The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →The 2021 Kawasaki KLX300 is a street-legal dual-sport with a 292 cc fuel-injected single, six-speed transmission and 21-inch front/18-inch rear wheels. Kawasaki lists a 35.2-inch seat height and 302.1-pound curb weight. Below are the manufacturer’s specifications, plus the exact manual and parts references for the KLX300D/E. These details identify the KLX300 dual-sport, not the KLX300R trail bike or KLX300SM supermoto.
What the 2021 KLX300 is
Kawasaki classifies the KLX300 as a dual-sport motorcycle. The manufacturer describes it as “THE ULTIMATE LIGHTWEIGHT DUAL-SPORT”—marketing language rather than an independent assessment. The specifications below come from Kawasaki’s 2021 model information for its distributor territory and are not independent test measurements. Equipment and regulatory details can vary by market, so confirm the exact motorcycle’s configuration locally.
The engine is a 292 cc, liquid-cooled, four-stroke, DOHC single. Kawasaki lists fuel injection with a 34 mm Keihin throttle body, electric starting, CDI ignition, a six-speed return-shift transmission, wet multi-disc manual clutch and chain final drive. Bore and stroke are 78.0 x 61.2 mm, and compression ratio is 11.1:1.
2021 Kawasaki KLX300 specifications
| Specification | Kawasaki-listed figure |
|---|---|
| Engine | 292 cc, four-stroke, single-cylinder, DOHC, liquid-cooled |
| Fuel system | DFI; 34 mm Keihin throttle body |
| Transmission | Six-speed return shift |
| Front suspension | 43 mm inverted cartridge fork; adjustable compression damping; 10.0 in travel |
| Rear suspension | Uni-Trak gas-charged shock with piggyback reservoir; adjustable rebound damping and spring preload; 9.1 in travel |
| Front tire and wheel | 3.00 x 21 |
| Rear tire and wheel | 4.60 x 18 |
| Front brake | 250 mm petal disc; dual-piston caliper |
| Rear brake | 240 mm petal disc; single-piston caliper |
| Frame | High-tensile-steel box-section perimeter |
| Length x width x height | 86.6 x 32.3 x 47.4 in |
| Ground clearance | 10.8 in |
| Seat height | 35.2 in |
| Wheelbase | 56.7 in |
| Fuel capacity | 2.0 US gal |
| Curb weight | 302.1 lb |
| Listed colors | Lime Green; Fragment Camo Gray |
| Warranty | 12 months |
All figures in the table are Kawasaki’s published 2021 specifications, not independent measurements. Kawasaki defines curb weight as including necessary materials and fluids, a fuel tank more than 90 percent full, and a tool kit if supplied. Specifications are subject to change.
Do these 3 things before closing this tab:
1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitches#1 Best Overall
- LONG-LIFE PROTECTION: Engineered for up to 20,000 miles of protection and compatible with premium synthetic, conventional, and blended oil types.
- OUTSTANDING FILTRATION: Premium synthetic, high efficiency media with uniform pleats delivers exceptional filtration while maintaining high oil flow rates for better engine performance.
- EXTENSIVELY TESTED: Laboratory tested to ensure excellent capacity and burst strength.
- DIRECT FACOTRY REPLACEMENT: Made to be application specific (where applicable) & designed for easy installation.
How to identify the right manual
Kawasaki Owner Center identifies the 2021 owner’s manual as “Owner’s Manual, KLX300D/E (2021),” item 99803-0188. The corresponding service manual is “Service Manual, KLX300D/E,” item 99832-0181-04. Manual availability can change; Kawasaki notes manuals may sell out or become unavailable. Check the Owner Center for current availability and terms before ordering.
Finding replacement parts
Kawasaki’s 2021 KLX300 chassis electrical parts diagram includes a 12V 6Ah FTZ7S battery (part 26012-0907), 15A and 10A mini blade fuses, wiring leads, the main harness, a turn-signal relay, horn, and other relays and clamps. A diagram entry does not establish that a generic substitute or marketplace listing will fit.
Rank #2
- Fit For KLX300 & KLX300SM (2024-Present): Engineered specifically for KLX 300 and KLX 300SM models, this rear cargo carrier delivers a precise bolt-on fit with zero universal guesswork - clean lines, perfect alignment, every time
- Streamlined Design That Stays Out of the Way: A CNC laser-cut single tube frame keeps the rack low, tight, and visually clean. The KLX300 bike luggage rack adds genuine hauling capacity while ensuring your bike remains lightweight and nimble
- Welded for the Long Haul: Our cargo racks are professionally MIG welded with precise tolerances by a small Southern California manufacturer that rides the same bikes you do and are field-tested by veteran dual sport riders before production
- Finish That Actually Lasts: A dedicated 2-step powdercoating process bonds a thick, lightly textured industrial-grade coat to the steel frame - designed to outlast the thin, brittle finishes found on other KLX 300 accessories
- Ready to Work Right Out of the Box: Compatible with most dry bags and standard strapping systems, pairs with PMRACKS side motorcycle luggage rack set (sold separately), and features dual mounting locations for an auxiliary gas can mount. Includes stainless steel hardware
- Match the year and model code; the manual and parts references identify KLX300D/E.
- Confirm the part number and compatibility against the motorcycle’s VIN, market, and configuration with Kawasaki or a dealer.
- For recall status, use Kawasaki’s VIN-specific recall route. A model-level specification page cannot establish whether an individual motorcycle has an open recall.
What the published specifications do not tell you
Kawasaki’s model information provides published dimensions and equipment, but it does not establish real-world fuel economy, top speed, reliability, common failures, maintenance intervals, or rider impressions. For service intervals and safety procedures, use the applicable owner’s manual. For purchase or repair decisions involving recalls, check the specific VIN.
For comparison with another dual-sport, use the same model year and market and compare displacement and fueling, transmission, curb-weight definition, seat height, fuel capacity, wheel sizes, suspension travel and adjustability, ground clearance, brakes, warranty, and documentation availability. The figures here alone do not establish which motorcycle is the better choice.
Quick Recap
Best Value
- FITMENT: This luggage rack is compatible with KLX250S KLX250 KLX300 KLX250SF KLX300SM 2009-Present. NOT compatible with KLX300R
- FOR GASOLINE: The rear rack is specifically designed for gasoline packs. Able to meet different fixing ways. This rear rack does not come with a red gas can
- MULTIPLE FIXES: The hollow design of the rear seat frame increases the beauty while providing multiple fixed points. Meet mounting different items
- SMOOTH LINES: The shape of the KLX300 storage rack carrier fits the rear line of the bike
- ANTI SCRATCH: The rear rack is powder coating. More scratch-resistant than the general spraying process
Rank #4
- Fitment: 2021-2025 KLX300
- CONTENTS: Contains 2 Quarts Genuine OEM KPO Standard 10W-40 Engine Oil, 1 Genuine OEM Kawasaki 52010-1053 Oil Filter, 1 10MM Washer and 1 Convenient Disposable Funnel.
- QUALITY GUARANTEED: Keep your Kawasaki KLX300 running at MAX power with this Cyclemax Standard OEM Oil Change Kit, tailored specifically to have everything you need for models produced from 2021 to 2025! Experience worry-free riding with our expert fitment. Have questions? Our eager staff will gladly help you find the right kit for your ride!
- PROPER FITMENT RESEARCHED BY PROFESSIONALS: Our team of powersports professionals has done the research to make sure this kit fits the models listed. If there are any issues with your product please contact us for prompt and friendly customer service.
Rank #3
- IMPORTANT NOTE - Please check "vehicle fitment list" or description to make sure this model and year work for your bike before ordering. Be sure to strictly follow the installation instructions to check and test before riding, recommended that professionals install
- UNIQUE DESIGN - MZS Clutch Brake Levers use modern CNC and laser techniques which ensure a long life of the product and a good visibility of the laser graved logo, shape and design of the lever follow ergonomic viewpoints
- ADJUSTABLE REACH - By simply adjusting a setscrew on the MZS brake clutch lever, the reach can be adjusted to accommodate the smallest to the largest hands and gives the best clutch or brake response
- UNBREAKABLE - The beautiful shiny finish with anodized treatment CNC short lever improves corrosion resistance and hardness, and prevents bending and damage at the time of crash. And it is covered with the skidproof stripe which can enhance the touch feel and friction, not easy to slip on
- PREMIUM MATERIAL - MZS Motorcycle levers use chrome steel precision sealed bearings, stainless steel pivot and bushing parts, chrome slicon cantilever springs, CNC billet 6061 aluminum and chromoly fasteners
Official Kawasaki references
- Kawasaki 2021 KLX300 specifications
- Kawasaki Owner Center manuals and parts
- Kawasaki 2021 KLX300 chassis electrical parts diagram
- Kawasaki 2021 specification sheet (Spanish)
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
