ACE CAFE RADIO

    lundi 17 novembre 2014

    Harley Dnepr K750 – Metric Customs


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    Peanut butter and jelly. Vegemite and avocado. Pickled eggs and beer. In the culinary world there’s a few combinations that, at first glance, just shouldn’t work at all. And yet if you can manage to cross the chasm of logic and walk free in the land of adventurous eating, you’ll find that sometimes gut instincts and leaps of faith work a whole lot better than common sense. It’s the same instincts that Richard, from Berlin’s Metric Customs, used when he decided that there was no good reason why a Harley engine and a Dnepr bike couldn’t work together. Just like Reagan and Gorbachev. Genius.
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    “Metric Customs is a label just for myself,” says Richard, without a touch of irony. “It started with programmable ignition systems and some tuning parts for the Russian sidecar scene here in Germany. Also, most of the bikes I built or helped to get running have my logo on them. But not all are as special as ‘Charlotte,’ ‘Wanda,’ or this, my new project ‘Elenifae.’ As always, the name comes from family members; so far they don’t seem to mind.”
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    Rich builds all the bikes and parts, limiting the clientele to himself and his mates. Somehow we get the impression that he’s probably not short of those. But what he is short of is electricity. “I’ve only got two small garages, and believe it or not, neither of them have power. For all the big jobs, I usually have to do them after hours at work. It usually goes like this: disassemble in the garage, put it in my car, drive it to work the next day, unpack everything after work, work two days and nights, pack everything back into the car, drive back to the garage and unpack. Again and again.” Naturally, Rich hopes to find a proper workshop in Berlin in the new year. And we’re pretty sure his boss does, too.
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    So, now to ‘Elenifae.’ In January this year Rich scored an Ironhead motor in pieces. You know the story. You’re watching on eBay. Nobody’s bidding. What’s a motorcycle-riding man to do? “So I got it, rebuilt it and put it in the corner of my garage. At the same time I helped a friend to build a bike. He just so happened to have a second Dnepr K750 frame with papers he was sure he would never use. So when it came time to pay me… well, you get the drift. Without really thinking about it, I put it in my garage right to the ironhead engine. And the rest is history.”
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    “The project started on February 22nd this year with me cutting the frame apart and checking if this rather out-there idea would work. Naturally, the frame was too small, so I needed to rebuild it around the motor.” Rich carefully calculated some numbers and angles for a conservative rake, length and hight and made the frame’s new top and down tubes.
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    While it would have been a much simpler affair for Rich to dump the Rusky swing arm altogether, he decided he really liked it – just like Putin likes shirtless bear wrestles. So he got stuck in and built a new swing arm made from a confabulation of the Russian original and an Ironhead spare. “I welded it together so I could use the original swing arm hinge, which was also cut and moved backwards to get enough room.” After that, it was a just a case of getting everything square with a laser and welding the whole shebang together with a few additional tubes.
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    The next step? Rich tackled the engine mounts along with a thousand or so small holders, holes and tabs. Then the oil tank, the mountings for the footpegs, the saddle, the first draft of the fuel tank, a side stand and a rear fender were brought to life. “They were all made of sheet metal and old parts. Then I bought a new Harley springer front fork and mounted it.”
    Wanting to make the tank a focal point for the build, Rich then settled on a bold, scalloped design that would not only encompass the entire side of the tank, but also allow for a decorative brass beam to niftily span its length. Think of it as the bastard son of a metal beam and a set of knuckle dusters.
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    “The home stretch included the horn and light, which are driven by small brass buttons in the handlebars. As always, I added my electronic ignition module that I programmed and made myself. It even runs my own freeprogramming language. Yes, I am a proud geek.”
    Then it was a (not so) simple case of connecting up the brakes, wiring the, erm, wires and lamps. Last but not least, it was time for the much maligned (aka ‘bastard tough’) German TÜV approval in order to get the official road worthiness license. ‘I got it first go on the 26th of July, 2014. Finally, I was done.”
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    “The Russian frame was a nightmare. Nothing was straight.”
    “Then, in a moment of inspiration, I took the sidecar from another project just because it seemed to fit better with this project. Luckily, only a few small things needed to be changed. And that’s it! Maybe I’ve made it sound easy, but it was not at all. The Russian frame was a nightmare. Nothing was straight! In the end, most of it was replaced with the exception of the rear suspension mount, as that’s where the frame number was stamped.”
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    For those of you interested in seeing the build in a little more detail, Richard has the complete photo set from the process here. Best take a packed lunch, if you get what we mean. It’s pretty clear that the attention to detail Rich puts into his builds also makes its way into his visual documentation. We’ll call the emergency services if you’re not back in a week.
    via PIPEBURN

    Yard Built SR400 ‘Stallion’ and ‘Bronco’ by KEDO

    The German parts company’s first independent collaborations with Yamaha have resulted in two SR400 Yard Built creations that showcase some similarities but deliver two very different animals. The first, the ‘Stallion’ is dominated by sharp lines and rounded edges, hinting at its vintage genes.

    The second, the ‘Bronco’ is a street tough machine designed for everyday urban use with a blended mix of vintage style and current technology topped off with some serious flair. 




    Read more about it: http://bit.ly/1E2f6rQ

    WRC : La mutation des voitures de rallye / The mutation of rallying’s star cars…


    Des évolutions sont attendues pour les World Rally Cars apparues en 1997. Dès la saison prochaine, par exemple, le système de palette au volant va se généraliser... Que de changements depuis les monstres du Groupe B…
    En 1986, les voitures d’usine engagées au RAC Rally étaient complètement différentes de celles attendues ce week-end au Pays de Galles.
    Et pour cause : le RAC Rally 1986 a marqué la fin des Supercars du Groupe B, des prototypes de plus de 500 chevaux ultra performants et spectaculaires, mais aussi extrêmement dangereux. Après le RAC Rally 1986, le Championnat du monde des Rallyes FIA a basculé dans l’ère des Groupe A, des voitures plus proches de la série.
    Le règlement du Groupe A autorisait des moteurs 2-Litres turbo (puissance théoriquement limitée à 300 chevaux), une transmission à 4-roues motrices. Les modèles de série, qui servaient de base à l’homologation, devaient être produits à 5000 exemplaires en 12 mois consécutifs.
    Les Groupe A ont peu à peu été remplacées par les World Rally Cars à partir de 1997. Les modèles de série à 2-roues motrices (produits à 2500 unités minimum) pouvaient être modifiés en 4-roues motrices et équipés de moteurs de 2-Litres, pour peu qu’ils existaient dans la gamme du constructeur. Les systèmes de suralimentation étaient autorisés.
    Puis les nouvelles technologies ont permis aux ingénieurs de développer, entre autres, des systèmes hydrauliques complexes, entièrement gérés par l’électronique. Ainsi, différentiels et suspensions sont devenus « actifs », les changements de rapports de boîte s’effectuaient par des palettes au volant, l’accélérateur était électronique « Fly-by-Wire », les moteurs étaient équipés de post-combustion…
    Pour des raisons de coûts, ces systèmes ont été bannis par la FIA. En 2011, les World Rally Cars ont évolué vers des modèles plus compacts du segment B (exemple Ford Fiesta au lieu de Ford Focus, segment C), d’une longueur de moins de 4 mètres, produits à 2500 exemplaires en 12 mois consécutifs. La transmission intégrale est toujours autorisée, mais les moteurs sont désormais limités à une cylindrée d’1,6-Litre, injection directe, turbo (puissance environ 300 chevaux). La transmission est assurée par deux différentiels mécaniques (avant, arrière) et l’utilisation de matériaux « exotiques » comme le Titane, est interdit.
    Les changements de rapports de boîte sont désormais mécaniques, à l’exception de la voiture de Robert Kubica. Compte-tenu de son handicap, le Polonais a obtenu une dérogation pour un système de palettes au volant.
    Dès la saison prochaine, ce système va se généraliser et chaque team va utiliser un « Joker ». D’autres évolutions plus importantes sont attendues, notamment chez Volkswagen et Hyundai qui devraient engager des Polo R WRC et i20 WRC profondément modifiées.
    Le règlement technique des World Rally Cars actuel court jusqu’en 2017. La FIA et les constructeurs sont en discussion pour le devenir des voitures du WRC. On parle d’ores et déjà d’une sécurité renforcée pour les équipages.
    There are changes in store for World Rally Cars (WRC) which have evolved gradually since their introduction in 1997. From 2015, Kubica won’t be alone in using paddle gearshifts, for example. The machines have come a long way since the Group B monsters…
    In 1986, the cars which contested Britain’s world championship round were very different to those starring on this week’s Wales Rally GB.
    Indeed, that year’s ‘RAC Rally’ marked the final appearance of the so-called ‘Group B’ supercars. These purpose-built, 500-plus horsepower machines were extremely quick and exciting to watch, but a spate of accidents led to a switch to near-standard Group A cars as the sport’s flagship category from 1987.
    These new rules allowed two-litre turbocharged engines (with power output theoretically capped at 300hp) and four-wheel drive,providingsuch a car was available in road-going form in the manufacturer’s catalogue and that at least 5,000 had been produced in 12 consecutive months.
    Group A rule ended when new ‘World Rally Car’ regulations were introduced for 1997 (although Mitsubishi continued successfully with a Group A car for some time). This change enabled two-wheel drive cars (minimum production 2,500) to be converted to 4WD and run two-litre engines so long as the base engine was available under the bonnet of one the make’s models. Turbocharging was authorised.
    Lessons learned in 4x4 technology and turbocharging allowed engineers to continue sophisticating this new breed of rally car. They were also swift to identify the advantages of ‘active’ suspensions, but the concept of controlling such systems using engine power – preferably pressurised hydraulics – was quickly quashed by the FIA.
    Undeterred, Citroën struck on the idea of taking advantage of suspension-generated energy.
    Meanwhile, powered transmission control was comparatively free and three non-viscous mechanical differentials were permitted, as were paddle-lever gearshifts.
    In 2011, there was a major re-think of the World Rally Car technical rules and the emphasis switched to B-segment models (e.g. the Fiesta instead of the C-segment Focus) of less than four metres in length, with a minimum production of 2,500 over 12 consecutive months. Four-wheel drive was still allowed but engine size was brought down to 1.6 litres (still turbocharged), but power has gradually sneaked up (the title-winning VW Polo R WRC is listed as 315hp…).
    Transmission systems could now only use two non-active mechanical differentials (front and rear) and the employment of exotic materials (e.g. titanium) was prohibited to restrain costs.
    Although gear change mechanisms had to be strictly mechanical, restricted movement and power in Robert Kubica’s right arm earned him special dispensation to use powered paddle shifts in his personal car.
    From 2015, all World Rally Cars will be authorised to use such paddles and all teams have retained some technical ‘Joker’ specification-change options to carry over. As a result, much development work is under way to prepare for 2015 when Hyundai plans to homologate a new version of the i20 WRC and a significant proportion of Volkswagen’s Polo R WRC is likely to be modified.
    There may be milliseconds in it, but expect next year’s cars to be quicker...
    The target for the next wave of in-depth technical changes is 2017.

    réveil

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