Suzuki RM-Z250 2019: nata per vincere!

Scritto lunedì 10 settembre 2018 alle 15:05.

Suzuki RM-Z250 2019: nata per vincere
Suzuki presenta la sua nuova 250 da cross, che si rinnova completamente ispirandosi alla sorella maggiore RM-Z450.
Con un telaio e un forcellone disegnati ex novo e un motore aggiornato, la RM-Z250 2019 punta a primeggiare nelle competizioni a tutti i livelli e regalare intense emozioni agli appassionati nell’uso amatoriale.
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La Suzuki RM-Z250 2019 è pronta a debuttare e segnare una svolta epocale nel mercato delle moto da cross da un quarto di litro.
Dal 2004 a oggi la RM-Z250 ha raccolto consensi unanimi per la sua eccezionale guidabilità e molti la giudicano la moto più equilibrata dell’intero panorama crossistico mondiale. La RM-Z250 2019 raccoglie orgogliosamente questa eredità e sfrutta tutta esperienza ingegneristica Suzuki per alzare l’asticella delle prestazioni nella sua categoria.
Per ottenere nuovamente un bilanciamento perfetto i tecnici hanno operato a 360 gradi, seguendo un metodo di lavoro che ha già dato i suoi frutti anche nella MotoGP e tra le supersportive con l’ultima GSX-R. I progettisti hanno infatti cercato di operare in modo coordinato per portare a un livello superiore le performance della moto in tre momenti chiave della guida: “Run”, “Turn” e “Brake”, ovvero accelerazione, comportamento in curva e frenata

La RM-Z250 2019 ha le qualità per imporsi nelle gare e per diventare il punto di riferimento anche per tutti gli amatori che cercano un mezzo dal rendimento eccezionale ma sempre facile da controllare e affidabile.

Un equilibrio vincente

Suzuki ha concentrato i suoi sforzi per migliorare soprattutto la maneggevolezza e la rapidità in curva, due fattori determinanti per far scendere i tempi sul giro e per permettere al pilota di guidare con naturalezza in modo incisivo. Dietro questi risultati c’è in primis un leggero telaio in alluminio progettato ex novo, che vede crescere la rigidezza torsionale del 10% e ospita il motore in posizione leggermente rialzata, una scelta che incrementa l’agilità. Un’altra importante novità è il forcellone in alluminio idroformato a sezione variabile, alleggerito e collegato a un monoammortizzatore KYB dotato di differenti regolazioni a livello di molleggio. Anche il telaietto reggisella è riprogettato mentre ancora KYB è marchiata una nuova forcella a steli rovesciati con foderi dorati capace di copiare meglio le asperità.

Controllo totale

Gli interventi si traducono in un’impareggiabile precisione di guida su ogni terreno, ottenuta anche adottando nuovi pneumatici Dunlop MX33 e rivedendo la posizione di guida. Quest’ultima è più raccolta e aiuta a caricare meglio l’avantreno, in virtù della particolare conformazione del pregiato manubrio Renthal Fatbar in alluminio.

Le sovrastrutture derivate dalla RM-Z450 2018 lasciano grande libertà di movimento in sella e permettono ai piloti di tutte le corporature di controllare agevolmente la moto, in curva come nei salti o sulle massime pendenze.

La linea snella e filante esprime aggressività e dinamismo, con il parafango anteriore a becco che richiama un tratto tipico delle Suzuki da fuoristrada del passato assieme alla caratteristica livrea gialla e blu.

L’impianto frenante è aggiornato ed è ora più modulabile e potente, con il diametro del disco anteriore che passa da 250 a 270 mm e pastiglie realizzate con un diverso materiale.

Iniezione di potenza

La Suzuki RM-Z250 2019 gode di importanti aggiornamenti anche a livello meccanico, che portano a un aumento della potenza massima pari a circa il 5% e a una maggior disponibilità di coppia a tutti i regimi. Al di là dei valori assoluti, il motore garantisce una risposta più pronta alle rotazioni dell’acceleratore e ha un’erogazione incredibilmente progressiva e lineare, l’ideale per sfruttare appieno il suo potenziale, in gara come nelle uscite con gli amici.

Oltre che a una nuova testa per il cilindro, i tecnici di Hamamatsu hanno lavorato in particolare sul fronte dell’aspirazione. La RM-Z250 2019 ha valvole azionate da camme con un profilo rivisto ed è ora alimentata da un doppio iniettore, in luogo di quello singolo del modello 2018. Allo stesso tempo i condotti più rettilinei e le modifiche alla cassa del filtro riescono a portare più aria nella camera di scoppio, ben il 30% in più rispetto all’attuale modello. Anche lo scarico è nuovo, con un collettore più lungo e un silenziatore con una struttura innovativa nella parte interna, che giocano a vantaggio dell’elasticità ai bassi regimi. Quanto alla trasmissione, la rapportatura finale è leggermente più corta che in passato, mentre nel model year 2019 il cambio a cinque marce ha la seconda un po’ più lunga.

Partenze a razzo

Per gestire in maniera ottimale le partenze il pilota dispone dell’evoluto sistema Suzuki Holeshot Assist Control (S-HAC). Questo dispositivo sceglie sempre con la massima precisione i tempi di accensione e propone due mappe da selezionare in funzione del terreno da affrontare, entrambe aggiornate nelle logiche di funzionamento e molto efficaci nel dare il miglior spunto possibile all’uscita dal cancelletto.

Nelle altre fasi della guida l’elettronica supporta nuovamente la RM-Z250, grazie a un sistema di gestione della trazione affinato e più efficace che mai. Questa ingegnosa soluzione monitora il numero dei giri del motore, la posizione dell’acceleratore e la marcia inserita e sulla base di questi parametri interviene per dosare la potenza erogata. La sua azione migliora la motricità su ogni fondo e dà la possibilità a ciascun pilota di migliorare i suoi tempi sul giro in qualsiasi tracciato, rendendo la moto più facile e divertente.

Le prime consegne della Suzuki RM-Z250 2019 sono in programma all’inizio del prossimo anno.

 

2019 intake design.

2019 intake design.

2018 intake design.

2018 intake design.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Suzuki Releases Technical Information for All-New 2019 RM-Z250

Detailed technical information now available for the completely upgraded RM-Z250

Brea, CA (September 10, 2018) – Suzuki Motor of America (SMAI) is proud to release technical details for the all-new 2019 RM-Z250 motocrosser. The RM-Z250’s features and preliminary specifications are available on the SuzukiCycles.com website.

Redesigned for 2019, the updated RM-Z250 now mirrors the cutting-edge styling of the championship-caliber RM-Z450. An upgraded engine and list of chassis changes that achieve superior performance, were developed so the RM-Z250 remains the best handling 250 on the track.

The 2019 RM-Z250 features a new cylinder head that contributes to better throttle response and power, and a new dual injector EFI system that increases performance through the entire rev-range. Exceptional handling from a new, lighter aluminum frame and swingarm contribute to the RM-Z250’s advancement as well as a new KYB-supplied suspension that includes a new coil-spring fork. Race-ready Dunlop MX33 tires and improved braking performance increases stopping power and feel with a larger front brake rotor to help keep the rider in control.

Back in the pits, tuning the new EFI system for maximum performance is easy thanks to Suzuki’s proven fuel-coupler system.

Evolving the fundamental performance elements of ‘RUN’, ‘TURN’ and ‘STOP’ to a new level, Suzuki has infused the Winning Balance into the 2019 RM-Z250. With particular attention focused on advancing its ‘TURN’ capabilities, Suzuki engineers have achieved an even greater level of balance between the race-proven engine and the slim, nimble chassis to again raise the standard for cornering performance.

Key New Advancements to the 2019 RM-Z250

  • Increased Engine Performance
  • New cylinder head increases output and throttle response
  • New dual fuel injector system increases high rpm power
  • Evolved traction management system helps the bike hook up
  • Updated Suzuki Holeshot Assist Control (S-HAC) gets you out front
  • Greater Cornering Performance
  • New frame and swingarm balances lightness with strength
  • Engine placement and mounting aid chassis’ nimble handling
  • Coil spring KYB fork provides superb performance and easy tuning • New KYB rear shock and linkage deliver remarkable control
  • Race-ready, High-grip Dunlop MA33 Tires
  • Improved Braking Performance
  • Larger front brake increases stopping power and feel
  • New, compact rear master cylinder is designed to prevent mud from collecting on it and from catching
  • on the rider’s boots
  • Functional Styling
  • Aggressive new styling from the championship caliber RM-Z450
  • Narrow cockpit lets rider move with ease for maximum racing performance
  • Rider-friendly Tuning
  • Fuel couplers are included for quick and easy EFI tuning
  • Enlist in the RM ARMY and enjoy Suzuki Amateur Racing Support!

Suzuki’s RM Army and Amateur Racing Support is top notch, offering over $4 million in contingency, trackside support, and the opportunity to train with Ricky Carmichael at Suzuki’s exclusive Camp Carmichael. Want to see why champions choose Suzuki? Visit racesuzuki.com for more information on Suzuki’s Amateur Support Pro- gram and enlist in the RM ARMY!

Overview

Redesigned for 2019 and ready for battle, the RM-Z250 marries the sleek, race-ready appearance of the RM- Z450 with an upgraded engine and list of chassis changes to achieve superior performance. Using Suzuki’s “RUN, TURN and STOP” philosophy, factory engineers have made the 2019 RM-Z250 an even more formidable competitor.

The RM-Z250 has always set the standard as the best-handling 250 on the track. Now, the 2019 edition has more power, thanks to a host of changes that include a new cylinder head and dual injector EFI, to boost performance through the entire rev range. The frame and swingarm are new, as is the KYB-supplied suspension that includes a new coil spring fork. Strong brakes and ergonomically shaped bodywork that help keep the rider in control as the RM-Z250 carves up the racetrack.

Back in the pits, tuning the new EFI system for maximum performance is easy, thanks to Suzuki’s proven fuel-coupler system. Suzuki’s Winning Balance is again on display with the 2019 RM-Z250, as it again raises its own high standard for cornering performance.

Engine Features

  • Fitted with a new cylinder head and other improvements for 2019, the fuel-injected, 249cc, liquid-cooled, four-stroke, four-valve, DOHC engine remains proven and reliable.
  • The engine improvements result in greater power output with improved throttle response through the entire rev range.
  • The cylinder head features a new intake port shape and finish that fine-tunes the fuel/air charge into the combustion chamber to increase engine output.
  • A 30 percent larger air cleaner opening is combined with a more direct air cleaner outlet tube path into the throttle body for increased air ow.
  • The updated fuel injection system has extra-smooth power delivery, high fuel efficiency, superb reliability, and easy tuning capability.
  • The new throttle body eliminates complex control linkage so the rider feels a more direct connection to the engine.
  • For the first time on a Suzuki MX model, twin fuel injectors are used. The fuel/air mix created by both injectors improves charging efficiency and increases high rpm power.
  • The primary fuel injector is at the bottom of the throttle body and sprays fuel at the butterfly valve to improve fuel and air atomization. The secondary injector is positioned in the air cleaner inlet duct so the fuel and air have more time to mix and cool before entering the engine.
  • To feed the new twin-injector system and mix the fuel and air charge to improve throttle response, the new, high-capacity fuel pump has 17 percent more output pressure.
  • The new throttle body eliminates complex control linkage, so the rider feels a more direct connection to the engine.
  • The intake camshaft profile is new, with more valve lift, increasing power at all engine speeds.
  • The cam chain tension adjuster and guide have been redesigned to reduce friction and mechanical loss.
  • The compact aluminum cylinder is finished with Suzuki Composite Electrochemical Material (SCEM) coating for durability, light weight, and efficient heat transfer.
  • To increase reliability, the machining process at the piston pin holes is changed to reduce stress at the piston crown.
  • Engine starting remains simple, due to a proven kick-starter and automatic decompression system that works precisely and efficiently (eliminating the need for a heavy and costly electric start system).
  • The new, high- ow exhaust system has a longer head-pipe, tapered mid-section, and multi-layer silencer that has better  ow through the entire rev range, with an emphasis on low-rpm performance.
  • The new exhaust silencer is a four-layer design that enhances performance and maintains compliance with AMA sound regulations.
  • New resin engine protectors help guard the coolant pump (on the right) and the stator cover (on the left) from debris and stones.

Advanced Electronics

  • Suzuki’s proven, easy-to-use Fuel Couplers are included to simplify EFI tuning

For quick fuel adjustments to suit riding conditions, two couplers are provided. One is for a rich, and another for a lean fuel setting compared to the stock setting. Riders can change fuel settings in seconds by simply connecting either coupler to the wire harness.

The 2019 RM-Z250 features an evolved and faster traction management system. The Electronic Control Module (ECM) continually measures throttle opening, engine speed and gear position and then adjusts the ignition timing and fuel injector duration to  ne-tune the engine output to deliver the best traction for the riding conditions.

The RM-Z250’s traction management system is different from a street-bike traction control system as it does not measure rear tire spin. Because the needs of a motocrosser are different than a street bike, this system offers constant adjustment that maximizes traction at all times.

 
  • The Suzuki Holeshot Assist Control (S-HAC) is a selectable launch system derived from the factory race bike to help riders’ takeoff from the starting gate for an early lead.
  • To aid riders at the moment of launch, there are three stages of power adjustment from the S-HAC system; 1) the moment of initial launch, 2) when crossing the starting gate, and 3) acceleration up to full-speed.
  • There are three S-HAC modes riders can choose for the best option per their skill level and starting conditions. The launch settings for A-Mode and B-Mode are updated on the 2019 RM-Z250 to help the rider control engine speed during starts.
  • A-Mode: For hard surfaces or slippery conditions at the starting gate. In this mode, S-HAC alters ignition timing at the moment of launch and the ride over the gate to reduce wheel slip to deliver a smooth take off. It also advances ignition timing during this sequence for stronger acceleration. After 6.0 seconds or when you reach fourth gear, the system shuts off and returns to normal ignition timing.
  • Benefit of A-Mode: For novice riders, and/or hard and slippery traction conditions, use A-Mode for a more controlled launch.
  • B-Mode: When conditions at the starting gate have better traction, and a more aggressive launch is desired. S-HAC will advance the ignition timing to allow increased throttle response and stronger acceleration off the line. The ignition timing alternation is in a similar sequence as A-Mode, but with increased overall timing. One of three conditions will return the ignition to normal operation (whichever happens first): After 6.0 seconds or when you reach fourth gear, the system shuts off and returns to normal ignition timing.
  • Benefit of B-Mode: For skilled riders and/or good starting conditions, use B-Mode for a more
  • aggressive launch.
  • Base Mode: Standard power launch, no action required on the S-HAC switch.

Specifications and other information may change without notice.

Transmission & Drive Features

  • The five-speed transmission is updated with a new second gear ratio and overall final ratio to match the engine’s stronger output for better acceleration and top speed.
  • True to Suzuki transmission standards, the gear shift operation is smooth and precise. Carefully designed parts like the precisely machined shift cam and corresponding gears create a transmission a racer can rely on.
  • The multi-plate, wet-clutch uses a rack-and-pinion clutch release mechanism for precise feel of the engagement and disengagement points while riding.
  • The new, lighter-weight chain guide is shaped to accurately route the drive chain smoothly.

Chassis Features

  • The 2019 RM-Z250 features a new frame and swingarm design that continues Suzuki’s reputation for creating the best handling motocross motorcycles.
  • The new aluminum-alloy twin-spar frame combines cast and extruded sections to achieve superior front- and-rear weight distribution while balancing strength and weight.
  • The new frame is 370 grams (0.8 pounds) lighter, but has a 10 percent increase in torsional rigidity.
  • The position of the engine in the new frame is changed so the crankshaft sits higher in the chassis to further the bike’s nimble handling characteristics.
  • The design of the rear, upper engine mounts has been updated to a pair of mounts that are outboard of the cylinder head to increase rigidity and allow a direct intake path to the engine.
  • The engine mount material is changed to aluminum from steel to reduce weight.
  • The new swingarm is shaped using an innovative hydro forming process that maintains strength but reduces weight by 0.6 pounds (270 grams).
  • The new hydro forming process enabled engineers to create tapered swingarm beams that increased rigidity while reducing heavier assembly welding.
  • New hexagonal aluminum rails are used on the sub-frame for lighter weight, a slimmer appearance, and easier air  lter access.
  • The sub-frame rails are moved inward to slim the bodywork, but are also raised to provide additional space for the larger air cleaner.
  • Not only is the new sub-frame narrow, but all of the body work is slim so the rider can move freely in the cockpit, especially during spirited riding.
  • The new, KYB-supplied shock absorber has a thin-wire spring, spring guide, cushion rubber guide, and lower link that weigh less and have better movement reaction. The new spring and link weigh a pound (447.5 grams) less than the prior parts.
  • This KYB shock has new damping force circuits and a different rear lever ratio to improve the suspension’s traction characteristics.
  • The damping force adjusters have a wider tuning range so the settings can better match the conditions and the rider’s style.
  • A new, high-performance KYB coil spring front fork replaces the PSF2 Pneumatic Spring Fork previously used on the 2018 RM-Z250.
  • Both fork legs have the same springs and damping force components, so front suspension tuning and maintenance is balanced and easy: a great bene t during frequent riding.
  • This new fork uses a free-piston design that separates air and oil to optimize the damping characteristics. Other internal changes help control the damping cartridge’s pressure and spring recoil, so the fork action remains supple and precise.
  • The new Renthal aluminum tapered handlebar has a straighter bend (less pull-back) than prior models to help aid the rider during aggressive maneuvering.
  • A new, lighter upper fork bracket is used to complement the new front suspension and handlebars.
  • To improve stopping performance and feel, a new, larger 270mm, wave-style front brake rotor and a Nissin two-piston brake caliper are used.
  • The brake pad material is also changed to improve performance, plus the new front brake lever is a push rod type that more effectively transmits the squeezing force that the rider applies to the master cylinder.
  • A new design rear brake master cylinder hugs the frame beam to reduce dirt contamination and the chance of the rider’s boot touching it during riding.
  • The wheels feature black anodized D.I.D DirtStar rims with a new cross-section design that maintains strength while reducing un-sprung weight.
  • To match the handling potential of the 2019 RM-Z250, the wheels are fitted with the race-developed Dunlop Geomax MX33 tires. Additionally, the rear tire is nearly a half-pound (160 kg) lighter than the tire used on the prior RM-Z250.
  • Suzuki beak-inspired styling has sharp front fender and radiator shroud shapes that blend into the frame’s side covers and an upswept tail, to promote the impression of speed while reducing weight and easing service.
  • The functional styling and the motorcycle’s trim chassis permits a variety of rider positions that facilitate control and comfort.
  • In addition to the ergonomic improvements from the new bodywork, the rider’s foots pegs are moved 0.12 inches (3.3 mm) forward and 0.2 inches (5.2 mm) upward, while the handlebar grip position is moved 0.3 inches (7.4 mm) forward and 0.15 inches (3.8 mm) downward, to create a high level of rider-control during competition.
  • The new plastic fuel tank weighs a half-pound less than the prior model’s aluminum tank. Fuel capacity is raised to 1.7 US gallons.
  • The seat base, inner fenders, and side covers were developed to reduce moisture and dirt from reaching the air cleaner. This helps prevent debris from contaminating the air filter.
  • The new, slimmer seat has revised foam density to aid the rider’s control of the motorcycle. The seat weighs a half-pound less than the prior model’s and has a large gripper panel that runs nose-to-tail on the cover.
  • The Suzuki Championship Yellow bodywork is enhanced with distinctive striping and modern logo graphics.

Additional Features

  • A variety of Genuine Suzuki Accessories for RM-Z250 owners are available including a large selection of Suzuki logo apparel.
  • Learn more about Suzuki’s industry leading contingency, plus the RM ARMY and Amateur Support programs at www.SuzukiCycles.com/Racing.
  • For more details, please visit www.suzukicycles.com.

Specifications RM-Z250L9

Full Specifications & Service Data to be provided at a future date

Engine

Engine: 249cc, 4-stroke, liquid-cooled, single cylinder, DOHC

Bore x Stroke: 77.0 mm x 53.6 mm (3.0 1n. x 2.1 in.)

Compression Ratio: 13.75: 1

Fuel System: Fuel injection, dual-injector type

Starter: Primary kick-start with automatic decompressor

Lubrication: Semi-dry sump

Drive Train

Clutch: Wet multi-plate

Transmission: 5-speed constant mesh

Final Drive: Chain DID 520DMA4K 114L

Chassis

Suspension, Front: KYB AOS 48mm inverted telescopic, coil spring, oil damped, with adjustable damping force

Suspension, Rear: Link type, coil spring, oil damped Kayaba

Brake, Front: 270mm Nissin hydraulics, disc brake, single rotor

Brake, Rear: 240mm Nissin hydraulics, disc brake, single rotor

Tire, Front: 80/100-21 M/C 51M, tube type Dunlop MX33

Tire, Rear: 100/90-18 M/C 57M, tube type Dunlop MX33

Fuel Tank Capacity:  6.3 L (1.6 US gal.)

Color: Championship Yellow

Electrical

Ignition: Electronic ignition (CDI)

Dimensions

Overall Length: TBA

Overall Width: TBA

Overall Height: TBA

Wheelbase: TBA

Ground Clearance: TBA

Seat Height: TBA

Curb Weight: TBA

Key New Advancements for the 2019 RM-Z250

  • Increased Engine Performance
  • New cylinder head delivers increased output and throttle response
  • New dual fuel injector system increases high rpm power
  • Evolved traction management system helps the bike hook up on a variety of surfaces
  • Updated Suzuki Holeshot Assist Control (S-HAC) launches you out of the starting gate fast
  • Greater Cornering Performance
  • New frame and swingarm balances lightness with strength
  • Revised engine location and new mounts expands the chassis’ nimble handling 
  • Coil spring KYB fork provides superb performance and easy tuning
  • New KYB rear shock and linkage deliver remarkable control
  • Race-ready, High-grip Dunlop MA33 Tires
  • Improved Braking Performance
  • Larger front brake increases stopping power and feel
  • New, compact rear master cylinder is designed to prevent mud from collecting on it and from catching on the rider’s boots
  • Functional Styling
  • Aggressive new styling from the championship-caliber RM-Z450
  • Narrow cockpit and ergonomics lets rider move with ease for maximum racing performance
  • Rider-friendly Tuning
  • Fuel couplers are included for quick and easy EFI tuning
  • Pricing: TBA
  • Availability: February 2019