The 250 class in motocross doesn't forgive the slightest weakness. That's why we've completely redesigned the all-new 2019 RM-Z250 to achieve a higher level of performance in"Accerlation, Turning, and Braking" necessary to win in this ultra-competitive arena. Intensive work by our engineers has once again made the RM-Z250 the leader out of the gate, with a new engine featuring increased power across the board and class-leading electronics, a lighter frame and swingarm plus updated suspension for even better handling, a completely new styling design, and a laundry list of other updates to make it the most potent motocrosser in its class.
More Powerful Engine
A newly designed cylinder head combined with intake and exhaust port tuning and crankcase revisions to achieve an approximate 5% increase in output.
Dual Fuel Injection
The RM-Z250's fuel injection system now features two injectors. Instead of using a single injector that can compromise low-end fuelling in order to supply enough fuel for top-end power, the primary injector delivers precise low-rpm fuelling while a secondary injector at higher rpm provides the extra fuel needed.
Increased Fuel Pressure
Fuel pressure is increased by 17% over the previous model and promotes the effective mixing of air and fuel, resulting in improved throttle response.
The exhaust pipe was lengthened by 99mm, with the internal diameter tapering from ø 35mm at the cylinder head to ø 45mm at the muffler improving output throughout the RPM range, with bottom-end output most notably improved.
New Intake Camshaft
The Intake camshaft profile has increased lift for MY19 resulting in improved intake efficiency and increased power output.
Evolved Traction Management
The RM-Z250's electronic systems work seamlessly with the rider to get the power to the ground. To maximise traction for conditions, the engine control module (ECM) automatically adjusts ignition timing and fuel injection based on throttle position, engine speed and gear position.
Get a Good Start
Watch any raceday motocross interview, and you'll invariably hear "get a good start" cited as a must-do proposition. And getting holeshots is exactly what the latest version of the Suzuki Holeshot Assist Control (S-HAC) is all about. An integral part of the electronics package on the latest generation RM-Z range, the updated 3-stage S-HAC system assesses throttle position and gear selection, and then adjusts ignition timing to optimise engine output for fast launches.
The new RM-Z250's S-HAC monitors throttle position and gear position in order to adjust ignition timing for maximum acceleration through the three critical stages of a motocross start: the exact moment of launch, getting over the starting gate, and then powering up the start straight. Three settings are available, with A- mode intended for harder surfaces where controlling wheel spin is paramount, B- mode for normal dirt conditions with good traction, and an "off" setting.
The RM-Z250 is already known as one of the best-cornering motocross bikes available, but we went to work improving it even more for MY19. The frame and swingarm are all new, with the aluminium frame spars changing to a hollow square section that does away with an internal rib, shedding 370 grams while increasing torsional rigidity by 10 percent for better stability and bump absorption. Using a new hydroforming process for the aluminium swingarm permits a tapered cross-section without any welding, making the new assembly just as rigid with thinner walls for a weight loss of 80 grams.
Premium KYB Spring Fork and Rear Shock
The new KYB coil spring fork replaces the previous model's PSF2 air fork. Featuring a unique design that provides a progressive damping setup offering excellent compliance over small bumps while firming up deeper into the stroke to handle bigger hits such as harsh jump landings. Upper and lower triple clamp design has been optimised for rigidity while cutting 60 grams. Out back, the rear suspension linkage ratio has been changed to firm up short stroke movement while optimising longer suspension action for better traction, and is 14.9 grams lighter. The fully adjustable KYB shock has an improved range of adjustment, and a spring with thinner but stronger wire (feedback from MotoGP technology) that is 370 grams lighter than before.
In order to increase the RM-Z250's agility, the engine position was pivoted upward at the rear engine mount by 8.5mm measured at the crankshaft centre. The upper engine mount brackets are now aluminium instead of steel, and rather than four brackets suspending the engine from a single location, the 2019 RM-Z250 has four brackets on both sides of the engine. This not only drops another 90 grams, but also increases overall rigidity.
Dirtstar Rims, Dunlop MX33 Tyres & 270mm Front Wave Disc
New lighter Dirtstar wheels reduce all-important rotating mass by 40 grams up front, and 60 grams in the rear. For MY19, the RM-Z250 will be fitted with Dunlop's latest Geomax MX33 tyre that has generated rave reviews. The front brake disc diameter has been increased to 270mm and the brake pad material has been changed for more linear response characteristics as you brake harder.
In keeping with the signature design started by the 2018 RM-Z450, the 2019 RM-Z250 maintains Suzuki's distinctive "Beak DNA" styling. Intended to convey the brand's heritage of speed in our off-road bikes, the front fender and radiator shroud are arranged to form a straight line, with the sharp and edgy angles expressing a feeling of dynamic speed. Like the RM-Z450, the 2019 RM-Z250 is finished in the Team Suzuki off-road colours of yellow with blue accents, making the RM-Z line-up easily recognisable. And the styling is also highly functional, enabling the rider to shift weight forward or backward effortlessly.
Renthal Aluminium Fatbar
Fitted as standard equipment , the top-shelf Renthal aluminium Fatbar offers more strength and less vibration than standard size aluminium handlebars.
Rich & Lean Fuel Couplers
Riders can adjust the engine performance to suit varied track conditions. By plugging in either of two additional fuel-setting couplers, riders can opt for a richer-than-stock or leaner-than-stock fuel setting to make the most of any riding conditions. Included with the bike, these couplers can be easily plugged in trackside.
Suzuki Support Rider (SSR)
Racing is at the core of Suzuki. It is the thread that sews together Suzuki's heritage, the driving force that pushes product innovation, and the reason why countless riders have chosen to compete aboard Suzuki equipment. As Suzuki continues to define Australian racing, we are excited to announce the Suzuki Support Rider (SSR) Contingency program for 2018. Suzuki wants to give racers a real chance at being rewarded for their commitment and results by offering up to $900K in available contingency for National and State Motocross and Supercross, National and State Superbike and Supersport, Australian Off-Road Championship, Finke and Hattah desert races. Click Here to find out more.
Changes to the cylinder head and intake & exhaust port shape increases air flow by 7% compared to the previous model.
Air filter is 30% larger than the previous model; improving intake efficiency and increased power output.
The layout of the intake tube is changed from a curved to a straighter design increasing power output at all engine speeds.
The cam chain tensioner and adjuster have been tuned to reduce mechancial loss.
Conical machining to the wrist pin hole changes the distribution of load on the hole. This reduces stress on the piston crown, thereby improving durability.
The ratio for 2nd gear is changed to a higher gear ratio. In conjunction, the final reduction ratio is changed to 3.846 (50/13).
On the new RM-Z250, hexagonal pipe replaces the square pipe used for the seat rail on the previous model.
A change to the lever ratio suppresses short stroke movement while demonstrating positive long stroke characteristics.
The shape of the rear master cylinder adopts a design that better prevents dirt from getting inside and the rider’s boot from catching on it.
The new chain guide improves durability and reduces weight by 30g.