MOTOCROSS ACTION MID-WEEK REPORT

HOPE YOU HAD A HAPPY 4TH OF JULY FROM MXA

#WHIPITWEDNESDAY

Rider: Eli Tomac
Bike: 2011 Geico Honda CRF250
Lens: 200mm f/2.8
Focal length: 100mm
Exposure: 1/250sec
F-stop: f/9
ISO: 100

FANTASY MX SOUTHWICK NATIONAL // SPONSORED BY RIDE ENGINEERING 

MXA is partnering with Fantasizr to do an 11-round Pro Motocross Fantasy League where the fan with the most points at the end of the season will win a 2024 Beta 300 two-stroke with a bolt on FMF pipe and silencer! Each player will get a budget of $50,000 to pick 6 riders (three 250 and three 450) each round. To add to that, we will be giving out prizes each round to the fan who scores the most points! We have prizes from Nue Tech, O’Neal, Maxxis, Wiseco, MotoMuck, Boxo Tools, Ride Engineering, Acerbis, Viral Goggles, FMF, Guts, Blud, Phoenix Handlebars and Funnel Web Filter. As an added bonus just for creating a team, we will send you a 25% discount code to BLUD lubricants. Click HERE to sign up now.

>Sign up now for the Southwick National round for a chance to win this NEW Ride Engineering suspension link. 

Round 6 //July 8th: Southwick National // Sponsored by Ride Engineering

Prize: Ride Engineering Performance link

TWO-STROKE SPOTLIGHT: PATRICK JOHNSON’S 1978 KAWASAKI SR125 REPLICA

“Hello MXA! Forty years ago, Kawasaki Motor Corporation hired renowned Open Class specialist, Gaylon Mosier to contest the 1978 125cc Championship. KMC armed Gaylon with a “one-off” SR125, arguably a blend of the 1978 KX125 A4 and the yet to be released 1979 KX125 A5 production bikes. The SR125 used many parts off of Kawasaki’s production bikes, but also incorporated unique design features intended for the future UniTrak rear suspension. Like most works bikes of the day, at the end of the 1978 season, the bike was destroyed and put into a dumpster in the back of KMC’s race shop.

To commemorate the 40th anniversary of Gaylon’s 1978 125cc campaign (placing 2nd behind Broc Glover), I created this exact replica of the 1978 SR125. To quote Marty Tripes, it’s a “works bike made in America”. Starting with a 1979 KX125, I reverse engineered the chassis and engine into a replica works racer.” –Pj

EDITORS NOTE: Please keep those submissions coming. If you would like your bike to be featured in the “Two-Stroke Spotlight,” please email me at [email protected]. All I ask is that you give a breakdown of your bike and a detailed description of the build. Please also send a few photos of your steed. By submitting your bike for the “Two-Stroke Spotlight,” you agree to release all ownership rights to the images and copy to MXA.

WSX BRITISH RESULTS // LAST YEAR CHAMPS WIN THE FIRST ROUND THIS YEAR

450 RESULTS: WSX BRITISH GRAND PRIX
1. Ken Roczen (Suz)…1-4-1
2. Joey Savatgy (Kaw)…4-2-2
3. Vince Friese (Hon)…2-3-10
4. Dean Wilson (Hon)…6-5-3
5. Justin Hill (Kaw)…3-1-15
6. Kyle Chisholm (Suz)…10-7-4
7. Justin Brayton (Hon)…5-8-9
8. Colt Nichols (Kaw)…7-9-8
9. Gregory Aranda (Yam)…16-6-5
10. Kevin Moranz (Hon)…13-10-7
(In the second moto, Roczen and   Friese were penalized two places for jumping on the Red Cross flags).

WSX 450 POINTS STANDINGS AFTER 1 OF 6 ROUNDS
1. Ken Roczen…69
2. Joey Savatgy..62
3. Vince Friese …53
4. Justin Hill …52
5. Dean Wilson …51
6. Kyle Chisholm…43
7. Justin Brayton…41
8. Colt Nichols…39
9. Gregory Aranda…36
10. Kevin Moranz…33

250 RESULTS: WSX BRITISH GRAND PRIX
1. Shane McElrath (Yam)…1-2-1
2. Max Anstie (Hon)…2-1-2
3. Enzo Lopes (Yam)…4-3-4
4. Mitchell Oldenburg (Hon)…3-14-3
6. Kyle Peters (Hon)…6-6-6
6. Maxime Desprey (Yam)…10-7-5
7. Aaron Tanti (Yam)…7-8-10
8. Henry Miller (Yam)…9-9-9
9. Jace Owen (Yam)…11-5-15
10. Cullin Park (Yam)…8-19-7

WSX 250 POINTS STANDINGS AFTER 1 OF 6 ROUNDS
1. Shane McElrath (Yam)…72
2. Max Anstie (Hon)…69
3. Enzo Lopes (Yam)…57
4. Mitchell Oldenburg (Hon)…47
5. Kyle Peters (Hon)…45
6. Maxime Desprey (Yam)…41
7. Aaron Tanti (Yam)…38
8. Henry Miller (Yam)…36
9. Jace Owen (Yam)…32
10. Cullin Park (Yam)…29

MOTO | TRIVIA

Name the rider and year. Answer at bottom of page.

SUZUKI RMZ250 VS YAMAHA YZ125 2-STROKE

QUOTE OF THE WEEK // MIKE  HARTWIG ON BEING TOLD HE WAS “TOO HARD” ON THE BIKE

Heading into the 1974 season, Mike switched from Huskys to Yamahas as they made him a factory rider.

Yamaha Japan was not supplying us with any replacement parts. The chassis would get fatigued and break. I was leading motos only to have the motorcycle fail at the finish. In those days, the point system was that if you did not finish both motos, you got no points at all. If you won the first moto and broke in the second, you got no points whatsoever.

A bit of a conflict developed between Yamaha and me. I don’t know why, but apparently, Yamaha did not care for me and the way I rode. They talked to me about backing it off and taking it easier on the bike. They thought I was trying to break the motorcycle. They said I was too hard on the motorcycle.

JIMMY DECOTIS BACK TO RACING THIS WEEKEND AFTER A LONG BATTLE WITH LYME DISEASE

MXA TEAM TESTED: BOYESEN SUPERCOOLER WATER PUMP

WHAT IS IT? The Boyesen Supercooler is an aftermarket water pump (cover and impeller) that improves water flow, engine cooling and efficiency.

WHAT’S IT COST? $199.95.

CONTACT? (800) 441-1177 or www.boyesen.com

WHAT STANDS OUT? Here’s a list of things that stand out with the Boyesen Supercooler water pump and impeller.

(1) Hydrodynamics. Boiled down to its essence (pun intended), the Boyesen Supercooler flows more water than stock water pumps. Boyesen has been working on water pumps since 1999 (during the two-stroke era), and the switch to four-strokes has only made Boyesen’s effort more important. Four-strokes run hot—very hot. The Boyesen Supercooler can reduce engine temperatures by as much as 10 degrees, as confirmed by tests at Team Kawasaki. Internal engine temperatures often rise to levels that cause damage to the cylinder, piston and valve-train components. If these parts become heated beyond the optimal operating temperature, component damage will begin to occur. How does the Supercooler prevent this? Hydrodynamics. Boyesen’s investment-cast-aluminum water pump cover has bigger water inlets, a sculpted design, no casting seams, less restrictive bends, a more efficient impeller shape and less cavitation.

(2) Casting. By casting a totally new water pump cover, Boyesen was able to maximize the flow through the unit. Boyesen’s design takes advantage of everything from Bernoulli’s effect to biological studies.

(3) Internal shape. Stock water pumps aren’t very hydrodynamic. Their internal shape and impeller create excessive air bubbles in the water. Air bubbles lessen not only water flow but the amount of water per cubic gallon. Boyesen’s nautilus-shaped cover and impeller increase pump capacity by eliminating the cavitation that creates air bubbles.

(4) Inlet size. Unlike the stocker, Boyesen’s water inlet has an increasing diameter and artfully curved shape. This is a vast improvement over most stock inlets, which decrease in diameter as they near the impeller and have a 90-degree bend at the pump (a very serious hydrodynamic no-no).

(5) Impeller. Boyesen’s patented, hydrodynamically optimized impeller design is 25 percent more efficient at moving water than the inefficient stocker. The Supercooler impeller is aluminum, while most stock impellers are plastic.

MXA RATING: If you are a practice rider who goes out for three or four laps at a time, you don’t need a Boyesen Supercooler. In fact, if you race the typical five-lap motos at your local track, you won’t get the full benefit of what the Supercooler offers. It is designed for racers who ride hard and race long motos where heat is a factor in power output. 

WE TEST PRO CIRCUIT’S 2023 YAMAHA YZ125 TWO-STROKE

CHANCE HYMAS UNDERGOES SURGERY FOR TORN ACL: OUT OF THE 250 NATIONALS

Team HRC rider Chance Hymas underwent successful surgery on Tuesday to repair a left-knee injury that he suffered while training in Florida eight days ago. Dr. Warren Kramer in Newport Beach, California, confirmed that Hymas’s ACL had been torn, and although the Idaho native felt he was able to ride, he and his team ultimately decided that it would be more prudent for him to undergo reconstruction surgery.

Hymas said. “I feel like I had found my speed and was making good progress on improving my consistency and was really excited to head to Red Bud for the next round. This injury is unfortunate, and I actually feel like I could race if I had to, but it’s better for my health to get it taken care of now, and I’m thankful that my team supports that.”

THE GREATEST DEAL IN MOTOCROSS! SUBSCRIBE TO MXA & GET $25 ROCKY MOUNTAIN CREDIT & A YEAR OF MX FUN

This is the cover of the August 2023 issue of  MXA. On the cover are Pro Circuit’s Yamaha YZ125 project bike and the 2023-1/2 GasGas’ MC450F Factory Edition. 

Inside are full-length tests of the  2023 Honda CRF450WE Works Edition (not to mention the 2023-1/2 MC450F Factory Edition) and a retro test of the 1999 Suzuki RM250 two-stroke. We take a close-up look at the 1976 Yamaha OW25—a bike that has a unique history because before the start of the 1976 racing season, Yamaha pulled out of racing—leaving their American (and GP teams) to fire their veteran riders go and bring in three relatively unknown and lower-paid  youngsters. The three USA riders were Rick Burgett, Danny Turner and Bob Hannah. Additionally, the MXA wrecking crew headed to Japan for the Kamisu City Beach Race (with a side trip to the Honda Museum). There is so much more inside. Did we mention the in-depth interview with Brian Deegan? You’ll never know how much you have missed if you don’t subscribe? Plus, you can subscribe without it costing you a cent!

Did you know that you can subscribe to MXA at absolutely no cost to you—because when you subscribe you receive a Rocky Mountain ATV/MC credit for $25 towards anything in their massive inventory. Plus, you will get all the content in the 12 monthly issues of Motocross Action magazine delivered to you home by a uniformed U.S. government employee. Don’t miss any more four-stroke tests, two-stroke tests, retro tests, race coverage, new tech or product tests….most of which never appear on the internet. And, don’t forget, the $25 credit from Rocky Mountain ATV/MC that will more than cover the cost of your subscription. To subscribe call (800) 767-0345 or Click Here

CLASSIC PHOTO

The starting line-up of the 125 Supercross class in Vegas. Riders from right to left: Casey Lytle (30), David Pingree (35), Shae Bentley (1w) and Chris Gosselaar (55).

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Moto Trivia answer: The year was 2000 and the rider is Casey Johnson on a Yamaha of Troy YZ125. Casey finished 8th overall in the 125 Nationals that year.