MOTOCROSS ACTION’S 2023 TWO-STROKE BUYER’S GUIDE

Thinking about switching to a smoker? The market for two-strokes is flush with race bikes built for riders as young as 4 years old all the way up to senior citizens

BUDGET BIKE SHOOTOUT: 2023 SUZUKI RM-Z250 FOUR-STROKE “VERSUS” YAMAHA YZ125 TWO-STROKE

You may not think they are comparable, but the AMA rulebook says they are. Which one is better?

MXA RETRO TEST: WE RIDE DAMON HUFFMAN’S 1995 FACTORY SUZUKI RM125

Test riders often head into thinking that a “works” bike is going to be all engine—a fire-breathing, rip-snorting 125 mill that hits like a 250. It ain’t always so!

MXA RETRO TEST: WE RIDE RYAN HUFFMAN’S 1998 PRIMAL IMPULSE SUZUKI RM125

Team Primal Impulse’s RM125 runs a factory cylinder, head, pipe, 2mm-longer rod, ignition and carburetor

MXA RETRO TEST: THE 2007 SUZUKI RM125 TWO-STROKE

It is easy to look at the 2007 Suzuki RM125 and see a throwback to an ancient era with the steel frame, revvy powerband and unchanged exterior

ON THE RECORD: 2004 125 TWO-STROKE SHOOTOUT

The MXA wrecking crew rounded up the five prime contenders and put them through their paces. Here is what we learned about the 2004 tiddlers

SWORDS OF THE SENIOR CITIZENS: WEAPONS OF BRADSHAW, VILLOPOTO, TEDESCO & PASTRANA

The personal two-stroke race bikes of the stars of the past — they could race anything they wanted, but they prefer two-strokes

BEST TWO-STROKE DIRT BIKES FROM 1980-2000

Did you own any of these 125cc or 250cc winners throughout the two decades?

ON THE RECORD: COMPLETE TEST OF THE 2001 SUZUKI RM125

To make the most of the Suzuki RM125 powerband you have to be comfortable living at 12,000 rpm

WE TEST THE 2006 SUZUKI RM125 TWO-STROKE

Back in 2006, Suzuki was the only Japanese manufacture that was still making upgrades to their two-strokes

PRO CIRCUIT’S GIANT KILLER SUZUKI RM125

James Stewart made easy work of the 125 class in the 2004 Nationals on his tried-and-true KX125. If he could, why couldn’t we on a Pro Circuit RM125?

MXA’S 2006 SUZUKI RM125 TWO-STROKE PROJECT BIKE

Finding used one was easy; a good one was hard

MXA SMOKE FILES: 10 STEPS TO A RACE-READY 2007 SUZUKI RM125

Don’t try this with a ten-year-old four-stroke

2007 SUZUKIS

RM 125  2007 RM125 Get ready for a shot of mid-range designed to help you blast past the competition. The RM125 has a wider powerband and more controllable power delivery than ever. Couple that smooth, strong power and refined suspension systems front and rear, and you’ve got the hottest one-two-five on the track. So get in on Suzuki’s winning tradition, with the 2007 RM125. RM-Z 250 2007 RM-Z250 The 2007 RM-Z250 is all new from the ground up and it is 100% Suzuki. The RM-Z250 features a compact, l…

WE TEST THE 2006 SUZUKI RM125

This is everything you need to know about the 2006 Suzuki tiddler

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…

ARE YOU GETTING THE MOST OUT OF YOUR 2004 BIKE?

Get Motocross Action’s simple setup tips for your 2004 motocross bikes

THE 2005 SUZUKI RM LINEUP

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…

2003 SUZUKI RM’S

2001 SUZUKI RM125!

Want to know what next year’s RM’s will look like (about six months before they release them)? Look no further. The 2001 RM’s will feature a totally new gas tank, new radiator wings, side panels, fender and front number plate. Insiders report that Kayaba will get the suspension contract for the 2001 RM250, but MXA’s spy photos reveal Showas on the 2001 RM125. Look for an external water pump, which will require new cases on both the 125 and 250. The 2001 engine is totally redesigned. The most noticeable …

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…