Both the KTM 1290 Super Duke R and the Kawasaki Z H2 fight it out in the super heavy weight hyper naked class. Each motorcycle offers exceptional power and acceleration that rival even some of the best Superbikes. Let us see how they stack up.
Z H2 vs 1290 Super Duke R Dyno Curve
Monster horsepower and torque is produced by both motorcycles with the Z H2 having the outright horsepower advantage as it puts down 178 horsepower at 10500 rpm from the supercharge 998 cc inline-four engine.
The KTM while down a fair bit at 158 horsepower is not to be frowned upon as the engine really is still a Godzilla of a powerhouse.
The KTM has the advantage when it comes to peak torque almost making 100 ft/lb at the wheels with the Z H2 still hitting extremely hard with 92 ft/lb.
Both engines offer similar outright performance with the main differences being the KTM offers a more condensed and explosive delivery due it to making more torque throughout the rpm range and good choice of gearing that works to the strengths of the engine.
Also, that kick at 6000 rpm provided by the KTM is noticed on the road with a nice surge of what already is intense acceleration.
This is not to say that the Z H2 is not ‘explosive’, far from it though it is a very linear and consistent and extremely urgent build-up of power that quite literally is overwhelming to say the least!
Z H2 vs 1290 Super Duke R Thrust Curve
The above thrust curve shows acceleration in Gs for each gear plotted against speed comparing both motorcycles.
This graph takes into consideration the torque at the rear wheel, the gear ratios, and the weight of each motorcycle. Wind resistance is not calculated.
So, while a great representation of the real world thrust/acceleration produced by both motorcycles in each gear, if wind resistance was taken into consideration, it would look slightly different and in favour of the Z H2.
If aerodynamics were the same for both motorcycles the motorcycle with more peak power would show slightly more G’s increasing linearly as the speed rose.
If you look at the acceleration curve you will see that the Z H2 accelerates a little harder than the 1290 Super Duke from around 140-150 mph onward though the above thrust curve shows both motorcycle making similar thrust from those speeds onward which would suggest that if aero were the same, they would accelerate more-or less the same.
The 1290 shows similar thrust as the Z H2 from 130 mph onward simply because it is 30-40 kgs lighter but as speed increases weight becomes much less of a factor to accelerate and power becomes more important to overcome wind resistance assuming aerodynamics are the same for both.
As the above graph does not take wind resistance into consideration it shows the 1290 a little more capable at higher speed than it really is in the real world.
Regardless of what the above graph shows, for the most part what we can learn is that the KTM monsters the Z H2 in first gear and in second gear it almost matches the thrust/acceleration of the first gear of the Z H2. It is a similar story for third gear.
While the Super Duke’s first gear massively dominates the first gear of the Z H2 it is an advantage that cannot be put to any good use as there is simply too much available acceleration meaning KTM will just flip if you ask for all of it at once.
Even the Z H2’s first gear thrust while much less than the KTM 1290 Super Duke R can also not be fully capitalised upon, as if you ask for all of it the bike will also flip. It is from third gear onward for the KTM and from second gear onward for the Z H2 that we are more interested in.
The KTM provides more acceleration if comparing third and fourth gear at almost any speed, other than from below 30 mph in third gear and below 35 mph in fourth gear. This is where the KTM is ‘chuggy’ and the Z H2 will drives cleanly and is much more trackable.
In the real world from any kind of roll-on if we exclude fifth and sixth gear for both, the ZH2 will need a gear lower than the 1290 Super Duke R otherwise the 1290 Super Duke will jump ahead but will have to change up a little earlier as the Z H2 has a higher theoretical top speed in the first four gears.
In fifth and sixth gear things even up a little and both motorcycles offer very similar thrust with the KTM having a slight advantage early in the speeds using fifth and sixth with them both trading blows in the upper end of fifth.
In sixth from about 90 mph onward the ZH H2 has a slight advantage. Though in the real world and if taking wind resistance into consideration the ZH 2 would have the slight edge.
You can see the in-gear acceleration times below.
Z H2 vs 1290 Super Duke R roll-on acceleration
|MPH||Duke||Z H2||Duke||Z H2||Duke||Z H2||Duke||Z H2|
The above graph takes rear wheel torque and gear ratios into consideration and does not take wind resistance into consideration. Unlike the first thrust curve graph it does not take the motorcycles weight into consideration.
So, the graph shows only the peak potential thrust of the engine as if measured in isolation. (Torque multiplied by gears only)
You can clearly see that the Z H2 in last third of all gears excluding first gear has more top end thrust performance and this explains its acceleration advantage it has at higher speeds even if the KTM;s thrust curve is similar in the first curve when weight is considered.
Z H2 vs 1290 Super Duke R Acceleration
The numbers below demonstrate how close both motorcycles are, though with the KTM does have the slight edge for the 0-60 mph sprint managing 2.75 seconds versus the Z H2’s 2.91 seconds. Both motorcycles are severely hindered by wheelies with the largest factor coming down to rider skill.
It is only when both motorcycles are in second gear where the Z H2 starts to claw back slightly managing a 0-100 mph time of 5.32 seconds and nudging the 1290 Dukes’ 5.36 seconds. Both motorcycle with their monstrous power are still battling wheelies in second gear too if not using wheelie control.
From then on there is still extraordinarily little in it as they cross 130 mph with the gap only being a little over a tenth of a second advantage to the Z H2.
Both motorcycles cross the quarter mile a fraction over 10 seconds with under a tenth of a second splitting them, though the Z H2 has a slight terminal velocity speed advantage of 2 mph with a time of 10.13 seconds at 146 mph, closely followed by the KTM only a couple of bike lengths behind with an impressive time of 10.21 seconds at 144 mph.
The gap remains similar up to around 150 mph with the Z H2 only slightly pulling harder but in the end the Z H2 finally asserts itself from then on and ultimately starts walk the 1290 from 160 mph onward where it eventually hits a top speed of 176.8 mph against the 1290 Super Duke R’s 170 mph top speed.
In terms of outright acceleration through the gears both motorcycles are very close and pretty much trade blows all the way up to 150 mph.
In the real world from a dig the difference will primarily come down to rider weight and skill though. Once moving, if both riders are caught napping and perhaps not in the ideal gear the KTM would have the initial advantage on the roll in
most scenarios but eventually the Z H2 will chase down and pass the KTM if both were to go at it for long enough.
In reality, both motorcycles are too close to worry about one being faster or slower than the other. Bother motorcycles offer Superbike matching and beating performance.
|SS/QM||10.13 @146 mph||10.21 @144 mph|
|SS/KM||18.40 @172 mph||18.67 @166 mph|
|SS/Mile||26.07 @176 mph||26.60 @169 mph|
|Top Speed||176.8 mph||170 mph|