Sun Coast Cycle Sports stocks inspected used parts for the Kawasaki KLX300, the fuel-injected dual-sport that replaced the KLX250 starting in 2021. The KLX300 uses a 292cc liquid-cooled DOHC single-cylinder with electronic fuel injection (34mm throttle body), electric start, and a six-speed transmission producing approximately 26 horsepower. Based on the KLX300R trail bike platform, the dual-sport version adds lighting, mirrors, LCD instrumentation, and street-legal emissions equipment, bringing curb weight to approximately 304 pounds. Parts are individually photographed, assigned unique SKUs, and ship from our Odessa, Florida facility.
KLX300 generation and parts compatibility
| Model | Years | Engine | Key details |
|---|
| KLX300 (dual-sport) | 2021+ | 292cc single, EFI | Street-legal, LCD dash, metal tank, DOT tires, ~304 lbs |
| KLX300R (off-road only) | 2020+ | 292cc single, EFI | No street equipment, plastic tank, ~265 lbs |
| KLX300SM (supermoto) | 2021+ | 292cc single, EFI | 17-inch wheels, street tires, inverted fork, ABS available |
The KLX300 dual-sport has been produced from 2021 to present with minimal year-over-year changes beyond color options. All model years share the same frame, engine, and major components, so parts interchange freely across the production run. The KLX300 shares extensive compatibility with the KLX300R off-road model: engine, frame core, swingarm, and many chassis components are common between the two. The dual-sport version adds approximately 40 pounds of street equipment including lights, mirrors, metal fuel tank, LCD instrumentation, exhaust catalyst, and passenger pegs.
The KLX300SM supermoto uses the same engine but features 17-inch cast wheels, street-only tires, an inverted fork, and different suspension tuning. Engine parts interchange directly; wheels, forks, and suspension do not. The KLX300 is unrelated to the air-cooled KLX230 platform, which uses a completely different engine and frame design.
Common KLX300 failure points and replacement parts
Soft suspension: Like the KLX250 before it, the KLX300's OEM suspension is tuned for comfort and lighter riders. The fork offers 10 inches of travel with compression adjustment, and the rear shock provides 9.1 inches with both compression and rebound adjustability. Despite this adjustability, heavier or more aggressive riders will bottom the suspension on moderate trail obstacles. Aftermarket spring kits and revalving are common first upgrades.
Stock tire limitations: The Dunlop D605 dual-sport tires are a 50/50 street-dirt compromise. Riders who favor off-road use frequently swap to more aggressive DOT knobbies for better traction in loose conditions, while street-focused riders may prefer harder-compound enduro tires for longer tread life on pavement.
Weight for off-road use: At approximately 304 pounds with a full tank, the KLX300 dual-sport is noticeably heavier than the KLX300R trail version (approximately 265 pounds). The extra weight from street equipment makes the bike more fatiguing on technical single-track. Dropped bikes are prone to broken mirrors, bent levers, and cracked plastics. Hand guards and bark busters are common protective add-ons.
Highway limitations: The 292cc single can maintain highway speeds but is working near its limits at sustained 65+ mph. Extended highway use at high RPM accelerates chain, sprocket, and valve train wear. The KLX300 is best suited for mixed urban/trail riding rather than long-distance highway touring.
Commonly replaced KLX300 parts
- Fork springs and rear shock absorber
- Tires (trail or street-focused upgrades)
- Chain and sprocket sets
- Hand guards and bark busters
- Plastics, fenders, and side panels
- Skid plate and engine guards
- Brake pads and rotors
- Exhaust system and silencer
- Mirrors and levers (crash damage)
Frequently asked questions
Q: Do KLX300R dirt bike parts fit the KLX300 dual-sport?
Yes, for the engine and many chassis components. The KLX300 dual-sport and KLX300R share the same frame core and engine architecture. The primary differences are street equipment (lights, mirrors, instrumentation, emissions), a metal fuel tank on the dual-sport vs plastic on the R, and slightly different suspension valving. Engine internals, most frame hardware, and controls interchange directly between the two models.
Q: Will KLX250 parts fit the KLX300?
The KLX300 evolved from the KLX250 platform, but the engine displacement increased from 249cc to 292cc with higher compression (11.1:1 vs 11.0:1). Frame dimensions also changed slightly. Some peripheral components like controls and minor hardware may be compatible, but engine internals, plastics, and major chassis parts are KLX300 specific. Verify part numbers before attempting cross-platform fitment.
Q: Is the KLX300SM supermoto engine the same as the KLX300 dual-sport?
Yes. The KLX300SM uses the identical 292cc DOHC liquid-cooled single-cylinder engine with fuel injection. All engine internals, the ECU, and fuel system components interchange between the dual-sport and supermoto variants. The differences are chassis-related: the SM uses 17-inch cast wheels, street tires, an inverted fork, and a shorter suspension setup optimized for pavement.
Inspected by Powersports Technicians • Only One in Stock • Ships Fast from Florida
