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Kawasaki: 2018 KX250F

2018 models unleashed.

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The dominating Kawasaki KXTM250F motorcycle returns for 2018 with a list of enhancements to keep the KX250Fon top as the single-most dominant motocross bike of the last decade. The 2018 model offers an updated engine for an improved torque feeling throughout the rpm range, as well as improved holeshot performance. The KX250F still features a lightweight, slim and rigid chassis, but now features revised suspension to deliver improved bump absorption and suspension action. These improvements all mean one thing: faster lap times—the 2018 Kawasaki KX250F was found to have significantly faster lap times on the Kawasaki test track compared to the 2017 model.

The 2018 Kawasaki KX250F:

– Improved power and torque throughout the rev range

– Improved suspension settings for better compliance, resulting in quicker lap times

– This year’s KX250F is built with race-winning components to help Kawasaki riders get to the top step of the podium. From the showroom to the racetrack, the performance of Kawasaki’s KXTM family of motorcycles is proof of its engineering pedigree. It truly is the Bike that Builds Champions.

Engine

– New throttle body and fuel injector angle, for increased torque feeling throughout rpm range.

– New fuel pump with increased output pressure.

– New intake boot.

– New intake camshaft.

– New cylinder head with revised intake tract and compression ratio (13.4:1).

– New exhaust header with longer and larger piping.

Highly acclaimed for its high output and smooth power delivery, the KX250F motorcycle is back with new tuning and improved performance. Tuned to best suit race-experienced riders, the 249cc liquid- cooled, 4-stroke single’s wide power-band focuses on high-rpm performance that extends way into the over-rev. Riders will feel more power from low to high rpm, and experience improved over-rev characteristics.

Entering its second year after a major redesign, Kawasaki engineers concentrated on fine-tuning the 2018 KX250F’s performance in multiple ways. The intake path has been revised with a shorter intake funnel and redesigned duct. Intake valve timing has also been advanced. The KX250F features a new fuel pump with increased output as well as a new injector placement angle, bringing more precision and improved performance. The Fuel Injection system and ECU also now have revised settings, providing performance the rider can feel at the flick of the throttle. The exhaust header is now larger and longer, further increasing torque and power output, while retaining the resonator chamber.

These changes have improved the power feeling from ultra-low to high rpm—the engine feels stronger at all rpm. The 2018 KX250F motorcycle also features improved over-rev characteristics, resulting in less rpm drop when shifting, keeping the bike in the sweet spot of power while trying to cut the fastest lap possible. While power and torque have improved, the KX250F is also now easier to use in high-rpm operation.

The dual-injector fuel injection system of the KX250F is a key component to its performance; the 2012 KX250F was the world’s first production motocross bike to use such a system. Unlike a standard fuel injection system, which uses one injector downstream of the throttle valve, the system on the KX250F motorcycle uses a second, upstream injector located close to the airbox. The downstream injector is used to help ensure smooth, instant response featuring a finer atomization with more holes in the injector itself. The downstream injector creates that stronger low-to-mid range power and quick throttle response, while the upstream injector is charged with providing top-end power.

As rpm and throttle position increase, primary operation switches from the downstream injector to the upstream injector, depending on whether in a low (1st, 2nd) or high (3rd, 4th, 5th) gear, the transition is gradual and seamless. The upstream injector’s greater distance from the combustion chamber gives the fuel particles and intake air more time to mix, as well as allowing the mixture to cool before entering the combustion chamber, both of which contribute to more efficient filling, and ultimately more power.

Tuning

– Lightweight ECU, with revised settings.

– DFI® Connectors activate three separate engine tuning maps (standard, hard, soft).

– Optional KX FI Calibration Kit (Handheld) requires no tools, laptop or battery.

The lightweight ECU of the KX250F motorcycle was designed specifically to withstand the rigors of motocross racing, while still providing a wide variety of tuning options. The Kawasaki KX250F provides three engine maps that come pre-loaded into the motorcycle’s ECU that are easily accessible through the DFI® coupling plug. These three color-coded couplers are designed to tune for hard, medium or soft track surfaces, and allow riders to find the ideal power delivery for a particular terrain.

Using the optional KX FI Calibration Kit (handheld), sold separately as a Kawasaki Genuine Accessory, a rider can store and select from up to seven separate engine maps. The kit includes a portable handheld calibration tool, which enables riders to make changes to the engine maps without the need of a PC, laptop or battery, making it easy to tune at the track. The handheld calibration module plugs in thanks to an additional harness not included in the kit.

Frame and Suspension

– Lightweight, aluminum perimeter frame design.

– Showa 48mm Separate Function Front Fork (SFF Type 2).

Unchanged since the introduction of a new frame in 2017, the slim chassis design contributes to light, nimble handling. The flat seat makes it easy for riders to shift their weight, offering a high level of riding freedom. New for 2018 are fine-tuned front and rear suspension settings that deliver improved bump absorption, which result in improved handling. Kawasaki test riders found improved times in tight and open sections of the Kawasaki test track.

Up front you’ll find revised Showa 48mm Separate Function Front Forks (SFF Type 2) with works-style internal construction that locates its damping assembly in the left fork tube and a spring in the right. The Separate Function Front Fork construction contributes to a planted feel at the front, superb damping performance and ride comfort with greater bottoming resistance. It also has excellent agility when on the brakes or when landing jumps. For 2018, revised settings contribute to greater precision over braking bumps and through corners.

The Uni-Trak® rear suspension with Showa shock features revised settings, new for 2018. These changes contribute to improved ride feel, traction, and increased rear-end feedback. The rear shock linkage

mounts are below the swingarm to maximize wheel travel and cornering stability. Dual compression with high and low speed adjustability offers a wide range of tuning options. Self-lubricating Kashima coating on the inner shock body improves wear resistance and shock action.

Launch Control

The KX Launch Control system is a major advantage in getting out of the starting gate straight and fast. Launch Control Mode has the greatest effect within the first few seconds of releasing the clutch off the start.

The KX250F features a Launch Control system that, with the simple press of a button, allows riders to activate a separate engine map designed to assist starting in certain conditions. The Launch Control Mode map retards ignition timing, allowing tires to gain grip in low-traction situations, and allows riders to focus on their lines. Launch Control remains active through first and second gear, until the rider shifts into third gear, and then it returns to normal engine timing.

Even for top-level riders, controlling the hard-hitting power of a KX250F motocrosser off the start requires a high degree of throttle control and clutch finesse. By optimizing this power, Launch Control Mode helps riders maximize traction, increasing the chance of getting a good start.

Brakes

Contributing to the racing components found throughout the KX250F are the brakes. Up front is an oversized 270mm Braking® brand rotor, which delivers strong braking force and superb control. The petal style discs contribute to both sporty looks and help deflect debris. Rear caliper guard helps protect the caliper from damage.

Words: Press Release | Lead Image: Kawasaki Motors

Product News

RENEN Slope/Reset MX gear review

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RENEN was created in the early days of January 2021, not a long time ago in terms of a gear manufacturing company. But, with a guy like Pete Fox at the helm, it was always destined for big things.

The name RENEN originates from the German word “RENNEN” which means “race”. Pete liked the sound of that, decided to drop an “N” for aesthetics and there you have it. RENEN was born. Each piece of gear is carefully manufactured just outside Indianapolis, Indiana. This allows every piece of clothing to be overseen, right the way through the manufacturing process. Something they are very proud of.
All of their ranges are fully customisable with name and number on the back, as well as having the number on the shoulder too. The guys at RENEN were kind enough to put my name and number on the back as well as my number on the shoulders. For the custom name and numbers, it will cost you an additional $65 for all 3, but personally, I think it is worth every penny. This isn’t some shoddy shirt printing. They are sublimated into the material so there is no chance of it discolouring or it peeling off.
RENEN isn’t your typical gear company. They do not release a whole gear line every year, they do limited releases which are made to order. This allows them to release new colour ways whenever they see fit.

The first thing you notice when your gear is delivered is the presentation. It doesn’t turn up in a clear plastic bag, it arrives in a cardboard box with the RENEN logo printed on it. Inside the box, you have your invoice/receipt which again is in a custom RENEN envelope. Diving deeper into the box, the gloves come in a material bag, similar to that of a goggle bag. The jersey comes in a RENEN ziplock bag and pants wrapped in dark tissue paper with a RENEN sticker holding it together. It really is the little things that make the biggest difference. Just going that extra mile, makes receiving your gear a nice experience.
The gloves I received were the RENEN GC-2 strapless gloves, which I am a big fan of. The only downside I have found with strapless gloves is that the seam can tear around the strap band after a while, so it will be interesting to see what the durability is like on the gloves. So far though, they are incredibly comfortable. You can’t feel any of the seams and they sit tight to your palm, so no danger of them moving around whilst riding and causing blisters.
On to the pants. In terms of touch the material doesn’t feel overly spectacular. It feels durable but not necessarily high-performance. However, as soon as I started riding the jeans felt light and not restricting in the slightest. The full stretch rear panel takes up any slack around the back of the pants so that they have an even fit all around the waistband. They use a traditional zip and buckle system like most motocross pants and both seem very durable and strong.
On the inside of the pants, RENEN has its own sweat-wicking DRYCYLE lining, which helps keep the moisture down and doesn’t rub and irritate your skin whilst riding. Overall, the pants are very comfortable and have a good tapered fit down the leg. They seem durable and also wash very well. Another point to add is that you do have the option of adding a butt patch. Something that you are not going to get with most gear brands.

Again, using their DRYCYCLE fabrics, the jersey is well-ventilated and a comfortable fit. The jerseys are available in both standard fabric and ventilated mesh. Being from England I opted for the standard fabric which still offered plenty of ventilation. Fully sublimated graphics, names, and numbers really make you feel like a factory rider. It doesn’t get much tricker than a sublimated jersey.
During the off-season heading into 2024. RENEN signed the Triumph America team, with Jalek Swoll, Evan Ferry, and Joey Savatgy. But possibly their biggest rider to date, they signed MXGP podium regular Jeremy Seewer. With all eyes on the new manufacturer in AMA Supercross, and Seewer at the front of MXGP, I fully expect to see RENEN a lot more throughout the paddock at more local and amateur races.
Another thing worth noting is that RENEN offers odd sizes in their gear. So if you’re floating between a 32” and 34”, no need for a diet you can order your jeans in a 33” waist. They are the only gear manufacturer that offers this and is a unique selling point for the brand.


Overall, the gear ticks all the boxes that you would expect. As well as ticking a few extras such as nice packaging, sublimation, and odd sizes. RENEN is certainly raising the bar for all other gear companies to follow.

Tested and written by Brad Wheeler

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Features

Tested: 5 modifications I like to make to my YZ450F before going racing

Read now.

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MX Vice’s Tester, Brad Wheeler, Shares His Thoughts

Since picking up my YZ450F back in November I have been waiting under bated breath for the chance to race it. Practicing is all well and good, but nothing gets the blood pumping more than lining up at the start with 39 other racers.


Words: Brad Wheeler | Lead Image: Supplied


The lack of racing got me thinking, what are some of the things that I would like to do to the bike before I go to my first race on the BluCru. I have logged around 10-15 hours on the bike now and feel I have established a solid base setting and something I can build on moving forward. With that being said here are 5 modifications I will be making before my first race, which is looking like early March time.

I wasn’t going to do these in any particular order but I think it will be more beneficial for you all if I go from most important to least important, in my opinion.  

1) A genuine Yamaha holeshot device:

More often than not if you look down the starting line at any level of racing you will see bikes with a holeshot device. The point of the device is to preload the front fork. This does several things. It makes the bike lower to the ground, meaning you have a lower centre of mass and more control getting off the line. Secondly, it allows you to get more weight over the front of the bike, meaning you can hit the power harder and not have to worry as much about going into a wheelie. Finally, it also increases balance. Being lower to the ground you can touch the floor more comfortably. 

I have used several different brands in my time, from cheaper to more expensive and I have found that if the OEM makes their own, that is the way to go. In this instance, the Yamaha one is easy to install and simple to use. The clamp opens right up so no need to remove the fork leg. It also has a big button making it easy to engage if you are trying to set your own device. In my opinion, if you are serious about racing, a holeshot device is an absolute must.

TIP: The buttons can work themselves loose over time on any brand of device so be sure to check them regularly.  

2) ProGrip 799 ultra soft grips: 

It’s no secret that Japanese standard grips are not built with comfort in mind. They will most likely outlast any aftermarket grip on the market, but I’m looking for a bit more out of my grip. 

If you’re doing qualifying and 5 motos over the course of a weekend you’re looking at around 120-150 minutes of riding. That’s a lot of holding on. So I want a grip that is kind to my hands and also makes it easier to hold on.

Step forward Pro Grip 799 ultra soft. I have used this grip for as long as I can remember, all the way back to 50cc days. The grip is incredibly comfy and almost moulds to the shape of your hand. Don’t get me wrong, one little slide off and you can kiss the end of the grip goodbye, but that is the price you sometimes have to pay to have a comfier ride. Rather than spending thousands on suspension, try a softer grip first. You’d be amazed at the difference it can make.

3) GYTR factory racing seat cover: 

For me, this really only applies to 450s. My Yamaha 450 is a rocket ship and pulls like an express train. This is great when my arms are fresh and I can hold myself forward, but as fatigue sets in, the sheer torque of the motorcycle pushes me back towards the rear of the seat. 

The standard seat is relatively grippy and as stock seat covers go, is one of the better ones. However, the GYTR factor seat cover has 5 ribs up the seat which aid in keeping you up the front of the bike. The material of the cover itself is stickier than the stock seat cover.  

Other seat covers are available, GUTS does several different varieties of gripper seats but the GYTR is similar to the factory cover that Jago Geerts and Maxime Renaux use, and who doesn’t want to look factory?  

4) Raptor RME013 edge titanium footpegs: 

Footpegs can often be something that people overlook. They’re one of the points of contact between yourself and your machine yet get neglected. Standard footpegs have come a long way from the breadsticks they used to stand on back in the 80s. Even so, the increased grip and strength you get with the Raptor titanium peg is second to none.  

The peg bites into your boot making it virtually impossible to slip off of it. Titanium is not only lighter than steel but is also stronger. Over time the areas under stress on a steel peg become weak and are likely to fracture. However, with titanium, it would take a long time and an incredible amount of force to crack a titanium peg.  

I’m not sure if I am supposed to say this but Star Racing Monster Energy Yamaha actually BUY these pegs for their race bikes. That’s right, Eli Tomac, Cooper Webb, Justin Cooper and the other 36 250 riders they have all use Raptor titanium footpegs.  

Another plus is that the RME013 model doesn’t have the middle section you see on most pegs. This stops mud from getting jammed in there. Raptor also offers a variety of different offset pegs which is something we will be playing around with throughout the year.  

5) GYTR Akrapovic Full Exhaust System: 

The final modification that I will be making before I go racing is the addition of a GYTR  Akrapovic. For me, this is the lowest priority of the 5. Riding a YZ450F, I am not looking for more power, and the ability to move the power around with an exhaust system has been bypassed by the tuner apps available these days. 

That being said, it still has its perks. The GYTR Akrapovic (which I’m almost 100% the same as the Akrapovic Evolution system) weighs 0.85 kgs less than the standard system.  Titanium is also a stronger and more durable material, so will be less prone to cracks in weak spots like welded joints. 

This is Yamaha’s recommended after-market pipe of choice, so you know it is going to work well with the engine. Even if it isn’t more hit you are looking for, it is always nice to have your machine running smoother and sounding a little more factory than your buddies.  

Last but not least, and this cannot be understated, just how awesome the system looks. I truly believe there is something in the whole “look good, feel good” saying. I know if I pull up to the track and I have fresh gear and my bikes looking good, I am already in a positive mindset heading to the line. And as we know motocross is just as mental as it is physical.  

These 5 modifications are not gospel. What works for me, may not work for you. But, I have been racing for 22 years and my experience has taught me that these are the 5 things that make the biggest difference to myself. If you have any questions about the  

above products drop me an email at [email protected] and I will assist in any way I can.  

Tested and written by Brad Wheeler

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MX Vice News

Fox Racing Announces New Adventure Collection

Everything You Need in Adventure-ready Gear. Nothing You Don’t.

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Fox Racing, the global leader in motocross and mountain biking gear and apparel, announced the  expansion into the adventure market with a purpose-built ADV Collection that inspires performance on dirt. The all-new ADV Collection includes three jacket and pant offerings—Recon, Defend, and Ranger—built with a  minimalist chassis, GORE-TEX waterproofing, and CE protection across the board. The collection launches this  Spring on www.foxracing.com, and at participating Fox Racing dealers and channels globally.  


Words: Press Release | Lead Image: FOX


Expanding the brand’s commitment to Equip and Inspire riders, the ADV Collection draws from Fox Racing’s deep  racing heritage and appetite for performance innovation. “We recognize that off-road riding is no longer contained  to tracks and the trailheads of mountains and deserts. It can now be an extension to a rider’s commute or  countryside tour where every technical feature matters to maximize the experience on the bike. The ADV Collection was built with this in mind—connecting riders to dirt with highly versatile gear that has everything you  need and nothing you don’t. It’s a differentiated point of view in an evolving category that’s authentic and credible  to our brand,” said Michael Crocco, Sr. Global Marketing Manager at Fox Racing.  

Developed and tested over the course of three years, the all-new ADV Collection blends the brand’s expertise in  performance racewear with the utility adventure riders demand. Performance starts with the minimalist chassis  design approach and a closer-to-body fit to inspire movement in variable terrain. The main body is GUARANTEED  

TO KEEP YOU DRY with fully seam-sealed GORE-TEX materials, the gold standard in waterproof-breathable  technology. CE protection comes in the form of removable D30® back, shoulder, elbow, and knee protectors, and  reinforced fabrics to increase abrasion resistance and durability. Other features such as stretch fabrics, ventilation, and storage vary across the three product tiers to meet the demands of a multi-day or an out-and-back ride.  

The Recon GORE-TEX ADV Jacket and Pant are 949.95€ and 899.95€, respectively, and deliver maximum mobility and breathability with a minimalist fit for peak performance on dirt. The Defend GORE-TEX ADV Jacket and Pant  are 699.95€ and 649.95€, respectively, and offer maximum storage and ventilation for adaptability on the move. 

The Ranger GORE-TEX ADV Jacket and Pant are 549.95€ and 499.95€, respectively, and are the most accessible offering for essential performance on the bike. 

PRICING

Recon jacket 949,99£ / 949,95$
Recon pant 899,99£ / 899,95$
Defend jacket 699,99£ / 699,95$
Defend pant 649,99£ / 649,95$
Ranger jacket 549,99£ / 549,95$
Ranger pant 499,99£ / 499,95€

Follow @foxracing on Instagram for the official release date of the ADV Collection plus exclusive information  celebrating the brand’s 50th anniversary for 2024.  

About Fox Racing 

For over five decades, Fox Racing has been the global leader in motocross and mountain bike gear and apparel.  Fox outfits the world’s best competitive action sport athletes and enthusiasts with products that combine  innovation and style, rooted in the brand’s original competitive motocross spirit. The company is based in Irvine,  California, with offices, retail stores, and an international roster of sponsored athletes, located around the world.  www.foxracing.com

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