Highlights of the Suzuki RM-Z250 (MY25)

The 250 class in motocross doesn’t forgive the slightest weakness. That’s why we completely redesigned the RM-Z250 to achieve a higher level of performance in “Acceleration, 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 the engine featuring increased power across the board and class-leading electronics including WiFi tuning capability, a lighter frame and swingarm plus updated KYB suspension for even better handling, modern styling design, and a laundry list of other updates to make it the most potent motocross bike in its class.

Features

Engine

Fitted with a center-port cylinder head, the fuel-injected 249cm³ liquid-cooled, 4-stroke, 4-valve, DOHC engine remains proven and reliable. The engine delivers strong peak power and superb throttle response through the entire rev range.

• Cylinder Head Design: Centre-port cylinder head design contributes to increased output and throttle response by approximately 5%.
• Dual-Fuel Injectors: The 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.
• Bi-Directional Quick Shifter: When activated, this standard-equipment system lets you shift up or down without operating the clutch lever while in motion. Features include clean upshifts with smooth acceleration and downshifts that are also quick and easy, thanks in part to automatic blipping and engine braking working together. The gear shift linkage system load rate is optimised to provide a solid, satisfying click with each shift that assures you the gearbox has responded immediately to your action.
• Increased Fuel Pressure: Increased by 17% over the previous model and promotes the effective mixing of air and fuel, resulting in improved throttle response.

Electronics - Suzuki Holeshot Assist Control (S-HAC)

All the power in the world won’t do any good if you can’t transfer it to the ground, and Suzuki’s innovative electronics work transparently with the rider for maximum acceleration on any type of dirt or track conditions. Suzuki’s third-generation traction management system, with a significantly updated S-HAC (Suzuki Holeshot Assist Control) system and more powerful ECM (engine control module).

Suzuki’s RM-Z250 goes another step further with the fourth-generation system featuring updated ECU software. The RM-Z250’s S-HAC system monitors throttle position and gear position in order to adjust ignition timing for maximum acceleration through the three critical stages of a motocross start: releasing the clutch, getting drive over the starting gate, and then powering down the start straight.

MX Tuner 2.0: Standard with every new MY24 RM-Z purchased, the plug and play MX Tuner 2.0 allows users to alter the engine mapping via the intuitive smartphone WiGET app, available on iOS and Android devices. The WiGET app comes with several pre-installed factory-developed maps for easy tuning for different riding styles and track conditions. In just a few minutes the power delivery can be altered for softer delivery settings for hard packed surfaces or dial-in maximum power for deep, loamy conditions and amazing drive out of the corners. For the more experienced tuner, the possibilities are practically endless with the ability to create fully customised maps with specific settings for 36 points of ignition timing and 36 points of fuel injection delivery.

Chassis - 49mm SHOWA Spring Fork & BFRC Shock

The RM-Z450 is equipped with the latest SHOWA front and rear suspension components, delivering improved responsiveness and traction, enhanced ability to absorb impacts, better chassis stability, overall feedback to the rider, terrain feel and improved comfort.

Up front, an updated 49mm Showa coil-spring fork based on works A-type design replaces the previous air fork design. Performance has been increased significantly and offers a more consistent feeling throughout a moto. Bike set-up and daily maintenance is also much easier for a wider range of riders.

The Balance Free Rear Cushion (BFRC) rear shock design shares technology with Suzuki’s flagship GSX-R1000R sportsbike. The design balances pressure above and below the piston to better control the stroke and smooth out reactions to bumps and chop, even under severe braking.