Suzuki RM-Z250 Specs, Horsepower & Performance Review
TL;DR
- The 2026 Suzuki RM-Z250 is a 249cc, fuel-injected, four-stroke motocross bike with a claimed curb weight of 233 lb and an $8,299 MSRP.
- A recent dyno test measured 36.0 hp and 18.2 lb-ft of torque, a mellow powerband that suits novice and intermediate racers.
- It’s a closed-course bike, so there’s no official top speed or 0-60 time. Power, gearing and suspension are the numbers that matter.
- Standouts are the dual-injector EFI, the MX-Tuner 2.0 phone app and an aluminum frame with adjustable KYB suspension.
- The main drawback is modest peak power, so riders chasing outright speed will want an aftermarket tune or exhaust.
The Suzuki RM-Z250 is a yellow 250cc four-stroke motocross bike for racers who value handling and a controllable engine over raw output. The 2026 model is a mechanical carryover with new all-yellow bodywork. Here are the verified specs, measured horsepower, gearing, suspension and the trade-offs to weigh before you spend $8,299.
2026 Suzuki RM-Z250 Specs at a Glance
| Spec | Detail |
|---|---|
| Engine | 249cc, liquid-cooled, DOHC, four-stroke single |
| Bore x stroke | 77.0 x 53.6 mm |
| Compression ratio | 13.75:1 |
| Fuel system | Dual-injector EFI, 44 mm throttle body |
| Transmission | 5-speed constant mesh, wet multi-plate clutch |
| Final drive | DID 520DMA4K chain, 114 links |
| Starting | Primary kickstarter with automatic decompressor |
| Front suspension | KYB inverted fork, adjustable damping |
| Rear suspension | KYB link-type shock, adjustable preload and damping |
| Brakes | Single-rotor disc, front and rear |
| Tires | Dunlop Geomax MX33, 80/100-21 front, 100/90-19 rear |
| Wheelbase | 58.46 in. |
| Ground clearance | 13.0 in. |
| Seat height | 37.5 in. |
| Curb weight (claimed) | 233 lb. |
| Fuel capacity | 1.66 gal. |
| MSRP | $8,299 plus destination |
Source: Suzuki Motor USA 2026 specification sheet; Dirt Rider engine specs for throttle body size.
How Much Horsepower Does the Suzuki RM-Z250 Make?
The RM-Z250 makes about 36 hp at the rear wheel. Dirt Rider’s in-house dyno measured 36.0 hp and 18.2 lb-ft of torque on a 2025 RM-Z250 RM Army Edition fitted with the Pro Circuit T-6 exhaust (Dirt Rider, 2025). Suzuki’s spec sheet doesn’t list a horsepower figure.
An earlier test on the same dyno, with a Dunlop D404 street tire on the rear, recorded 36.7 hp at 12,300 rpm and 18.3 lb-ft at 9,100 rpm (Dirt Rider, 2023). Dyno results shift with tire, gear and exhaust, so read them as a range.
The test rider described the power as manageable and tamer than the top of the class, with enough punch for most buyers. In practice the engine pulls smoothly from the low and mid range and doesn’t punish a late shift. That’s forgiving for a newer racer. A pro will find speed left on the table without a tune.
Does the Suzuki RM-Z250 Have a Top Speed?
There’s no verified top speed for the RM-Z250. It’s a closed-course motocross bike, Suzuki publishes no top speed, 0-60 time or quarter-mile figure, and no instrumented test turned up in our search. Any number you see online is an estimate, so don’t rely on it.
The gearing explains why. A 5-speed constant mesh gearbox and a 114-link DID 520DMA4K chain are set up for hard acceleration out of corners and over jumps, not sustained high speed. Suzuki’s spec page doesn’t list gear ratios, so check the owner’s manual for the stock sprocket sizes.
Sprocket changes are the usual way racers fine-tune gearing for a given track. A tighter infield wants a shorter final drive; a fast, open layout can use a taller one.
What Engine and Electronics Does the 2026 RM-Z250 Use?
The 2026 RM-Z250 uses a 249cc liquid-cooled DOHC single with four valves, a center-port cylinder head and a dual-injector fuel injection system. Compression is 13.75:1, with a 77.0 x 53.6 mm bore and stroke. Starting is by kickstarter with an automatic decompressor.
Suzuki’s MX-Tuner 2.0 smartphone app lets you adjust fuel injection and ignition for different tracks and conditions. Holeshot Assist Control and a traction management system help the rear tire hook up off the line (Suzuki Motor USA, 2026).
Plug-in fuel couplers are included, so you can switch fuel maps in seconds without a laptop. Spark plug is an NGK CR8EIB-10, and the clutch is a wet multi-plate unit with a light lever pull.
How Do the Chassis and Suspension Ride?
The RM-Z250 has a light aluminum frame and a reputation for sharp handling, which is where Suzuki’s “Run, Turn, Stop” philosophy shows up. Suzuki says the frame has about 10 percent more torsional rigidity than the previous generation, with better front-to-rear weight balance.
Suspension is KYB at both ends. The inverted fork has adjustable damping. The link-type rear shock adds adjustable spring preload. Suzuki’s spec page doesn’t list suspension travel, so confirm that figure with a dealer before you quote it.
Braking comes from a single disc at each wheel. Tires are tube-type Dunlop Geomax MX33s, an 80/100-21 up front and a 100/90-19 in back.
Wheelbase is 58.46 in. and ground clearance is 13.0 in. The 37.5 in. seat height is tall, so sit on one before you buy. At a claimed 233 lb, it’s easy to flick through a rutted corner.
Who Should Buy the RM-Z250, and What Are the Drawbacks?
The RM-Z250 suits novice and intermediate racers and privateers who want predictable power and a planted chassis. The 2026 price is $8,299 (Cycle News, 2025), plus a destination charge and any dealer fees, so get an out-the-door quote.
Suzuki is again offering a limited number of RM Army Edition packages, which include a Pro Circuit T-6 titanium exhaust at no extra cost. Ask your dealer whether the offer is still running.
Here are the honest drawbacks. Peak power is modest, so top-level racers will likely spend money on tuning. The seat is tall. There’s no electric start, and the bike is sold for closed-course competition only, so it can’t be plated for the street.
If you want a forgiving track bike with a strong chassis and phone-based tuning, it’s a solid buy. If you want maximum horsepower out of the crate, it isn’t.
Frequently Asked Questions About the Suzuki RM-Z250
How much horsepower does the 2026 Suzuki RM-Z250 have?
Suzuki doesn’t publish a figure. Dirt Rider measured 36.0 hp and 18.2 lb-ft of torque on its dyno with the RM Army Edition exhaust. Expect roughly 36 hp at the rear wheel in stock-style trim.
What is the Suzuki RM-Z250 top speed?
There’s no verified top speed. The RM-Z250 is a closed-course motocross bike, and Suzuki publishes no top speed or 0-60 figure. Its short gearing is built for acceleration, not highway speed.
How much does the 2026 Suzuki RM-Z250 weigh?
Suzuki claims a curb weight of 233 lb (106 kg). The fuel tank holds 1.66 gallons.
Is the Suzuki RM-Z250 street legal?
No. It’s a competition motorcycle sold for closed-course use only. It isn’t sold for public-road use.
Is the Suzuki RM-Z250 good for beginners?
It’s better for novice racers than for a total first bike. The power is manageable, but the 37.5 in. seat is tall and the bike is race-focused with a kickstarter. New riders should sit on one first.
