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Driving report Kawasaki Z 2300 with V12 engine
Self-made with V12
Nothing is too difficult for the engineer: The English craftsman Allen Millyard skilfully hacked up two Kawasaki Z-1300 engines into a huge V12 bike. In all seriousness: is something like that mobile?
It should smoke. Actually. The heavy Kawa, however, does
Allen’s first attempt at burnout came to nothing. The torque of the V-engine does not manage to cause the rear tire to spin straight away. But the builder knows no mercy, turns the V12 up again properly, and this time the Michelin gets his shave while the two open pipes roar unfiltered into rural Berkshire.
The 41 year old development engineer at the UK Department of Defense loves challenges ?? he doesn’t just build his bikes for shows, but for everyday use. »All of my conversions were suitable for everyday use, and I’ll be using one of them every day for two years
Driven to work. ”Mind you, these machines all powered at least five-cylinder, two-stroke, Kawasaki-based in-line engines.
Millyard also has a big heart for V-engines. He recently fulfilled a childhood dream and pimped a Honda SS 50 into a 100 cm3 V2. What motivated him to do something bigger: An air-cooled V8 engine with 1600 cm3 was created from two Z-1000 engines. Which in turn led to the really powerful announcement. “During a show where I was exhibiting the V8, a couple of booths down the street were selling Z-1300 parts. I took one look and the salesman teased: “Should it be a V12 next ???” No, I replied, to which he said that something like this was guaranteed not to be possible. Better not have said that. ”
The concept and design of the twelve-cylinder actually required a lot more brainpower than the eight-cylinder, as the Z-1300 engine is much more complex than the Z-1000 unit. “To get the symmetry, I chose an incline of 35 degrees for the two cylinder banks
the short motor, which resulted in a cylinder angle of 70 degrees, ”explains Millyard.
“Logically I had to turn the rear cylinder head around? which at first came close to a nightmare, because nothing was arranged in the center of the in-line six-cylinder. Even the spacing of the stud bolts was different, which is why I was allowed to saw open and change all cooling and oil ducts. “
The engineer converted the entire crank drive to roller bearings and used crank webs from his two-stroke stock. Nevertheless, he soon found himself confronted with the next difficulty: It was impossible to accommodate two connecting rods on one crank pin, so he designed the transmission elements to the crankshaft as secondary and mother connecting rods based on the principle of radial engines. “Without my friend Chris Halliday, who cut my connecting rods out of high-strength chrome-molybdenum bar material on his CNC milling machine, I wouldn’t be finished today.”
A first test seat suggests that the tinkerer is also working on the chassis,
although most of it looks original, it has been heavily handcrafted. The tank was extended by around ten centimeters and
hides the new airbox. To get the V12
Allen used four 100-millimeter frame pieces and reinforcements. Thanks to a 30 Ah battery, the motor gurgles quietly at the first push of a button. From the seat, the Z 2300 looks big, but almost normal? a fallacy that the driver soon feels on his hot shins, because the rear camshafts rotate between them. The twist-
moment the monsters is tremendous; a twitch of the throttle is enough to bring the load emphatically up to travel speed. But like all Millyard’s motorcycles, the V12 is also functional and, not least thanks to the injection, hangs from the Z 1300 A3 Voyager well on the gas, even when suddenly wound up in fifth gear. The gurgling turns into a slow snort.
At 140 km / h it should be good ?? considering the many hours of work that went into the engine. According to the tachometer, this corresponds to around 4000 tours. Curves do not disturb the vehicle, despite the standard telescopic fork, on which only the springs have been further pretensioned. Extra-hard Hagon work at the rear-
Struts. Millyard’s way of not relying on the brake system of the Z 1300 with a weight of almost 400 kilograms: The discs on the front wheel were fitted with six-piston pliers and slow down the long Lulatsch sufficiently. At a slow speed, the weight, but also the excess length, can be felt significantly more than at a brisk ride. Egg dances, however, which one might assume, the V12 did not do ?? despite the rather worn out rear rubber, which, as already mentioned, the builder finally gives the rest.
Allen doesn’t think about selling. “There should be a lucrative offer, because I’ve been thinking of that thing for nine months. Now that it’s done I only want one thing: drive. ??
Technical data – Kawasaki Z 2300 V12 self-made
Millyard Z 2300
Data
Engine: water-cooled twelve-cylinder four-stroke V-engine, cylinder angle 70 degrees, four overhead camshafts driven by Hy-Vo multi-row toothed chain, two valves per cylinder, operated via rocker arms, Ven-
diameter 34.5 / 29.5 millimeters, electronic manifold injection, electric starter, three-phase alternator 390 watts, battery 12 V / 30 Ah.
Bore x stroke 62 x 63 mm
Cubic capacity 2281 cm3
Performance (estimated)
148 kW (200 PS) at 8000 rpm
Power transmission: primary drive via Hy-Vo inverted tooth chain, multi-disc oil bath clutch, claw-shift five-speed gearbox, secondary drive via cardan shaft.
Chassis: double-loop tubular steel frame with 45-millimeter main tube, extended by four 100-millimeter tubes and reinforced with gusset plates, air-assisted telescopic fork, stanchion tube diameter 41 mm, spring travel 200 mm, two-arm swing arm, Hagon struts, adjustable spring-
basis, spring travel 105 mm, double disc brake at the front, Ø 300 mm, Pretech six-piston pliers, single-disc brake at the rear, Ø 290 mm, single-piston pliers. Light alloy cast wheels, front tires 3.25 x 18, 130 /
90 x 17 rear, Michelin Macadam tires.
mass and weight
Steering head angle 62.5 degrees
Trail 98 mm
Wheelbase 1687mm
Seat height 813 mm
Tank capacity 32 liters
Oil supply 6.2 liters
Weight with a full tank approx. 380 kg
Consumption about 19 l / 100 km
Construction time around 9 months
Manufacturer: Allen Millyard
Email: kawafives@tinyworld.co.uk
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