• Home
• Suzuki
• TM250
• 1973

Suzuki TM250 1973 Parts & Accessories

Manufactured from 1971 through 1975, the Suzuki TM Series was Suzuki's first dedicated line of production motocross racing motorcycles. Capitalizing on Suzuki's World Championship motocross victories with legendary riders Joel Robert and Roger DeCoster, the TM series bridged the gap between dual-sport trail bikes and purpose-built competition racers. The lineup was anchored by the infamous TM400 "Cyclone," an open-class machine notorious for its explosive power delivery and unpredictable electronic CDI advance curve, alongside the mid-weight TM250 "Champion". Built with chrome-molybdenum or tubular steel frames, high-mounted swept exhaust pipes, minimal bodywork, and lightened engine internals, the original TM machines laid the structural groundwork for Suzuki's highly successful RM series that replaced them in 1976.

• Engine Configurations: 246 cc (TM250) or 396 cc (TM400) air-cooled piston-port 2-stroke single-cylinder engines
• Power Output: ~30 HP @ 7,000 RPM (TM250) and ~40 HP @ 6,500 RPM (TM400 Cyclone)
• Induction & Ignition: Mikuni VM32/VM34 carburetors with Suzuki Pointless Electronic Ignition (PEI) featuring steep automatic spark advance
• Chassis Architecture: Tubular steel/chromoly double-cradle frame with high-clearance skid plate and aluminum alloy wheel rims
• Front Suspension: Telescopic coil-spring oil-damped front forks providing 170 mm (6.7 in) wheel travel
• Rear Suspension: Steel swingarm with dual hydraulic Kayaba shock absorbers offering 5-way adjustable spring preload
• Braking System: Lightweight internal expanding mechanical drum brakes front and rear
• Transmission & Drivetrain: Close-ratio 5-speed manual transmission with heavy-duty wet multi-plate clutch and chain drive
• Wheels & Tires: 3.00-21 front and 4.00-18 / 4.50-18 rear knobby motocross racing tires
• Dimensions & Mass: 830 mm (32.7 in) seat height; dry weight of 102 kg (225 lbs) (TM250) and 108 kg (238 lbs) (TM400) with a 8.5-litre (2.2 US gal) aluminum fuel tank

Expanding the platform to cover youth and lightweight competition divisions, the Suzuki TM Small-Bore Range (TM75 / TM100 / TM125) was introduced between 1972 and 1974. Highlighting the lightened TM75 "Mini-Cross," the TM100 "Contender," and the highly competitive TM125 "Challenger," these small-bore racers brought authentic motocross geometry and power characteristics to junior and entry-level racers. Featuring scaled-down double-cradle steel frames, lightweight aluminum rims, high-rpm piston-port or reed-valve two-stroke engines, and manual multi-speed gearboxes, the small-displacement TMs provided young riders with a direct path into organized motocross scramble racing.

• Engine Options: 72 cc (TM75), 98 cc (TM100), or 123 cc (TM125) air-cooled 2-stroke single-cylinder engines
• Power Output: ~6 HP @ 7,000 RPM (TM75), ~13 HP @ 8,000 RPM (TM100), and ~20 HP @ 9,500 RPM (TM125)
• Induction & Fueling: Mikuni VM-series carburetors (19 mm to 28 mm) utilizing pre-mix fuel/oil lubrication and flywheel magneto ignition
• Chassis Architecture: High-tensile tubular steel double-cradle frame with upswept expansion chamber exhaust
• Front Suspension: Leading-axle or conventional telescopic hydraulic front forks
• Rear Suspension: Steel swingarm with dual hydraulic rear shock absorbers featuring adjustable spring preload
• Brakes: Front and rear hand- and foot-actuated internal expanding mechanical drum brakes
• Transmission & Final Drive: 4-speed (TM75) or 5-speed (TM100 / TM125) manual transmission with wet multi-plate clutch and chain final drive
• Wheels & Tires: 16-inch or 19-inch front knobby tires and 14-inch or 18-inch rear knobby tires on steel or aluminum rims
• Dimensions & Mass: Seat heights ranging from 710 mm (28.0 in) to 800 mm (31.5 in); dry weight ranging from 64 kg (141 lbs) (TM75) to 88 kg (194 lbs) (TM125)