased power at lower rpm.  New camshaft profile increases low-rpm torque while maintaining maximum horsepower.  New ignition map works in conjunction with new cylinder head and camshaft for improved power at virtually all engine speeds.  New spark plug with side electrode for improved spark and co…

KX250F REPORT – KAWASAKI ENTERS THE MIX

Riding the Green Machine By John Basher Everyone has been waiting with baited breath at the arrival of the new arsenal of 250 four-strokes, whether it is from Honda or Kawazuki. Wait, what’s that again? Kawazuki? Unless you’ve been living under a rock in the deepest and darkest caverns of earth (in which case you’re pretty far out of the loop), Kawasaki and Suzuki formed an alliance two years ago. By now you should be familiar with the terms of agreement between the two motorcycle manufacturers, and it …

INTRODUCING THE 2004 HONDAS

2004 CR125R Changes for 2004 ú New electronic power valve for optimum valve timing and improved power throughout the range ú TMX-x carburetor gets new throttle position sensor (TPS) for improved linear throttle response ú New quick adjust clutch perch ú New clutch lever to improve feel and action ú New aluminum Renthal Bars (971 Bend) ú New “non-slip” seat cover for increased rider control ú New footpeg hinges prevent dirt accumulation for consistent footpeg angle ú New Dunlop 742 front and 756 rear tir…

2004 YAMAHA PHOTOS AND SPECS-

2004 YAMAHA YZ125 What’s new on the 04 YZ125? 1. The shape of the scavenging port and exhaust port is changed (the timing is also revised) 2. The setting on the YPVS governor spring is changed for better acceleration in the low to mid. 3. The carb setting at the bypass port is changed. 4. The exhaust pipe is increased in overall length by 5mm, mostly at the head pipe (not on European models). 6. The diameter of the stinger is increased 1.6mm (in front of the silencer) 7. The shift pedal is downsized 9mm…

2004 KAWASAKI PHOTOS AND SPECS

2004 KAWASAKI KX125 Kawasaki engineers succeeded in boosting overall power of the 2004 KX125 and revised the chassis for even sharper handling characteristics. *The combustion chamber of the liquid-cooled, 124cc, two-stroke single-cylinder engine is reshaped and compression increased to give it more low and mid-range power and crisper throttle response. *Aiding the enhanced throttle response is a new piston and ring, which has the piston ring locating pin at the rear of the cylinder to evenly distribute…

2004 SUZUKI PHOTOS

2004 RM-Z250 The engine was designed by Suzuki, but the full package is being produced by Kawasaki. The compact 249cc, four-stroke, liquid cooled engine features a four-valve head (the valves are titanium). The cylinder is plated aluminum and houses a forged, two-ring piston. Carburetion is via a 37mm Keihin FCR (with hot start and throttle position sensor) The lubrication system is a semi-dry sump with separate oil chambers for the crank and transmission, but shared oil. Five-speed transmission. Titani…

HONDA ANNOUNCES THE CRF250R TO THE WORLD

In a startling turn of events Honda has not only revealed the existence of their highly anticipated CRF250R, they have shown photos of it to anyone with an internet connection. It was originally thought that Honda would debut the bike at the last Japanese National with Ernesto Fonseca as the pilot, but instead they decided to announce the CRF250R at their annual dealer meeting. The bike is definitely a 2004 model so don’t get to excited yet, but after a few phone calls to Honda insiders we’ve learned th…

2002 HONDA CR250

(click on photo) CR250: 1. New third generation twin spar aluminum frame and swingarm. (1.1 lb lighter than last years frame) 2. Redesigned rear brake system with integrated reservoir and master cylinder. 3. All-new case-reed engine. 4. RC-style exhaust valves (similar to the CR125) with as electronic control module that uses engine rpm to calculate exhaust position and signal a DC servo motor to adjust the RC valve. 5. Magnesium clutch cover. 6. Showa suspension front and rear. 7. Aluminum spoke nipples…

YAMAHA DEBUTS THE YZ250F

Amidst all the hype surrounding the first outing of Honda’s RC450, Yamaha also debuted a new bike at the October 22nd race in Japan. That’s right, at the same mud race where Tortelli showed the world the RC450, Ernesto Fonseca proved to the world exactly what the YZ250F was capable of after months of rumors. Ernesto holeshot both motos and after a small battle with the locals, pulled out to a ten second victory in moto one and a twenty second victory in moto two. On hand at the event was the very proud …

YAMAHA’S ALL-NEW 250 FOUR-STROKE

Believe it or not, Yamaha will race a four-stroke in the 125 class next year. No, not a 125cc four-stroke—a 250cc four-stroke. Under current AMA rules the 125 class is limited to 0-to-125cc two-strokes and 0-to-250cc four-strokes. The all-new Yamaha YZ250F (the F stands for Four-Stroke) is a down-sized version of the popular YZ426 (which is 250 class legal). But do not think that the YZ250F is a clone of the YZ426. In fact, it shares very few engine components with its big brother. Few engine parts ar…

2001 HONDA CR125 & CR250

Want to know what’s different on the 2001 CR125 compared to the CR250 other than a smaller motor? HERE’S WHAT’S NEW ON THE 2001 CR250 1. New cylinder port shapes and timing specs provide a smoother and stronger power delivery, and produce lightning-quick acceleration. 2. All-new lighter 38mm flat-slide Mikuni TMX carburetor adds both initial throttle crispness and improved throttle response to complement the new engine character. 3. New reed-petal stopper shape improves mid-range and high-rpm power deli…

FOOLPROOF STARTING TIPS FOR YZ-F OWNERS

There is no doubt that the Yamaha YZ-F will encourage lots of new riders into the four-stroke fold. The rite of passage for any neophyte four-stroke rider is starting one of the beasts. The golden rule–tattoo this on your forehead is: “Thou shall not touch the throttle at any time during the starting process.”  If you are smart, you will do exactly what we tell you. If you’re not smart…good luck.  Step one: With the transmission in neutral, turn the gas on and pull the choke out.  Step…

MXA’S SECRET JETTING SPECS, 2003 And Back

We can’t tell you how to jet your bike. It’s a big world out there (and we don’t know you all that well). However, we can tell you what jetting we run in the MXA test fleet. Take into account that we race in a Mediterranean climate, near sea level, within sight of palm trees and never far from a Double Latte. We also run fresh 92-octane gas, work on our bikes every week, clean the filters, change pistons and rings regularly, are alert to pinging and haven’t changed oil brands in over a decade. This is t…

THE 20-INCH TIRE REVOLUTION

Why are so many of the factory riders testing 20-inch front tires? Are they guinea pigs? What are the advantages and disadvantages of the new tire size? Is the 20-inch actually smaller than a 21-inch tire? Are consumers going to have to dig into their pockets to pony up for a 20-incher next year? What’s all the hype about?