2021 · Enduro · Buyer's Guide
Light Enough To Follow Anywhere
The KLX 300 is built around a 292 cc liquid-cooled single with fuel injection, and the rest of the bike is arranged to suit what that motor does well. The numbers stay modest at 26 hp and 18 lb-ft, but the useful pull sits low in the rev range, which is exactly where a trail bike spends its life. Around it you get a steel double cradle frame, a 21-inch front wheel and an 18-inch rear, 10.8 in (274 mm) of ground clearance, and suspension you can adjust at both ends. It looks like a dirt bike because it is one.
On the trail it asks very little of you. At 302 lb (137 kg) wet it stays light on its feet, the long travel front and rear takes the sting out of rocks and ruts, and the power delivery never punishes a tired rider late in the day. Running costs stay low and most routine work is a driveway job, though this bike wants an owner who checks fasteners and plastics after rough days out. The honest limits are physical: a 35.2 in (894 mm) seat, a 2.0 gal (7.6 L) tank, 81 mph (130 km/h) flat out, and no ABS.
Spec sheets don't ride bikes, but they set the baseline.
| Power | 26 hp (19 kW) |
|---|---|
| Torque | 18 lb-ft (24 Nm) |
| Displacement | 292 cc |
| Engine | Single-cylinder |
| Cooling | Liquid-cooled |
| Gearbox | 6-speed |
| Final drive | Chain |
| Front tire | 3.00-21 |
| Rear tire | 4.60-18 |
| Ground clearance | 10.8 in (274 mm) |
| Front travel | 10.0 in (254 mm) |
| Rear travel | 9.1 in (231 mm) |
| Seat height | 35.2 in (894 mm) |
| Wet weight | 302 lb (137 kg) |
| Fuel capacity | 2.0 gal (7.6 L) |
| Top speed | 81 mph (130 km/h) |
Equipment check
Chassis
This section isn't a ride report. It's what I've picked up over years of listening: paddock conversations, owners talking at club nights, riders comparing notes after a day out, and the messages that land in my inbox directly. For the KLX 300 the chatter runs unusually consistent. The praise clusters tight around how the bike behaves, and the complaints stay narrow and specific.
The one thing riders mention more than any other is how little the bike intimidates them. It turns into tight trails without argument, and newer riders say they can manage it without the machine dictating terms. Plenty also talk about the motor's willingness to rev, a quick-spinning character that pays back a rider who pushes. Owners who link trails with road miles say it holds highway speeds without complaint.
The gripes come from fewer voices, but they repeat. Heavier riders find the stock fork springs too soft, with the front diving and bottoming out on bigger hits. Some owners describe the seat and riding position wearing on them over a long stretch of pavement, enough to arrive tired. On high-mileage examples, a few report valve cupping, showing up as lost performance and ending in top-end work.
Transmission shift fork failure
A few owners reported losing second gear at very low mileage due to an incorrectly machined shift fork; dealer repair often involves splitting the cases.
Electrical gremlins (no-start, dead display)
Multiple reports of sudden power loss, flickering dash, and complete electrical failure, often traced to main fuse, wiring, or connections.
Fuel delivery problems causing rough idling or hard starting
Some owners report fuel delivery issues, leading to poor performance, rough idling, or difficulty starting, possibly due to clogged fuel injectors or fuel pump problems.
Spongy brake feel
Some riders report a spongy brake feel, often caused by air in the brake lines or worn brake pads. Regular bleeding and pad replacement can restore braking performance.
Plastics cracking and hardware loosening
Some owners report that bodywork plastics can crack after rough off-road use, and various fasteners may come loose over time, requiring regular inspection and tightening.
Where this Kawasaki KLX 300 pulls ahead of — or falls behind — its rivals on the numbers, and the typical bike in its class on character.
Power
Torque
Displacement
Wet weight
Top speed
Seat height
Forget spec-sheet bragging. Here's who the KLX 300 is actually built for.
For technical day rides on slickrock and sand this is the right size of machine: light, tall-legged and forgiving down low. Build the day around that 2.0 gal (7.6 L) tank and it works.
Made for Bar M / Kane Creek · Imperial Sand Dunes · Johnson Valley OHV Area
The dirt sections of a BDR suit it well. Highway transfers and fuel range are where the compromise shows, so it fits shorter days, a bigger tank, or a route planned around the stops.
Made for AZBDR — Arizona Backcountry Discovery Route · California BDR South · COBDR — Colorado Backcountry Discovery Route
If you're cross-shopping the older generation, here's what changed.
Previous generation · 2009–2017
Quiet, Light, Bulletproof Enduro
Compare to the previous model →If this one isn't quite the fit, these are the bikes worth riding back-to-back against it.
Any price note compares both bikes at the same age — the youngest age both have on the used market — against this Kawasaki KLX 300. “cheaper/pricier” is what that bike costs second-hand, not how worn it is.
Competitor · 2025
The Rally-Ready Daily Rider
Roughly $1,000 pricier used than this bike at 1 yr
Competitor · 2021
Cheap To Run, Hard To Kill
Roughly $1,600 pricier used than this bike at 4 yr
Competitor · 2025
The Enduro Name Fully Earned
About the same used price as this bike at 1 yr
Similar Character · 2020–2026
Light, Honest, Goes Anywhere
~$1,100 cheaper used than this bike