7 Фев 2015 | Author: | Комментарии к записи HISTORY OF THE FRONT END – PART II — BIKE ME! отключены
Bimota Tesi 1D



In 1918, Carl designed a revolutionary motorcycle.

He it the Ner-a-Car. Get it? Ha. It had a 221cc two … It had an infinitely variable friction transmission. It had a monocoque chassis. And it had steering.

Between 1921 and he sold about ten thousand of in the USA and six and a half thousand of them in

The 1921 Ner-a-Car. Revolutionary

It was for its stability. The little two-… sat low, with the cylinder popping up between the rider’s The fuel tank was under the All the weight in the chassis was low.

was no rear suspension until the model, but a sprung swinging arm the front wheel, and the steering was inside the front hub, by a linkage connected to the handlebars. are still fifty or so in existence, and of them are in Australia.

Ner-a-Car showing under-seat tank and low motor placement

Neracher was probably the first man to outside the square and get away the traditional fork. The swinging arm had of attractions as a front suspension Its movement was easy to control, the was kept low, the suspension was not transferred to the frame via a small head, there was no static interfering with the suspension and if the swinging arm was angled down there was a natural anti-dive into the geometry. (This was not real relevant on the Ner-a-Car, had no front brake, but a two-part brake: one half controlled by a bar lever and the other half by a foot pedal.)

Inside a hub-centre front end

This of the braking, steering and suspension led others to build hub-centre suspensions, but not for some years.

In the late 1960s a British called Jack diFazio experimenting with hub-centre His creations tended to have a diameter hub which didn’t but did steer, and which was connected to the via a kingpin. A larger hub was mounted to the of this steering hub and spun on or roller bearings, and the wheel was to this larger hub.

The hub is steered via an A-frame on each of the wheel which is connected at the top of the and to which the steering linkages The brake calipers are attached to A-frame. The axle is held by a facing swingarm and the suspension is to this swingarm, separating from steering.

A Suzuki with a diFazio front end

diFazio’s custom front became very popular in and Europe. They weren’t but they were clever and worked. The main disadvantages a reduced steering lock and failures of the heavily loaded but many customers thought the in roadholding and stability outweighed

And while it didn’t look it looked trick.

Race were noting the advantages of the of braking, steering and suspension as In the eighties Elf created a succession of GP bikes with centre-hub and Mead and Tomkinson used a diFazio-like front end on their racer Nessie. The Elf machine competing in 1985, and in 1987 Ron rode it to 4th place in the World

The 1988 Elf Honda 500 GP racer

The manufacturer to decide to incorporate steering into a production after the Ner-a-Car was Bimota. In they released the Tesi 1D, a steered machine with a 851 motor. It never became because it’s a Bimota, and too expensive to become popular.

Then, in 1993, Yamaha the GTS-1000.

It was, for the time, a tour de force. It had electronic injection, ABS brakes front and a three-way catalytic converter and a version of the FZR sportster’s 1002cc watercooled engine. And it had what called RADD front

RADD stood for Rationally Design.

The Bimota Tesi 1D: production hub-centre steerer the Ner-a-Car

An upright beam was to a single sided swingarm at the and a wishbone at the top. The bike was by rotating the beam with a steering linkage connected to the The front wheel hub was offset, and was a single large inboard disk with a six-piston

Buyers stayed away in and Yamaha stopped making in 1996.

By all accounts the GTS-1000 a treat and went like but the trick technology translated a price tag that not many to pay. Kawasaki’s ZX-11 was cheaper.

Personally, I’ve thought the GTS1000 was … on a I’m not alone. Last year, magazine called the 1994 GTS1000 the coolest of rare “Scarce, stylish, yet capable and usable: that’s cool in our

The 1993 Yamaha GTS1000: stylish, yet capable and completely that’s cool in our book.”

As at the of writing, there are only hub-centre steerers on the market. And all Italian.

Bimota still one – the Tesi 3D. The other two are the Vyrus 2D and 4D.

looked at girder forks in I of this series. We’re to look at other types of suspension in future articles. The thing about hub-centre is that every motorcycle we in writing this article had a for being a sweet handler.

The Vyrus 2D. Don’t ask. You afford it

There were of girder-forked bikes that had a for handling like pigs the years. And we can all name a dozen bikes that handled pigs.

But every hub-centre from the Ner-a-Car forward had a for steering nicely.


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