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More Information: 2019 RM-Z250

Full information on the all-new model.

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Press Release

Suzuki has released full technical details of its 2019 RM-Z250, with the MX2 machine getting a new frame, swingarm and suspension, plus a new engine that produces more power and torque than its predecessor. The new RM-Z250 also gets the latest version of Suzuki’s ‘Holeshot Assist Control’ and traction management systems, further improving its performance, while more angular new styling sharpens the look.

Engine

With a focus on improving both power and manageability, the 2019 RM-Z250’s engine has undergone significant enhancements.

– Peak power is improved thanks to a newly-designed cylinder head and new intake and exhaust ports, which increase airflow and combustion efficiency.

– A new intake cam profile and increased valve lift also increases power as well as controllability, giving an improved throttle response across the rev range.

– There’s also a change to the cam chain tensioner and adjuster tuning, and cam chain tensioner material to help reduce mechanical loss.

– A 30% larger air filter aperture and straighter outlet tube from the airbox increase power at all engine speeds, while power at high rpm is further boosted thanks to a new twin injector, which replaces the single injector of the previous model.

– With the main injector still positioned in the throttle body, a new secondary injector is positioned nearer the airbox, giving the fuel and intake air more time to mix prior to combustion, improving charging efficiency.

– Repositioning of the main injector now means fuel is injected upwards so that it hits the butterfly valve directly, improving atomisation of the fuel and, in turn, combustion efficiency and throttle response. Improved throttle response is further aided by a 17% increase in fuel pressure and an updated throttle body.

– When it comes to putting the new RM-Z250 engine’s increased power to the back wheel, a change to the gear ratio improves rider feeling and throttle connection. Second gear is changed to a higher ratio, going from 30/17 on the previous model to 29/17 on the 2019 machine. Final ratio is also changed, from 49/13 to 50/13.

– A longer exhaust – lengthened 99mm over the outgoing model – and change to the structure and internal material boosts power across the rev range, but mostly improves power at lower engine speeds.

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Suzuki Racing

Chassis
Frame

– A new frame retains fore-aft rigidity, running the length of the bike, but increases torsional rigidity by 10%. It also reduces weight by 370g.

– Weight reductions continue with the swingarm, which adopts a new manufacturing process from the previous model. While the old swingarm was producing using a swaging process, hydroforming is now used, removing the need for welding and saving 80g. It also uses a tapered cross section, making it more rigid, plus a new chain guide saves another 30g and is more durable.

– New seat rails are more rigid thanks to hexagonal shape, and serve to make service and maintenance easier, with removal of the air filter simpler than before.

– The frame is wrapped around the new engine, but the powerplant mounts 8.5mm higher for better handling, while the mounting changes too, for more rigidity. More weight is lost with the engine mounting brackets going from steel to aluminium, with 90g dropped.

Ergonomic changes help improve handling performance and the bike’s agility.

– New Renthal handlebars are straighter and enable riders to easily shift their weight to the front. They’re also 7.4mm further forward and 3.8mm lower, while the footrests are 3.3mm forward and 5.2mm higher.

– Further weight is shed with a new fuel tank, which saves 312g, while a slimmer seat loses another 274g and makes it easier for the rider to move around.

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Suzuki Racing

Suspension

Fully-adjustable suspension is again provided by KYB, with spring forks replacing the air forks on the previous generation, and a new rear shock. There are also further weight reductions, thanks to a lightweight spring with thin wire diameter, derived from MotoGP knowhow. This reduces weight by 370g, while the rear suspension linkage is reduced in weight by 15g.

Brakes

Fully-adjustable suspension is again provided by KYB, with spring forks replacing the air forks on the previous generation, and a new rear shock. There are also further weight reductions, thanks to a lightweight spring with thin wire diameter, derived from MotoGP knowhow. This reduces weight by 370g, while the rear suspension linkage is reduced in weight by 15g.

Wheels

Turning and handling performance is further enhanced courtesy of lighter rims, with a new front rim 40g lighter and 60g saved with a new rear rim. The new rims are also shod with new Dunlop MX33 tyres for greater traction.

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Suzuki Racing

Electronics

Suzuki’s advanced Holeshot Assist Control and traction management systems are further improved for 2019, giving riders a better chance to get out of the gate ahead of the competition and stay ahead in the race.

Suzuki Holeshot Assist Control (S-HAC) was developed to give riders an advantage out of the gate, optimising ignition timing to help the launch be as efficient as possible. Two modes either advance or retard ignition timing, with riders able to select either depending on the surface.

Mode A retards ignition timing, giving a softer power delivery for use on hard surfaces or in slippery conditions, maximising traction. Mode B is for use in normal conditions on grippy dirt and advances the ignition timing for a more punchy launch. In both modes, S-HAC deactivates and ignition returned to normal timing after six seconds, when the rider shifts in fourth gear, or when the throttle is closed.

The updates to both modes make it easier to control engine speed before and during the launch and improve controllability accelerating towards the first corner.

A button and indicator light are mounted on the left handlebar. With the engine running, holding the button for 0.7 seconds will select mode A, and the indicator light will flash. Holding for 1.8 seconds will cause the light to flash faster, denoting the selection of mode B.

Once out of the gate and racing, the latest evolution of Suzuki’s traction management system helps the new RM-Z250 maintain an edge over its competition as the bike’s ECU monitors throttle position, engine speed, and gear position, with that data controlling ignition timing and adjusting the fuel injection rate to control engine output and optimise traction.

The system differs from road-based traction control in that it does not monitor rear wheel spin. It does not control traction once the tyre slips. Instead, it offers constant control that maximises traction the whole time it is functioning.

First introduced on the RM-Z450 in 2008, the system has been continuously honed and refined across Suzuki’s motocross range, with new ECUs promoting faster processing, as well as other new components including throttle bodies and updated intake systems enhancing performance.

For 2019 more ECU updates and the adoption of twin injectors further improve the system’s operation.

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Availability

The 2019 RM-Z250 will be available from authorised Suzuki dealerships in spring 2019, with pricing to be announced.

Words: Press Release | Lead Image: Suzuki Racing

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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