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Test: Wunderlich BMW S 1000 RR and triple speed KTM SD8

Naked superbikes with no mercy

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Never ask about the point of strong naked bikes. Just enjoy their destructive actions when they try to tear your head off from 200 km / h. Wunderlich BMW S 1000 RR and triple speed KTM SD 8 in the PS test.

AT.At 7000 revolutions the fun has a hole. In fourth gear, the speed displayed on the multifunctional instrument of the Wunderlich-S 1000 RR increases to over 200 and all hell breaks loose again. The hullless four-cylinder pushes on like a shell, the arms get longer and longer, the head inevitably and inexorably tilts backwards. 230 km / h, 240 km / h, the helmet is now getting a lot of lift and tries to lift itself off the head. His strap cuts hard and painfully into the lower jaw, and the tense upper body muscles begin to hurt. Fifth gear – hold out! 250 km / h, 260 km / h, finally the entrance to the very fast right curve of the Contidrom appears. Stand up, brake briefly, put the fourth back on and fold into an inclined position at over 200 km / h. With the knee dragging, the rest of the body relaxes again, the anger and vehemence of the acceleration and the associated wind pressure are over for now. It’s really a great idea to steal the fairing from a superbike with over 200 hp and then shoot it around on a racetrack.

But as the saying goes: Is it too strong, are you too weak … And if we’re being completely honest, which of us is always sensitive at all times? And above all: How much fun and quality of life are lost if you just tick like that?

Wunderlich didn’t call the bare S 1000 RR project Piranha for nothing, because above the 7000 mark, the stripped BMW pulls the power out of your arms faster than a swarm of small predatory fish needs to devour one of its victims. And that brings us to the only not really coherent detail of the S 1000 RR-Naked: its performance characteristics are simply too sharp for a motorcycle that is mainly used on country roads. Casual power out of turns or sporty pressure from the lower speed limit in combination with relaxed asphalt painting in the form of black lines are not popular with the BMW. Having remained an athlete, it demands high engine speeds, which makes driving hectic again. For power cruising, she simply lacks pressure between 3000 and 7000 tours.

On the other hand, she copes with the violent fussing much better than the pilot. The Wunderlich crew donated not only a complete Ohlins chassis (racing cartridge at the front and TTX-36 at the rear) to the Piranha, but also lightweight PVM wheels in the original dimensions. Armed in this way, the BMW not only turns playfully, but lies like a board despite the lack of cladding. Feedback and steering precision are at a very high level, even your straight-line stability remains stable, as long as you are not too cramped on the superbike handlebars.

The Wunderlich BMW S 1000 RR.

The finish of the Wunderlich RR is not cramped, but rather very meticulous. The painting work alone is an absolute hammer and also emphasizes the very tidy look. At the rear, for example, there is no taillight, which is now integrated in the indicators. Conventional indicators are missing on the front, these have been replaced by narrow LED strips inside the radiator cowling. The engine spoiler, made of sheet aluminum, should, however, be revised again. It makes contact with the ground when the vehicle is tilted, which is not dangerous, but unnecessary. The lamp mask also takes some getting used to. She falls a lot "Street fighter"-moderately from what not everyone may like, but also doesn’t have to. Taste is individual and that’s a good thing.

There is no question that the boys at their triple-speed headquarters in Erlangen went to work in a very stylish manner when converting their KTM 1190 RC 8. However, they did not design their own lamp masks either, but used them on the KTM shelf to give their SD 8 a new face. Don’t think now "Panel down, lamp mask up – all good". No, the design of the SD 8 front took its toll. Many, even very many hours of work and a total of three lamp masks were necessary to get the now very harmonious arrangement. The placement of the cockpit and mask turned out to be problematic, as the original fairing and intake duct holder protrudes far beyond the front wheel and therefore had to be changed significantly. Another challenge was the accommodation of all sorts of smaller components that were previously hidden behind the plastic cover. "Mission accomplished" one can confidently say that the SD 8 is optically successful.

Free travel for free citizens, so get on the KTM and cock the cock. In contrast to the Wunderlich BMW, the Triplespeed KTM no longer has its RC 8 handlebar stubs, but an LSL tubular handlebar. This feels good at first and makes for an extremely casual and relaxed sitting position, but it also has a clear disadvantage. The pilot’s upper body is wider than with stumps and the steering impulses that he introduces into the motorcycle via his shoulders and upper arms at high speed are more violent. The SD 8, for example, tends to stir the steering at times violently, especially when accelerating strongly. On bad roads due to edges or bumps, this can quickly lead to handlebar bumps, to which the pilot is relentlessly exposed, since unfortunately the standard steering damper has been removed.

The triple speed KTM SD8.

Aside from this unpleasant feature, the SD 8 behaves piously in all other situations. Your 1190 twin generates full thrust at all times, pushes hard from idle and ensures exactly the powerful locomotion that you would expect from a naked bike on the country road. The fact that the open Akrapovic Evo4 racing exhaust thuds too hard is annoying, because without earplugs the tremendous soundscape is almost unbearable even at low speeds. In the Contidrom, the bassy performance doesn’t bother anyone. The SD 8 turns its laps loudly and is more fun with every lap it turns. The thrust, their willingness to turn, the active driver position and the snappy brakes, which are further increased by the wide handlebars and the PVM forged wheels, are completely convincing. Street surfing can be so beautiful, you don’t need Sunday bungee jumping to get a lasting kick.

Since the Triplespeed-SD 8 is also blessed with plenty of smoke, the driving pleasure with it on the racetrack is no different from that on the Wunderlich Piranha. From fourth gear it gets uncomfortably drafty and exhausting. So it is not surprising that the pilot, whether well trained or not, is sucked empty long before the tank and, exhausted, goes to the pit lane.

While Wunderlich describes his piranha version of the BMW S 1000 RR as a study, the SD 8 can be ordered from Triplespeed. It is also possible to convert an existing vehicle, the price then depending on the workload. So if you have scratches in the fairing of your RC 8 or S 1000 RR, you can wonder whether a heavy naked bike is not the right one for you.

Conclusion: Neither the BMW S 1000 RR nor the RC 8 lose their character with the fairing. Precisely because of this, bare life fits better with the KTM than with the very high-speed Bavarian.

Technical specifications

Drawing: archive

The performance diagram of the Wunderlich BMW S 1000 RR and the Triple Speed ​​KTM SD8.

Both stripped athletes deliver powerful pressure. The performance characteristics of the KTM with a big thrust in the middle speed range are conceptually better suited to undisguised life. The fierce performance of the BMW over 7000 / min overwhelmed without a wind protection.

Wunderlich BMW S 1000 RR

Useful: The carbon cover protects the exposed water pump.

drive:
Four-cylinder in-line engine, 4 valves / cylinder, 142 kW (193 hp) at 13,000 / min, 112 Nm at 9750 / min, 999 cm3, bore / stroke 80.0 / 49.7 mm, compression ratio 13.0: 1, Ignition / injection system, 48 mm throttle valves, mechanically operated multi-disc oil bath clutch, six-speed gearbox, chain, G-Kat

landing gear:
Light alloy bridge frame, steering head angle: 66.1 degrees, caster: 96 mm, wheelbase: 1432 mm. Upside-down fork, Ø fork inner tube: 46 mm, adjustable in spring base, rebound and compression. Central spring strut with deflection, adjustable in spring base, rebound and compression. Suspension travel front / rear: 120/130 mm

Wheels and brakes:
Forged alloy wheels, 3.50 x 17"/6.00 x 17", Front tires: 120/70 ZR 17, rear: 190/55 ZR 17. First tires: Continental RaceAttack Street. 320 mm double disc brake with radially screwed four-piston fixed calipers and radial brake pump at the front, 220 mm single disc with single-piston floating caliper at the rear

Measurements and weight:
Length / width / height 2080/740/1080 mm, seat / handlebar height 830/995 mm, handlebar width 740 mm, 203.5 kg fully fueled, f / r 52.5% / 47.5%

Rear wheel power in last gear: 130 kW (177 PS) at 277 km / h

Performance:
Acceleration 0-100 / 150/200 km / h 3.3 s / 5.2 s / 7.7 s,
50-100 / 100-150 km / h 4.5 s / 4.5 s
Top speed: 299 km / h *

Fuel / tank capacity: Fuel type: Super unleaded. Tank capacity 17.5 liters

Base price: not specified, since study

Triplespeed KTM SD8

"Back to Black" you could say, except that the KTM exhaust doesn’t whisper as sweetly as Amy Winehouse does on her album.

drive:
Two-cylinder 75-degree V-engine, 4 valves / cylinder, 114 kW (155 PS) at 9500 / min, 120 Nm at 8000 / min, 1150 cm3, bore / stroke 103.0 / 69.0 mm, compression ratio 12, 5: 1, ignition / injection system, 52 mm throttle valves, hydraulically operated multi-plate oil bath clutch, six-speed gearbox, chain, G-Kat

Landing gear:
Steel tubular space frame, steering head angle: 66.7 degrees, caster: 92 mm, wheelbase: 1430 mm. Upside-down fork, Ø fork inner tube: 43 mm, adjustable in spring base, rebound and compression. Central spring strut with deflection, adjustable in spring base, rebound and compression. Suspension travel front / rear: 120/130 mm

Wheels and brakes:
Forged alloy wheels, 3.50 x 17"/6.00 x 17", Front tires: 120/70 ZR 17, rear: 190/55 ZR 17. First tires: Continental RaceAttack Street. 320 mm double disc brake with radially screwed four-piston fixed calipers and radial brake pump at the front, 220 mm single disc with two-piston fixed caliper at the rear

Measurements and weight:
Length / width / height 2060/850/1080 mm, seat / handlebar height 825/1030 mm, handlebar width 750 mm, 187.5 kg fully fueled, f / r 51.7% / 48.3%

Rear wheel power in last gear: 108.5 kW (148 PS) at 264 km / h

Performance:
Acceleration 0-100 / 150/200 km / h 3.4 s / 5.7 s / 9.3 s
50-100 / 100-150 km / h 4.7 s / 4.5 s
Top speed: 280 km / h *

Fuel / tank capacity: Fuel type: Super unleaded. Tank capacity 18 liters

Base price: 26,200 euros

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