Battle of the 125cc Ankle Biters, Part 1

Troy Siahaan
by Troy Siahaan

Honda Grom takes on the Kawasaki Z125, Kymco K-Pipe 125, and SSR Motorsports Razkull 125

You can thank Honda for reigniting the mini bike craze with the release of the Honda Grom back in 2014. The little 125cc runabout is a refreshing throwback to the days you could grab your board, ride out to the ocean, hit the waves, then jet around town in search of the best carne asada burrito – while maybe sneaking into a skate park for a quick blast. In short, the Grom inspires fun rides at a slower pace.

Now, with the success of the Grom, other manufacturers have kicked into action; Kawasaki was next to enter the little bike arms race with its Z125 Pro, and now we have two more entrants in the form of the Kymco K-Pipe 125 and SSR Motorsports Razkull 125. All three bikes follow the same basic theme of the Grom, with their small dimensions and low-tech, air-cooled single-cylinder engines providing minimal barriers to enter the sport of motorcycling.

Curious how small these bikes are? The KTM 390 Duke to the right dwarfs these little 125s, though at least the Kymco has 17-inch wheels like the KTM.

All four bikes have the perfect ingredients for a recipe that churns out new riders, so for this test we’ve gathered them all to see exactly which one makes the best learner bike. Since the MO staff aren’t exactly new riders (despite what some of you might think…), we’ve changed the script slightly and brought in a group of relative newbs to abuse them as only new riders can. Their experience levels range from a couple months to a couple years, and quite frankly, they have a much better idea what it’s like being a new rider than we do.

New riders don’t jump straight to trackdays, so we truncated the progression a new rider might take. First came a parking lot skills test, then a brief real-world street ride. We capped the day with our friend James Bush, organizer of the M-Gymkhana series, who laid out a very simple motorcycle gymkhana course for our riders who wanted to tackle something a little more difficult. For those unfamiliar with motorcycle gymkhana, think of it as the MSF course on steroids. A series of cones are laid out in a specific pattern, different colors indicate different directions (including 270-degree turns), and the fastest time wins. Clearly, we weren’t timing anybody this time, but the point of including the gymkhana course was to get a fuller idea of how these four machines respond in a variety of situations without risking danger on public roads. This testing also helped show that motorcycle control is a vital skill to learn no matter where you are in your riding journey.

The Honda Grom is king of the horsepower hill, not just in peak power but through most of the rev range, too. Surprisingly, the Razkull has a better curve compared to the Kawasaki until the revs climb past 6500. Meanwhile, the Kymco lags behind.

As you might have guessed from our title, there’s a second part to this story. These 125 playbikes aren’t just for new riders, as experienced veterans have taken to them to let out their inner hooligan in a much more cost-effective fashion than with big bikes. People even go so far as to race these things on go-kart tracks for 24-hours ( twice, even!) Exactly what we did with them will have to remain a secret until another time. For now, let’s break down each of the four models and discover what some of our new riders liked and disliked about each one. And if you’re looking for details on each individual model, click the appropriate links above to read our reviews of each bike on their own.

The torque chart draws the same parallels with the horsepower chart, with the Honda the clear leader and the SSR pulling on the Z125 in the lower rev range. It’s interesting the two Chinese-made bikes are allowed to pull higher revs than the Thai-built Honda and Kawasaki.

Honda Grom $3,199

We start our journey into motorcycling with the Honda Grom. The originator of this 125 minibike craze, a simple Google search will reveal just how popular these bikes really are. Honda gave the Grom a streetfighter-ish makeover in 2016 to veer slightly away from cute and more into the mean. More angular lines and, in the case of our tester, neon yellow livery help it stand apart in a crowd. The mechanicals are the same though, with its 125cc Single pumping out 8.3 hp on the MotoGP Werks dyno and 7.6 lb-ft of torque – both numbers beating out the other three contenders here.

The extra cash compared to the rest gets you the best fit and finish of the group. Apart from the the Honda’s finish, electronic fuel injection is largely the reason for having the highest price tag in the bunch, despite being built in Thailand like the Kawasaki. The tradeoff is not having to worry about managing the throttle and choke lever during cold startups (do new riders even know what a choke lever is?) The EFI is smooth as can be on the Grom, resulting in easy-to-apply power deliver right from the off – an attribute our new riders didn’t fully appreciate until they rode the carbureted SSR and Kymco (more on that later).

As part of the Grom’s design refresh, it now looks more like an anime character. Here, guest tester Arman Bedrosyan maneuvers it around our weave course.

Managing the weave section of cones around our parking lot course was made easier on the Grom by not having to second guess how it would respond during the first few degrees of throttle turn. As a result, all the riders came to grips with the Honda the fastest. One of our guest testers, Arkady Trimolov, a Kawasaki Ninja 300 rider for about a year, also noted that the Honda was the easiest to maneuver at low speeds.

Except for the Kymco and its 17-inch hoops, the other three bikes here ride on 12-inch wheels. In the Honda’s case, the front is a 120/70 and the rear a 130/70. Handling feels neutral, with Trimolov calling it “precise.” Our other rookie testers, Arman Bedrosyan and Jenny Marie Horejsi, agreed. The Grom’s prowess wasn’t as distinguishable while riding slowly through our pseudo basic rider course, but out on the street and especially during the gymkhana portion, our riders found the Grom one of the easier bikes to navigate.

All our guest testers quickly adapted to the Grom. Arkady Trimolov especially preferred it during the gymkhana portion of our day.

As part of the Grom’s redesign, the flat, broad seat of yore is now slightly stepped between rider and passenger. It wasn’t a particular issue for our average size riders, but something to keep in mind for taller riders if reduced legroom is something you want to avoid.

Overall, all our riders held the Grom in high regard. When it comes to refinement, Honda’s second to none and that attention to detail isn’t lost on the Grom. We lead off with the Grom to set a baseline. Now we move on to the other players for comparison.

2017 Honda Grom

+ Highs

  • Excellent fit and finish
  • Most power
  • Best bike overall

– Sighs

  • Highest price
  • Stepped seat could be tight for tall riders
  • Uh…

Kawasaki Z125 Pro $2,999

If any of these bikes are to truly pose a real threat to the Honda, it’s the Kawasaki Z125 Pro. At 200 bucks cheaper, the Little Green Machine is also a 125cc fuel-injected Single, made in Thailand, looks cool, and rides on 12s. So what’s the difference, really?

Not much, it turns out, except for a few key things. Horsepower is close to the Honda at 8.0, but it’s reached at 7,700 rpm compared to the Honda’s 6,400 rpm. Torque is down, too – 6.4 lb-ft vs. 7.6 lb-ft – and again the Kawi takes longer to get there. When it comes to learner bikes, though, these numbers aren’t hugely important. Power application is key here, and the Kawasaki is a bit abrupt with its on/off throttle mapping, something every tester mentioned even if they didn’t have the moto vocabulary to articulate it. As set up, the clutch friction zone engages further out in the lever’s travel than the others. Not such a problem if this is your only bike as you get used to it, but in the unique scenario our riders were in, swapping from bike to bike, Horejsi pointed out that it was slightly challenging.

Agility is the Kawasaki Z125 Pro’s biggest asset. If sportbikes are in your future, consider learning the ropes on the Green Machine.

Next, the “foot controls allow for more aggressive riding,” says Trimolov. Put another way, the Z125 has the highest and most rearset footpegs here. While not necessarily a negative unless you’re a taller rider, it’s something to keep in mind. The benefit, of course, is improved ground clearance while sport riding. Bedrosyan seemed to like the stance the Z put him in, too; the SV650 rider gravitating towards the Green bike when he wanted to go challenge himself around the gymkhana course. In normal riding conditions the high pegs didn’t seem to bother anyone.

Speaking of gymkhana, the final element of a gymkhana run is slowing the bike to a complete stop within a defined box. Here the Kawasaki rose above the rest with excellent stopping power but without abruptness that can overwhelm new riders. The Honda and Razkull kept the Kawi honest, and the Kymco lagged behind.

Like the Honda, the Z125’s around-town manners are pleasant, save for the clutch’s long travel. The on/off throttle jerkiness wasn’t quite as pronounced while riding around town, likely because the speeds were higher. Shifting drew no complaints from our testers, though the four-speed on the Honda was marginally slicker. It wasn’t a problem knowing which cog we were in, though, as the Z125’s gear-position indicator complements one of the better gauge clusters here. An analog tach and LCD dash provide all the vital info, and our new riders appreciated having a fuel gauge, too.

Snatchy on/off power delivery is one of the Z’s weaknesses, which wasn’t appreciated by our newer riders.

With its high pegs and 100/90-12 front, 120/70-12 rear tires, the Z was the most nimble package to tackle the gymkhana course with. Small and narrow tires mean quick flickability, and the flat, broad seat gives adult-size riders the ability to scoot back without feeling awkward like, potentially, with the stepped seat of the Honda.

All in all, when it comes to learner bikes, there’s little to split the Honda and Kawasaki apart. A measly $200 separates them, meaning choosing one might be just a simple matter of which one looks better to you or if you prefer a certain dealer. Where this comparison gets interesting is with the contenders coming up next.

2017 Kawasaki Z125 Pro

+ Highs

  • Fit and finish on par with Honda
  • Most agile bike here
  • Excellent brakes

– Sighs

  • Snatchy throttle
  • Lacking a little torque
  • Sportiest rearsets might put off tall riders

Kymco K-Pipe 125 $1,999

You might remember a bike called the K-Pipe 125. I was part of a team that raced one for 24 hours, and we also reviewed it here. If ever there was an oddball in this group, it’s the K-Pipe. It’s the only one here on 17-inch wheels, has a drum rear brake, and like the SSR Razkull, it’s carbureted and made in China. But what really separates the Kymco from the rest is its semi-automatic transmission and shift pattern. Unlike the others, neutral is not between first and second and is instead at the bottom of the stack, with the four gears a successive upward flick away. Also, the clutch isn’t needed at a stop. Simply twist and go. This is a great feature for a new rider trying to master the clutch, since you can’t stall the Kymco, but it won’t teach a rider how to use a fully manual transmission. So what’s the clutch for? Preserving transmission life while changing gears, as far as we can tell…

Out on the range, the Kymco’s taller dimensions required an extra moment to acclimate. Seating accommodations are spacious, with ample room to move about. Once our riders got used to simply turning the throttle to move, they really took to the simplicity of operation the semi-auto trans provided. That joy was slightly offset by the K-Pipe’s lack of power, and our group agreed they were spoiled by the extra horse the Honda and Kawi gave (hey, that’s a lot in this field!).

Compared to the other three bikes, the Kymco is the least cramped for adult-size riders. The seat offers plenty of space to move about, while bars and pegs are placed in a neutral position.

By virtue of having 17-inch wheels, the Kymco wasn’t as agile as the others, but some of our riders noted they felt more stable negotiating bends on the Kymco. Though they didn’t know it, the sacrifice made with the 17-inch wheels in terms of agility is a bit more stability while cornering. I appreciated the extra room and stability during the gymkhana portion, but I don’t foresee many folks flooding Kymco dealers specifically for that purpose.

During the street ride, Bedrosyan commented how the Kymco gave a more commanding view of the road. The bigger wheels help support that opinion, as the K-Pipe feels most like a “big bike” in that you’re simply sitting higher up than the others. But most disappointing of all were the Kymco’s brakes. Soft and spongy, the front lever could come to the bar with a strong enough pull. Braking performance was obviously reflective of the weak lever (and yes, we bled the brakes). Not to be discouraged, however, as this was likely an issue with our specific test bike – the K-Pipe I rode during the 24-hour race, albeit with a steel line and upgraded pads, had phenomenal lever pressure and feel.

With its semi-auto transmission, you can’t stall the K-Pipe 125. That should alleviate some fears from riders who struggle operating the clutch lever.

Priced at $2000, the K-Pipe feels like a motorcycle that’s $1200 cheaper than the Honda. It’s less powerful, has weaker brakes, isn’t nearly as attractive, and doesn’t look as well put together – a point emphasized by the flickering LCD gauge panel that’s hard to read even when it’s working properly. A shame, because it does have a digital tachometer, fuel gauge, and even a gear indicator.

On the flip side, it’s easy (easiest for some) to ride and is comfortable, especially for those with longer legs. If progressing further in the sport isn’t a priority (or if you already have a second motorcycle to ride) and you’re simply looking for cheap transportation, the K-Pipe is at least worth consideration.

2017 Kymco K-Pipe 125

+ Highs

  • Most spacious of the four
  • Semi-auto trans makes it supremely easy to ride
  • More commanding view of road

– Sighs

  • Least powerful
  • Could use steel-braided brake lines
  • Could use a disc brake in the rear, too

SSR Motorsports Razkull 125 $1,799

Which leads us to the least expensive motorcycle in our test, the SSR Motorsports Razkull 125 – or as we called it, the Fonster (fake Ducati Monster). Take a look at the design of its red trellis frame, headlight and fuel tank vents, and then tell us you don’t see it, too. We weren’t sure what to expect with the Razkull, as we’re still admittedly prejudiced against Chinese products. However, the closer we inspected the Razkull, the more our opinions started to change. The SSR isn’t just cobbled together; there are no errant wires or unsightly gaps. It feels, dare I say it, fairly well built.

This feeling is continued once you throw a leg over it, too. Materials feel on par with the Honda and Kawasaki – in fact, the SSR’s gauge cluster is a spittin’ image of the Grom’s – and it’s also the only bike here with a seat height lower than 30 inches – 29.5 inches, to be exact.

Despite the low seat height, rider quarters don’t feel cramped thanks to footpegs comfortably low and forward. The resulting leg bend is agreeable on the street, but ultimate ground clearance when sport riding suffers as a result. As our parking-lot day progressed, even our more confident riders started touching pegs to asphalt, something they weren’t able to do on the other bikes. The Razkull rides on 120/70-12 tires at both ends, and while it’s not the most agile, it’s not far off the Z125 and feels equally as stable leaned over even if you get to dragging pegs – an admittedly difficult thing to do for a newer rider. Also not far off in comparison to the Grom and Z125 are the brakes, with firm lever feel and strong stopping power.

If you squint hard enough, the Razkull could pass as a baby Ducati Monster. That’s a lot of style points for a bike that costs just $1800.

The Razkull relies on a single carburetor instead of EFI, and that’s one demerit point for it. The choke lever on our test unit was seemingly useless, and our bike was especially cold blooded in the morning, requiring the need to manually keep the throttle cracked upon startup to build up some heat. Despite this, the SSR makes decent power among this lot, even edging out the Kawasaki for second place in the torque department. Power delivery is smooth, too, once warm.

However, there’s no denying fuel injection is superior technology. The advantages EFI provide were made especially apparent during our street ride, where our newest rider, with less than six months experience and no time aboard a carbureted motorcycle, stalled multiple times and found it difficult to restart in the heat of the moment with impatient traffic all around.

So we’ve established the Razkull is punching harder than we expected for its weight class, but for $1800, surely there must be a reason it’s so cheap. Besides the obvious points about its Chinese origins and lack of EFI, look back to the part about being fairly well built. Little things like an exhaust heat shield rattle and a sidestand that’s too long are reminders of its price. But perhaps the underlying reason for the low price is the quality of materials. Both the Razkull and Z125 met the pavement during our parking lot drills, suffering similar damage. For the Kawi, this resulted in a bent clutch lever, whereas the Razkull’s lever snapped in half. Further, both bike’s shifters were bent. We were able to bend them back to a usable position, but the Razkull’s shifter felt much easier to bend back compared to the Kawi’s. Too many more falls and the SSR’s shifter might snap from fatigue if we had to bend it back in place again.

When we got to riding the bikes hard, sparks flew from the pegs of the Razkull long before the others.

Despite the quality of metallurgy, overall the SSR exceeded our (albeit low) expectations. But when it comes to learner bikes suitable for new riders, Trimolov brought up a good point when he asked, “Who’s SSR?” With hardly the dealer support of a Honda or Kawasaki, the new rider looking at an SSR will have to be at least a little handy with a set of tools. Then again, the Razkull is so mechanically simple, the local mom and pop shop could get you going again should it suffer a mechanical malady.

2017 SSR Razkull 125

+ Highs

  • It’s only $1800!
  • It looks fantastic
  • It’s surprisingly good for a Chinese bike

– Sighs

  • Fuel injection would be nice
  • Least cornering clearance
  • Metallurgy a little questionable

So What’ll It Be?

In some ways this exercise went down exactly like we thought it would. The Honda and Kawasaki would set the bar, while the Kymco and SSR would fall somewhere behind. Except the SSR fared far better than we expected it would. Its combination of looks, performance, and price make it a very attractive option, and the one I’d personally pick for my own money. The Kymco, meanwhile, is outclassed here. However, a case could be made for a taller rider seeking the absolute easiest pathway to two wheels.

Meanwhile, the Kawasaki is perhaps most suited to the rider looking to progress to sportbikes. It’s the most nimble with the most aggressive stance and strong brakes. Learn to master the Z and Kawasaki hopes a ZX will follow.

The OG of the minibike fad, the Honda Grom still rises above its challengers.

Still, Honda’s Grom is a remarkable little motorcycle with the quality you expect from a Honda. It makes more power and torque than the rest and it offers no negative surprises. Everything simply works like it should, which is great for someone who only cares about riding, not wrenching. At $3,200, the Grom is a big pill for the wallet to swallow in this category, but we can’t deny it’s the best of the four.

Battle of the 125cc Ankle Biters Scorecard




Z125 Pro


K-Pipe 125


Razkull 125
Total Objective Scores84.7%84.1%85.3%92.4%
Quality, Fit & Finish85.0%87.5%47.5%87.5%
Cool Factor85.0%87.5%47.5%87.5%
Grin Factor85.0%87.5%57.5%77.5%
Arkady’s Subjective Scores85.8%83.3%64.6%78.3%
Arman’s Subjective Scores84.6%86.7%59.6%77.5%
Jenny’s Subjective Scores87.5%84.2%64.2%78.3%
Troy’s Subjective Scores85.9%84.6%62.9%79.3%
Overall Score85.7%84.5%67.4%81.9%




Z125 Pro


K-Pipe 125


Razkull 125
Engine Type124.9cc, single-cylinder, air-cooled, EFI, SOHC, two-valve125cc, single-cylinder, air-cooled, EFI, SOHC, two-valve123.7cc, single-cylinder, air-cooled, carbureted, SOHC, two-valve125cc, single-cylinder, air-cooled, carbureted, SOHC, two-valve
Bore and Stroke52.4mm x 57.9mm56.0 x 50.6mm54mm x 54mm52.4mm x 55.5mm
Compression Ratio9.3:19.8:18.6:19.0 : 1
Rear Wheel Horsepower8.3 hp @ 6,400 rpm8.0 hp @ 7,700 rpm7.0 hp @ 6,900 rpm7.7 hp @ 6,600 rpm
Torque7.6 lb-ft @ 5,300 RPM6.4 lb-ft @ 5,900 rpm5.7 lb-ft @ 5,900 rpm6.9 lb-ft @ 4,800 rpm
Final DriveChainChainChainChain
Front Suspension31mm inverted fork;
3.9 inches travel
31mm telescopic fork;
3.9 inches travel
31mm telescopic fork;
3.5 inches travel
Inverted telescopic fork;
4.7 in. travel
Rear SuspensionSingle shock;
4.1 inches travel
Single shock;
4.1 inches travel
Single shock;
4.0 inches travel
Single shock;
4.0 inches travel
Front BrakeSingle 220mm disc, dual-piston caliperSingle 200mm petal-style disc, dual-piston caliperSingle 276mm disc, dual-piston caliperSingle 220mm disc, two-piston caliper.
Rear BrakeSingle 190mm disc, single piston caliperSingle 184mm petal-style disc, single piston caliperDrumSingle 190mm disc, single-piston caliper
Front Tire120/70-12100/90-122.75-17120/70-12
Rear Tire130/70-12120/70-123.50-17120/70-12
Rake/Trail25.0º/3.2 in26.0°/2.7 in27.0°/3.5 in26.0°/3.0 in
Wheelbase47.2 in46.3 in50.8 in47.7 in
Seat Height30.0 in31.7 in31.0 in29.5 in
Curb Weight231 lbs226 lbs.247 lbs.247 lbs.
Fuel Capacity1.45 gal2.0 gal1.2 gal3.17 gal
Troy Siahaan
Troy Siahaan

Troy's been riding motorcycles and writing about them since 2006, getting his start at Rider Magazine. From there, he moved to Sport Rider Magazine before finally landing at in 2011. A lifelong gearhead who didn't fully immerse himself in motorcycles until his teenage years, Troy's interests have always been in technology, performance, and going fast. Naturally, racing was the perfect avenue to combine all three. Troy has been racing nearly as long as he's been riding and has competed at the AMA national level. He's also won multiple club races throughout the country, culminating in a Utah Sport Bike Association championship in 2011. He has been invited as a guest instructor for the Yamaha Champions Riding School, and when he's not out riding, he's either wrenching on bikes or watching MotoGP.

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2 of 22 comments
  • Vrooom Vrooom on Nov 14, 2016

    I was surprised to see the Krack Pipe do so poorly, but given the test was for newby riders, and it did so poorly on the HP/Torque scale and the Transmission being weird, it shouldn't be so surprising. Bring on the hooligan portion of part 2!

  • Smallwheels Smallwheels on Feb 23, 2018

    Hey why were my previous comments deleted? I own a Razkull and had posted twice about the good MPG, and how I prefer small bikes because 45 mph is the maximum speed I find enjoyable to ride in town.

    As an update at 1550 miles it died. The mechanic said that a wire in the on off switch area was made too short and it just broke because the very cold weather shortened it. That's what he said. ALSO I got a valve adjustment and oil change. The oil was milky white and had ice chunks in it because the cold air is condensing in the air cleaner and getting into the engine. WHAT? The dealer is trying to blame me for riding in the snow and getting snow into the intake on the tank. BUT WAIT. Those little air intakes on the tank are cosmetic. They don't intake air. Snow can't fall on the tank and get into the intake system. The air intake is under the tank and blowing snow or even rain can't get in.

    So now I've got a potentially damaged motor because water was in the oil for a couple of hundred miles. My manual doesn't say to not ride in below freezing or sub zero weather. I do that with studded knobby tires. What do you think SSR Motorsports should do for me people? Let me know here before this entry gets deleted. I love my Razkull but if it's going to condense water into the air intake and get into the motor then it isn't worth owning something that will have a ruined motor full of water and ice. The bike is kept indoors at night and is only outside when I go to work or the store.