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There are two-wheelers that are more than just a means of transport or curve surfers. Are they adult toys ?? the dream of many freaks.

Many of us, who even remotely wrest a sporty aspect from motorcycling, have probably tried to let the front or rear wheel take off in a targeted manner. Just for fun. As a kick. Out of adrenaline addiction. Or, even if it sounds banal, to impress. At this point, MOTORRAD does not want to call for experiments or even instructions
give for wheelie driving. But based on
of three naked bikes explain the requirements an established stunt professional demands of his toys. The choice: Buell XB9S, Kawasaki Z 1000 and KTM 640 Duke II. First of all, one thing should be said: According to the road traffic regulations, every road user is obliged to avoid endangering others or themselves. Bike acrobatics on public roads is absolutely illegal.
So up on a closed route. And as a guarantee to return the virgin two-wheelers undamaged to the mother importer, there’s no one more suitable as a test driver than Christian Pfeiffer, the newly crowned stunt world champion. He takes the three motorcycles for a test ride on an airfield. In general, a distinction is made between two variants of wheelie driving: balancing at the tipping point or powerwheelies due to enormous power output. For the latter, super athletes like a Suzuki GSX-R 1000 are suitable because of the sensationally low power-to-weight ratio of 1.2 kg /
PS excellent. All you have to do is open the gas in first gear. For the Buell, however, only balancing at the tipping point is an option. And other factors play a role in this. Christian’s first check is for the service delivery. It should be as homogeneous as possible over the entire speed range, start softly and ideally be transmitted to the rear wheel without load changes. The optimal stunt motor delivers the newton meter curve as a valley-free plateau with a lot of thump from the cellar.
And by the way flirts with unbridled revving. Apart from the latter, the Buell should have the best wheelie-
Be a candidate. All right then. Now applies. The runway is almost two kilometers long. Christian, give it your all!
The world champion lifts the front of the two-cylinder engine almost from a standing start,
84 hp American, shifts
at about 50 km / h into second gear and almost overturns during this action. With a speed of around 100 km / h he balances the Buell in the
Second on a bike across the square. His conclusion: Despite its extremely short wheelbase, the XB9S is extremely unsuitable for wheelie driving. The clutch is stiff, the circuit is ver-
takes tremendous emphasis, and conditionally
due to the huge flywheel mass, the motor pushes tremendously after a shift? the risk of rollover is enormous. But that’s not all.
With the XB9S, other requirements are not ideal. The more top-heavy a motorcycle with little power, the steeper the rider has to lift the front wheel to perform the dance on the rear wheel ?? something that most stunt beginners are terrified of. Ultimately, the contact area of ​​the rear tire is nothing more than the fulcrum of the balancing act. So: weight backwards. So far and much
as possible. In order to keep the balance, the front wheel does not have to climb so high as a counterweight.
Christian sits far at the Buell
front. 53 percent of the total weight
including the 74-kilogram driver weighs on the front wheel. There is also prophylactic accident insurance on the subject of driving at the tipping point: an easy-to-dose, soft and extremely effective rear wheel brake. Because once in motion, the impending rollover backwards can always be prevented by a courageous step on the footbrake. Something that only works mediocre with the Buell.
And also with the Kawasaki. The four-cylinder 1000 series generates its 127 hp via an injection. The engine does not depend on the gas as softly and with little load change as the Buell’s. In addition, the Z has a torque weakness below 6500 rpm. For Christian, who has the almost linear achievement-
folding his world champion machine, one
Ducati Monster 1000, used to be a real change. From 40 km / h he lifts the front of the Kawa, shifts quickly through the gearbox and wheelt across the plain.
The Z calls for a bold, but silky smooth clutch engagement beyond 5000 rpm. The usual technique for pulling low-performance or low-torque bikes onto the rear wheel. The Kawa ironed out its torque deficit with almost ecstatic maneuverability up to 10500 /
min off again. Particularly positive: the relaxed, upright sitting position, the good knee grip and the wide handlebars. That conveys security.
As with the KTM 640 Duke II, with only 54 HP the weakest machine of the comparison. But performance is not
everything. The 640 is briefly translated that
The gear ratio was chosen closely, the way the engine releases its horses is pleasing. Christian is thrilled? an ideal exercise bike. Mainly due to
the low weight of only 161
Kilograms, the stepless bench that allows the driver to do any acrobatics, as well as the wide handlebars, the narrow waist and last but not least: an effective rear brake. The world champion accelerates, feels his way far beyond the tipping point with the Duke, uses the brakes to keep the machine upright, balances it over the terrain at a breathtaking, physically impossible-looking angle. The exhaust touches the tar. More is just not possible. At least when it comes to rear-wheel acrobatics. Driving stoppies is a completely different world. A riskier one. Without the possibility of using the brake to prevent a rollover. The basic requirements for this are: good tire grip, a tight, torsion-resistant fork and an extremely easy-to-dose and effective brake. Also ideal for this: the upright sitting position and a wide, stable, slightly raised handlebar. This is used as a lever when it comes to raising the rear by braking.
The Buell Lightning XB9R scores top marks in this discipline. The internal disc brake with a 375 millimeter disc has no problems lifting the front-wheel-heavy projectile from the horizontal to the vertical. Another plus: the extremely short wheelbase of just 1320 millimeters and the extremely steep steering head of the XB9S at 69 degrees. It almost seems as if the American was designed for stoppies. After all, the English stunt professional Craig Jones balanced a Buell 225 meters on the front wheel ?? short-term world record.
Christian’s smile is also broad as he steps off the Buell. And doesn’t get lost on the Kawasaki either. Because the
Z also boasts a taut, torsion-resistant fork and wide handlebars, but requires more manual effort on the braking side and makes it more difficult for professionals with its three degrees flatter steering head and the more moderate, balanced seating position compared to the Buell with only 47.6 percent weight on the front wheel.
The KTM only has one brake disc at the front. In addition, the fork is
not quite as rigid. Your plus is the bench that is pulled far forward. This allows the rider to put a lot of weight on the front wheel. In theory ideal. Unfortunately the brake disc of the test motorcycle had a fine film of oil? Goodbye stop. Meanwhile, the author of these lines is constructing the ideal stunt bike in his mind: the handiness of a Suzuki SV 650 paired with the weight of a KTM Duke, the torque curve of a
Ducati-V2, the velvety soft performance of a four-cylinder displacement giant equipped with perfectly coordinated carburettors, the wheelbase of a Buell and the taut chassis-
mood of an MV Agusta. Let’s see what the world champion has to say about it. Christian smiles. Get on his monsters and turn very tight circles on a wheel. Okay, got it. It’s not the gun. It ?? s
the man behind.

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Bikes to play with

Bikes to play with
Play boy

Technical data: BUELL Lightning XB9S

BUELL Lightning XB9S engine: air-cooled two-cylinder four-stroke 45 degree V engine, intake manifold injection, Ø 45 mm, bore x stroke 88.9 x 79.4 mm, 985 cm3, 84 hp at 7400 rpm, 86 Nm at 5600 / min. Chassis: bridge frame with integrated fuel tank, upside-down fork, Ø 41 mm, internal disc brake at the front, Ø 375 mm, six-piston caliper, disc brake at the rear, Ø 240 mm, single-piston caliper. Steering head angle 69 degrees, caster 83 mm, wheelbase 1320 mm, spring travel f / h 120/127 mm, seat height * 765 mm, weight with a full tank * 205 kg, wheel load distribution with 74 kg driver f / h *: 53/47 percent, tank capacity / Reserve 14/3 liters. Price 10439 euros

Technical data: KAWASAKI Z 1000

KAWASAKI Z 1000 engine: water-cooled four-cylinder four-stroke in-line engine, intake manifold injection, Ø 38 mm, bore x stroke 77.2 x 50.9 mm, 953 cm3, 127 hp at 10000 / min, 96 Nm at 8000 / min. Chassis: backbone frame made of tubular steel, upside-down fork, Ø 41 mm, double disc brake at the front, Ø 300 mm, four-piston calipers, disc brake at the rear, Ø 220 mm, single-piston caliper. Chassis data: steering head angle 66 degrees, caster 101 mm, wheelbase 1420 mm, spring travel f / h 120/138 mm, seat height * 820 mm, weight with a full tank * 224 kg, wheel load distribution with 74 kg driver f / h *: 48/52 percent , Tank capacity / reserve 18/3 liters. Price: 9990 euros

Technical data: KTM 640 Duke II

KTM 640 Duke II engine: water-cooled single-cylinder four-stroke engine, constant pressure carburetor, Ø 40 mm, bore x stroke 101 x 78 mm, 625 cm3, 54 hp at 7300 rpm, 58 Nm at 5500 rpm. Chassis: single-loop frame made of tubular steel, upside-down fork, Ø 43 mm, front disc brake, Ø 320 mm, four-piston caliper, rear disc brake, Ø 220 mm, single-piston caliper. Chassis data: Steering head angle 64.2 degrees, caster 109 mm, wheelbase 1460 mm, spring travel f / h 140/170 mm, seat height * 910 mm, weight with a full tank * 161 kg, wheel load distribution with 74 kg driver f / h *: 47 / 53 percent, tank capacity / reserve 12 / 2.5 liters. Price: 8580 euros

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