The Suter MMX 500 is an all new 576cc V4 2-Stroke

It may be the year 2015 but that hasn’t stopped Swiss company Suter Racing Technology from producing a machine that harks back to the glory days of 500cc GP racing.  Called the Suter MMX 500, the 576cc V4 engine produces 195 horsepower yet weighs only 127 kg. Yes, that’s a power to weight ratio of 1.53 bhp per kilogram.

Suter Racing claims that the MMX 500 is the first ever V4 500cc two-stroke factory bike for the public. It’s actually been a long and arduous journey for the machine – it was first supposed to be sold as a Paton back in 2009 but that fell through. A few years later Suter tried to sell it under their own name as the SRT 500, but now it actually has finally made it to market. Since then it’s undergone further refinement and work to what it is today.

It’s been worth the wait. The frame is a CNC machined aluminium twin spar design with completely adjustable steering, wheelbase and ride height and the swingarm is also a fully adjustable aluminium member. Front and back features Öhlins suspension – both adjustable for pre-load, compression & rebound damping. The fairing is completely carbon fibre and for extra weight saving you can even get the wheels in magnesium.

But as impressive as that is, the real star of the show is the engine. The two stroke V4 features a double counter rotating crankshaft, 56 x 58.5 bore/stroke with redline of 13,000 rpm. All this is mated to a six speed cassette gearbox. Suter state the top speed is somewhere in excess of 310 kp/h…

Currently, only 99 of these machines are expected to be built which isn’t surprising given the asking price is 120,000 Swiss Francs (around $123,000 USD). But given this is nothing short of a state of the art two-stroke GP bike, it’s actually pretty good value.

Source: Suter Racing Technology

Yamaha Update 2016 Off-Road Range, Including New Two-Stroke Trail Bike

Did somebody say two-stroke? Yes, we did as Yamaha has taken the wraps of an all new machine, the YZ250X. Okay, it’s is based off the existing YZ250 motocross bike, but it does get a lot of GNCC-specific features (Yamaha’s words, not ours) such as an 18-inch rear wheel, sealed O-ring chain, off-road focused tires a standard side stand and fuel tank petcock with reserve position.

Other variations include narrow dimensions on the expansion chamber (vertically and horizontally), minor changes to the compression ratio, exhaust port tuning, ignition timing and the inclusion of a wide-ratio 5 speed gearbox to bring more versatility and flexibility to trails riders. It’s nice to see a two-stroke trails focused bike that’s not from Europe for a change.

The 2016 Yamaha YZ250X will be available in August, priced at $7,390 which is only $100 more than the YZ250 – a very small premium considering all the changes it receives.

Most of Yamaha’s existing lineup gets minor tweaks and refinements, while the YZ450F gets probably the most attention. Biggest upgrade is that it now comes with launch control. Additionally, Yamaha has modified the cam profiles for what they describe as improved low and mid range response. Also refined are the both the clutch and gearbox, the suspension gets revised settings and the front brake is now 270mm in diameter. It’ll be available later this month for $8,590.

 

KTM Revamps Two and Four-Stroke MX Lineup

KTM has announced a revamp of both its two and four-stroke motocross lineup, with less weight and more power the big takeouts from this announcement – word we always like to hear. The two-stroke 125 SX and 150 SX get the biggest changes, while the four-stroke 350 SX-F gets some nice upgrades as well.

The 125 SX and 150 SX get all new two-stroke engines. Within the heart of the new engine is a newly designed cylinder that has a bore of 54 mm. Apart from reworked ports, it features a newly developed power valve unit with a sophisticated mechanism for the lateral support exhaust ports. New 125 SX engine is more compact and is 4.4 pounds lighter than before while 150 SX engine loses four pounds of mass.

KTM says the over 90% of parts for the 125 and 150 updated bikes are new. Both models get a newly designed chassis with a new frame, subframe, footpegs, swingarm, linkage and rear shock to provide improved mass centralization and reduced weight for better handling.

The updates to the four-stroke SX-F range aren’t as dramatic, but still include as standard a state-of-the-art launch control system, an updated EMS with a faster ECU, as well as a new throttle body and different riding modes. The 350 SX-F gets the most attention and now has many of the features from the 250 SX-F Factory Edition released last year.

2016 KTM 125 SX Highlights

  • New 125 SX engine is more compact, is 4.4 pounds lighter and has more power for class dominance
  • New cylinder with revised ports and newly designed power valve unit with a sophisticated mechanism for the lateral exhaust ports gives a massive performance increase over the entire range
  • A new piston is optimized for maximum reliability with the new cylinder layout
  • Lighter crankshaft is optimally balanced for minimum vibrations
  • All-new die-cast engine cases raise the crankshaft and clutch shaft, centralizing mass and improving handling
  • New 6-Speed transmission provides the same gear ratios as before but is lighter and narrower
  • New “No Dirt” shift lever prevents dirt from fouling the lever joint to ensure proper shifting in any condition
  • New exhaust pipe has been tuned for the 125SX specifically to get maximum power output from the new engine
  • New lighter Chromoly steel frame provides higher torsional rigidity with less longitudinal stiffness resulting in improved handling and energy absorption
  • New smaller, lighter subframe design made with new aluminum profiles
  • New lighter swingarm features a revised internal structure to match the new frame characteristics
  • New lighter “No Dirt” footpeg design that provides a larger surface area and features a “scraper” to reduce dirt build-up in the hinge
  • New CNC machined upper triple clamp featuring a rubber damping system for the new Neken handlebar and ODI lock-on grips
  • The advanced WP 4CS (Four Chamber System) Fork has been specifically designed for Motocross and features revised damping settings optimized for the new chassis
  • New generation WP shock has been developed in conjunction with the new frame and swingarm architecture including a new linkage/pullrod system
  • Super lightweight Galfer Wave rotors, CNC machined hubs, high-end Excel rims fitted with Dunlop GEOMAX MX32 tires are standard equipment
  • New airbox and airfilter design offers maximum protection for the engine while ensuring maximum airflow and providing quick “no tools” airfilter changes
  • New ergonomics and bodywork centralize mass, improve handling and rider comfort

2016 KTM 150 SX Highlights

  • New 150 SX engine is more compact, weighs four pounds less and has more power for class dominance
  • New cylinder with revised ports and newly designed power valve unit with a sophisticated mechanism for the lateral exhaust ports gives a massive performance increase over the entire range
  • A new piston is optimized for maximum reliability with a reworked shape to fit perfectly with the new cylinder layout
  • Lighter crankshaft is optimally balanced for minimum vibrations
  • All-new die-cast engine cases raise the crankshaft and clutch shaft, centralizing mass and improving handling
  • New 6-Speed transmission provides the same gear ratios as before but is lighter and narrower
  • New “No Dirt” shift lever prevents dirt from fouling the lever joint to ensure proper shifting in any condition
  • New exhaust pipe has been tuned for the 150 SX specifically to get maximum power output from the new engine
  • New lighter Chromoly steel frame provides higher torsional rigidity with less longitudinal stiffness resulting in improved handling and energy absorption
  • New smaller, lighter subframe design made with new aluminum profiles
  • New lighter swingarm features a revised internal structure to match the new frame characteristics
  • New lighter “No Dirt” footpeg design that provides a larger surface area and features a “scraper” to reduce dirt build-up in the hinge
  • New CNC machined upper triple clamp featuring a rubber damping system for the new Neken handlebar and ODI lock-on grips
  • The advanced WP 4CS (Four Chamber System) Fork has been specifically designed for Motocross and features revised damping settings optimized for the new chassis
  • New generation WP shock has been developed in conjunction with the new frame and swingarm architecture including a new linkage/pullrod system
  • Super lightweight Galfer Wave rotors, CNC machined hubs, high-end Excel rims fitted with Dunlop GEOMAX MX32 tires are standard equipment
  • New airbox and airfilter design offers maximum protection for the engine while ensuring maximum airflow and providing quick “no tools” airfilter changes
  • New ergonomics and bodywork centralize mass, improve handling and rider comfort

2016 KTM 350 SX-F Highlights

  • The DOHC engine of the 350 SX-F features a completely new construction in order to make it even more compact and powerful.
  • New engine cases redesigned to centralize the rotating mass of the crankshaft and clutch while reducing overall length and weight
  • Completely reworked Keihin Engine Management System with new 44mm throttle body featuring a lightweight direct-connect design
  • New electronic Launch Control for efficient starts and multiple engine maps to control the overall power delivery
  • New cylinder head combustion chamber geometry, optimized ports, new camshafts, new timing, new finger followers and new valve springs for improved power and reduced weight
  • New lightweight forged bridged box-type piston by CP, new shorter connecting rod mated to a new shorter, stiffer crankshaft contribute to a light engine feel and strong power delivery
  • New 5-speed transmission features wider gears with a new surface treatment on the 2nd, 3rd and 4th gears along with a special low-friction coating on the shift forks to provide precise and easy shifting
  • New “No Dirt” shift lever prevents dirt from fouling the lever joint to ensure proper shifting in any condition
  • New CSS (Coil Spring Steel) one-piece clutch that has been completely redesigned for improved oil supply for better cooling, durability and lighter weight
  • New super-compact and lightweight 1.1lb Lithium-Ion starter battery
  • New WP flow optimized radiator design features a substantial improvement in engine cooling
  • New exhaust header and new lightweight  silencer are both designed to increase power and contribute to mass centralization
  • New lighter Chromoly steel frame provides 20% higher torsional rigidity with 30% less longitudinal stiffness resulting in improved handling and energy absorption
  • New smaller, lighter subframe design made with new aluminum profiles
  • New lighter swingarm features a revised internal structure to match the new frame characteristics
  • New lighter “No Dirt” footpeg design that provides a larger surface area and features a “scraper” to reduce dirt build-up in the hinge
  • New CNC machined upper triple clamp featuring a rubber damping system for the new Neken handlebar and ODI lock-on grips
  • The advanced WP 4CS (Four Chamber System) Fork has been specifically designed for Motocross and features revised damping settings optimized for the new chassis
  • New generation WP shock has been developed in conjunction with the new frame and swingarm architecture including a new linkage/pullrod system
  • Super lightweight Galfer Wave rotors, CNC machined hubs, high-end Excel rims fitted with Dunlop GEOMAX MX32 tires are standard equipment
  • New airbox and airfilter design offers maximum protection for the engine while ensuring maximum airflow and providing quick “no tools” airfilter changes
  • New ergonomics and bodywork centralize mass, improve handling and rider comfort

 

The Ronax 500 is a Street Legal Bike That Costs More Than a Porsche

Teased earlier this year, German company Ronax GmbH has officially unveiled its street legal weapon of mass destruction, the Ronax 500.  It harks back to the pre-2002 days of Motorcycle Grand Prix racing, and as such is powered by a 160bph, V4 two-stroke.  Yes, two-stroke.  That alone will get some excited (or terrified).  In addition to the engine, there’s a bit of hero worship going on here to a Mr Valentino Rossi, as not only does the bike somewhat resemble the Honda NSR500 that Rossi won his first GP championship on, but also the fact that only 46 of these bikes will be made available for sale.

Now, before you get too excited, there’s a little thing about the price.  As it says in the headline, this thing costs more than many high-end sports cars.  The price?  Around $135,000.  No, that’s not an extra zero in there by mistake.  And for that price, you don’t get ABS, you don’t get traction control, but you do get two(!) throttle settings, being sport and rain.

Other technical details are that it has a twin-spate frame, 43mm Ohlins upside-down fork, TTX rear shock, forged aluminum wheels, Brembo brakes and carbon fibre bodywork.  You know, all the expensive stuff you expect on a bike that costs as much as a house in some places. The dry weight is 320 pounds.

Looks wise, it does have a very 1990’s vibe, and a highlight would have to the Cylon like headlight hidden in the front cowl air intake.  Upon checking the Youtube video of the bike below, I’m not sure if a kickstand is included.

If you’re interested, head on over the Ronax website and express you’re interest in purchasing one, or maybe a pair.