Tuesday, 11 November 2014

HONDA CB750

Playing Hookie: Nico Mueller’s killer CB750

A dark, low-slung Honda CB750 customized by Hookie Co of Germany.
It takes more than a run-of-the-mill Honda CB750 to get our attention these days, but this low-slung speziall from Germany is very special indeed. The stance is spot on, the lines flow with purpose, and the finish is stark and beautiful.
It’s the sixth build from Dresden-based Hookie Co., the workshop run by 26-year-old designer Nico Mueller. Nico is not the most prolific of builders—he averages one bike a year—but he’d rather do it right than do it fast.
A dark, low-slung Honda CB750 customized by Hookie Co of Germany.
He didn’t hang around when he saw this CB750 donor bike, though. It’s the sturdy DOHC KZ model that pushes out a solid 77 hp—largely thanks to a rack of Keihin carbs, one feeding each cylinder.
“The CB was in great condition, so we didn’t hesitate for a minute,” Nico says. Then ideas started to form. “We envisioned it being long, flat and aggressive. We took the classic creative approach, and started to draw moodboards.”
A dark, low-slung Honda CB750 customized by Hookie Co of Germany.
After several mockups to get the proportions of Hookie #6 just right, Nico and crew took the CB750 apart. They detabbed and cleaned up the frame, positioning the mockups and taking measurements. The frame was treated to a coat of gloss black paint—along with the motor, the wheels and smaller pieces of hardware.
Other parts were brushed, cleaned and reworked rather than painted. “To avoid losing the character of the bike, we mostly use original parts,” says Nico. “Only the handlebars, the light brackets and shock absorbers are completely new.”
A dark, low-slung Honda CB750 customized by Hookie Co of Germany.
The forks have been overhauled and lowered by seven centimeters. The exhaust headers look stock, but are tucked closer to the engine; they now terminate as a 4-into-1 unit fitted with a Harley-Davidson muffler. The tires are beefy Firestone Champion Deluxes, 4.00-19 at the front and 4.50-18 at the back.
The KZ model tank, which often looks so awkward with the droop at the rear, now looks just perfect—helped by the polished steel finish and the diagonal paint stripe.
A dark, low-slung Honda CB750 customized by Hookie Co of Germany.
The seat cowl is hand-made from two-millimeter steel, and it required three attempts before Nico was happy with the result. “Without having an English wheel to help form the curves, it took a lot of time and sweat.”
Flushed into the back is an unobtrusive LED stripe acting as a stoplight. Even less obvious is the full array of Motogadget kit—including an m-Unit V.2 to replace the fuse box, m-Switch pushbutton controls, and m-Blaze bar end turn signals. There’s an RFID ignition lock too.
A dark, low-slung Honda CB750 customized by Hookie Co of Germany.
Co-conspirator Johann Ruttloff made the seat using brown leather and black 14oz denim, giving it three layers of waxing for weather resistance. At the back of the seat is a little box to store a phone or mini-tools.
The headlight cap is also crafted from leather and denim, and inspired by vintage Zündapps and military BMWs.
A dark, low-slung Honda CB750 customized by Hookie Co of Germany.
It’s a textbook example of a modern-day Honda CB750 custom. And, funnily enough, there soon will be a book that documents the build.
Keep an eye out for it in the Hookie Co. webshop from next month.

Thursday, 6 November 2014

yamaha R25 powerplant



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Yamaha R25 studio front shot
The Yamaha R25 has been one of those bikes that has generated lot of interest from the word go itself, when the R25 concept was showcased for the first time at the 2013 Tokyo Motor Show. It was the same scenario at the 2014 Auto Expo as the Yamaha stall was swarmed by Indian two-wheeler enthusiasts and now finally the production spec version has been unveiled in Indonesia.  Yamaha hasn’t confirmed about its plan of launching the new 250cc bike in our market but ZigWheels has learnt that a pre-production model of the Yamaha YZF-R25 has already landed on our shores for testing and R & D purpose. So let’s take close a look at the Yamaha YZF-R25 and what it has on offer.
Let’s start with styling, one of the main reasons for the inquisitiveness about the R25 was its M1 inspired styling, the concept bike possessed. The Indian biker has a soft spot for a full-faired motorcycle and the R25 wouldn’t disappoint them on this front. The bike sports a neatly sculpted windscreen below which sits the twin lamp headlight. The lamps are divided by a small duct that gives the front an aggressive look. The fuel tank carries forward the edgy design language with subtle knee recess.
Yamaha R25 headlight shot
In profile, the bike looks bulkier than what it is in reality and can be easily passed off as a 600cc, supersport offering. The tail section is very minimalistic and sharp with the LED taillight being neatly integrated into it The Yamaha R25 gets equipped with a part-analogue-part-digital instrument console; it sports an analogue tachometer and a LCD screen that houses the speedometer, odometer, fuel gauge and other details. The instrument cluster also features a revv limiter light. The R25 employs a two-into-one exhaust system with a R6 inspired stubby muffler and Y-spoke wheels.  Overall design of the Yamaha R25 is pleasing and though the lines aren’t as sharp as the concept bike, it holds its own amongst the company of its quarter-litre rivals.
Yamaha R25 side shot
One of the highlights of the Yamaha R25 is its powerplant. The 249cc, parallel-twin, 8-valve, liquid-cooled motor pumps out 36PS at a heady 12,000rpm and torque rating stands at 22.5Nm at 10,000rpm. Power is transmitted to the rear-wheel via a six-speed gearbox. According to Yamaha, they have worked on the combustion chamber design to obtain better mixture of air and fuel thereby resulting in better combustion. The cylinder of the Yamaha R25 like all Yamaha twin-cylinder offerings has been built from DiASil (Die casting Aluminum-Silicon) construction, which apart from reducing the weight of the cylinder also improves heat dissipation.

Tuesday, 4 November 2014

yamaha R25 lounce to defeat R15


yamaha_r25
R25

Pembaca sekalian, perangkat pengereman begitu penting untuk diprioritaskan kualitasnya. Beberapa ATPM begitu mengetahui tentang hal ini, so tidak melulu memaksakan produk buatan mereka sendiri, namun sering kali kita temukan atpm motor bekerjasama dengan perusahaan yang fokus pada pembuatan produk perangkat pengereman.
Sebut saja NISSIN, pabrikan yang fokus menelurkan produk dengan spesialis perangkat pengereman ini tak diragukan kualitas produknya. Tak heran banyak atpm motor yang mengadopsi double disc brake misalnya menggunakan produk nissin entah semua atau sebagian.
RDB Nissin yamaha
R25
Contohnya saja All New CBR 250R dan Suzuki Inazuma 250, kedua motor ini menggunakan perangkat pengereman dari Nissin di kedua rem cakramnya baik depan maupun belakang. Contoh lain adalah Vixion, di generasi pertama vixion menggunakan cakram belakang buatan yamaha sendiri di kaliper cakram depan, sejak berubah ke New Vixion dengan double cakram, Yamaha mempercayakan Nissin sebagai pemasok perangkat pengereman bagian belakang, berikut juga NJMX dan R15 yang juga menggunakan Nissin.
R25-RDB NO NISSIN
R25
RDB Yamaha R25
Namun rupanya tidak begitu halnya dengan Yamaha R25, untuk pertama kalinya produk yamaha dengan fitur double cakram belakang tak lagi mendapatkan support Nissin loh. Jika yamaha sudah terbiasa dengan produk cakram depan miliknya sendiri (tanpa merk di body kalipernya) maka cakram belakang Yamaha R25 pun juga tidak menggunakan produk Nissin melainkan juga tanpa merk yang disinyalir Yamaha memang melakukan pengembangan pembuatan cakram belakang sendiri dengan tujuan untuk semakin menekan cost produksi sehingga secara umum harga produk pun tak menjadi lebih mahal. (fnc)