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Common Tread

Which sub-400 cc sportbike is right for you?

Mar 30, 2015

After last week's review of the 2015 Yamaha YZF-R3, I've spent a lot of time answering questions comparing it to the Honda CBR300R, Kawasaki Ninja 300, and KTM RC390

I touched on it briefly in the review, but the more I've thought about it and talked to readers about it, the more I've come to realize there really isn't a clear winner. I can't just choose one and say, "This is the bike everyone should buy." I spent what felt like a year putting the specs into a nice chart down below for easy comparison (so you better read it), but beyond the specs, I broke down my thoughts about the bikes by category.

The 2015 KTM RC390. KTM photo.

Comfort and feel

While it may stand to reason that all four of these options should be relatively similar, my six-foot frame says otherwise. I found the Honda and Yamaha to be incredibly comfortable, but not so with the Kawasaki. The Honda and Yamaha also felt more solid and of a higher quality, where the Kawasaki felt a little cheap (it doesn't help that the engine has to spin up quite high to find power).

The main thing that holds me back in comparing these bikes is that I've only ridden the three Japanese bikes. KTM doesn't believe people read the internet, so they haven't yet offered me a chance to ride or even sit on the RC390. But KTMs are known for being so "race ready" that they forget to make any effort to insulate riders from engine vibrations, which can make for a jarring ride (a month borrowing a buddy's Duke 690 confirmed this). Pair that with KTM's love for making seats out of wood, and I feel pretty comfortable in predicting that the Katoom is probably less comfortable than the Honda or Yamaha, especially on the freeway.

Tires and suspension

Honda CBR300R
The 2015 Honda CBR300R. Honda photo.
The Honda and KTM come with nicer radial tires, while the Kawasaki and Yamaha are back in the dark ages of bias ply. Many buyers won't mind upgrading, but if you're looking to buy something and ride it stock, this is a big win for the Honda. The tires on the Yamaha actually weren't too terrible, but the ones on the Kawasaki would definitely be changed ASAP, if it found its way into my garage permanently.


This is a tough one to call without having ridden the KTM, but both the Honda and the Yamaha handle excellently. Despite being given a fairly dainty and budget fork, the Honda just works and works well. I spent a day flogging one around the Streets of Willow track and had an absolute blast, though the small fork did flex a bit under the harsh conditions. The bigger fork on the Yamaha helped keep it feeling slightly more planted and rigid under heavy braking or at high speeds, but both are about as good as it gets for street riding. The KTM's higher spec WP unit should best both, but it is really only necessary if you plan to track the thing a bunch (which you definitely should).


It should come as no surprise that the KTM's 373 cc single cylinder, with its displacement advantage, is the king of the hill when it comes to power. Compared to the smallest engine (the Honda's little 286 cc single), it makes a whopping 33 percent more horsepower and 25 percent more torque. The interesting number here is the Kawasaki's low torque figure, which is why the Ninja will feel like the slowest to new riders who aren't used to chasing power in the higher end of the rev range. Despite the Honda's unimpressive horsepower number on paper, its single makes that power at much lower RPMs than the other Japanese bikes, which means it feels great in real-world riding conditions. The Yamaha's added displacement means that, even though it's a twin, it has enough power down low to keep you from having to chase it too much.

Kawasaki Ninja 300
The 2015 Kawasaki Ninja 300. Kawasaki photo.

Race readiness

While the tires on the Kawasaki failed to impress, the inclusion of a slipper clutch is a huge win for those who plan to take their sub 400 cc sportbike to the track. If you're doing that, you're going to change the tires, anyway. Depending on what sort of classes are available, the Kawi makes for the best track toy under 300 cc and, depending on what you do to the engine, could best the Yamaha, given the importance of that slipper. The KTM also comes with a slipper, but with its 80 cc advantage, probably won't find itself in the same racing class. And here you thought I was going to leave the Kawi out in the cold...

Yamaha R3
2015 Yamaha YZF-R3. Yamaha photo.

Fuel economy

The Honda's single is the clear winner when it comes to fuel economy. With an average fuel consumption of 71 mpg, it trounces the competition. The twins in the Yamaha and Kawasaki both return a reported 56 mpg, while the KTM's single "only" gets 50 mpg.

Maintenance costs

While my first instinct was to believe that the KTM would have higher maintenance costs than the Japanese competition, it turns out it's the Kawasaki that has the highest maintenance costs (assuming you scrupulously follow the user manual). Although its service intervals are longer at 7,600 miles, the requirement for a valve check at each service interval negates the benefits. The KTM actually isn't terrible, with 4,700 miles between services and 9,300 between valve checks. In the end, the Yamaha's 26,600-mile intervals between valve checks bests the rest by a solid margin, making it the cheapest to maintain.

Bang for your buck

Obviously, all of the options here are well priced. I actually expected the KTM to come in quite a bit higher, but at only $200 more than the Ninja (with ABS), the price is really impressive, given the higher spec suspension and brakes. The Yamaha's instrument panel really impressed me and rivals that of bikes two and three times the price, easily besting the other options here. For being the cheapest option, the Honda's meter is actually pretty extensive and comes with a nice, clear display. The overall fit and finish of both the Yamaha and the Honda feel much nicer than their price tags would suggest.

Which should you buy?

The 2015 KTM RC390. KTM photo.
Honestly, it's completely up to you. If I were looking for a track toy or canyon carver, the KTM seems like a no-brainer. If the race class you want to compete in limits you to 300 cc, the Kawasaki is the best option. The Honda is best for new riders looking for something fun for the street and for whom the total money spent is paramount. The Yamaha feels like the best all-rounder, given its comfort advantages over the KTM and power advantages over the rest, but the lack of an ABS option will keep many buyers away.

Personally, it's hard for me to pick a winner, especially since I have unanswered questions about the KTM. (I'm very curious about the engine vibrations.) I was very impressed with the R3 after the launch and expected to find the CBR300R loaner in my garage a little disappointing in comparison, when I got back home. To my surprise, I'm still a big fan of the Honda. I think I would still go with the R3, but I wouldn't fault anyone for sticking with Big Red.

This is a good problem to have. For many years, this was a class of one that saw no development or innovation. Now, the manufacturers are one-upping each other almost yearly and the choices are really interesting.

For those of you who've made a purchase, why did you choose the one you did? For those of you leaning towards picking up one of these bikes, which one do you think you'll go with?

Ninja 300
Price $4,399 ($4,899 with ABS) $4,999 ($5,299 with ABS) $4,990 (ABS not available) $5,499 (ABS standard)
Engine type 286 cc liquid-cooled, four-stroke single cylinder 296 cc liquid-cooled, four-stroke parallel twin 321 cc liquid-cooled, four-stroke parallel twin 373 cc liquid-cooled, four-stroke single cylinder
Bore x stroke 76 mm x 63 mm 62 mm x 49 mm 68 mm x 44.1 mm 89 mm x 60 mm
Fuel system PGM-Fi, 38 mm throttle body DFI with dual 32 mm throttle bodies Electronic fuel injection Electronic fuel injection
Ignition electric electric electric electric
Compression 10.7:1 10.6:1 11.2:1 12.6:1
Valve train DOHC, four valves per cylinder DOHC, four valves per cylinder DOHC, four valves per cylinder DOHC, four valves per cylinder
Horsepower 30.5 horsepower @ 8,500 rpm 38.89 horsepower @ 11,000 rpm 42 horsepower @ 10,750 rpm 44 horsepower @ 9,500 rpm
Torque 20 foot-pounds @ 7,500 rpm 19.91 foot-pounds @ 10,000 rpm 21.18 foot-pounds @ 9,000 rpm 26 foot-pounds @ 7,250 rpm
Transmission six-speed six-speed with positive neutral finder constant mesh six-speed transmission six-speed, claw shifted
Front suspension 37 mm fork with 4.65 inches of travel 37 mm fork with 4.7 inches of travel 41 mm KYB fork with 5.1 inches of travel 43 mm WP USD fork with 4.9 inches of travel
Rear suspension Pro-Link single shock with preload adjustment (five positions), 4.07 inches of travel Uni-Trak shock with preload adjustment (five positions), 5.2 inches of travel KYB single shock with preload adjustment (seven positions), 4.9 inches of travel WP progressive spring rear shock with preload adjustment (10 positions), 5.9 inches of travel
Front brake Single 296 mm disc Single 290 mm petal type disc with two-piston caliper 298 mm single disc 330 mm radially mounted single disc with four-piston caliper
Rear brake Single 220 mm disc Single 220 mm petal-type disc with two-piston caliper 220 mm single disc 230 mm floating single disc with four-piston caliper
Front tire 110/70-17 radial 110/70-17 bias ply 110/70-17 bias ply 110/70-17 radial
Rear tire 140/70-17 radial 140/70-17 bias ply 140/70-17 bias ply 150/60-17 radial
Rake 25.30 degrees 27 degrees 25 degrees 25 degrees
Trail 3.9 inches 3.7 inches 3.7 inches 3.46 inches
Wheelbase 54.3 inches 55.3 inches 54.3 inches 53 inches
Seat height 30.7 inches 30.9 inches 30.7 inches 32 inches
Curb weight 357 pounds 383.7 pounds 368 pounds 340 pounds
Fuel capacity 3.4 gallons 4.5 gallons 3.7 gallons 2.6 gallons
Fuel economy 71 mpg 56 mpg 56 mpg 50 mpg
Service interval 4,000 miles 7,600 miles 3,000 miles 4,700 miles
Valve adjustment 16,000 miles 7,600 miles 26,600 miles 9,300 miles