The Perse Girder front end is a cutting edge design that has a unique look with unsurpassed quality and performance. Girder Front End -2 up to +12 Made in USA in eBay Motors, Parts Accessories, Motorcycle Parts, American, Body Frame, Handle Bars, Levers, Mirrors |eBay eBay: girder front end.
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X-Wedge engines, Baker Transmission, Custom Motorcycles, Choppers, Pro Street, V-Twin, Soft-tail, Rigid, 117ci, 128ci, Unique Design, Forward Foot Controls, Handle Bars. We have found no evidence of cheap shortcuts in the Durfee Girder."-Otto & Sichling Inc. One of the earliest types of motorcycle front suspension, the girder fork consists of a. down to 5/8 inch, and a lightweight fork tapering from about 3/4 inch down to 1/2 inch.Girder Front End Designed by Englishman Ernest Earles, this triangulated fork actually caused the front end. Norton, for example, built a heavyweight fork from tubes that tapered from about 7/8 inch O.D. Many manufacturers produced forks using different size tubing for different applications. And before fitting a set of used girder forks, make sure they’re up to the job. The slender tubes used on Webb/Brampton forks are especially prone to rusting from the inside. Regularly inspect fork legs for cracks and signs of rust. Spindles are made of special steels, and only replacements designed for fork applications should be used. Bushings wear over time and may need to be replaced, especially if maintenance has been neglected. Whatever the style, all girder forks have pivot points and/or sliders that need to be kept well greased. He traded it for a 250cc BSA - but not before the Triumph had twice pitched him off! My father rode a 500cc Triumph so equipped in the early 1930s and declared it to be an evil handling bike. Though not fitting into either category, Triumph fitted some of their 1920s motorcycles with a girder fork that paired a hinged lower link and a slider at the top, meaning the fork would move backward and forward during compression, altering the steering geometry. The “modern” Harley Springer front end is essentially a development of the first leading-link design but with progressive compression and rebound springs. The British Castle fork fitted to the Brough Superior closely followed the Harley design, but added large rotary friction dampers. The leading-link fork fitted to Harley-Davidsons carried the front wheel axle ahead of the spring leg, which slid against a coil spring carried in the main fork. Vincent’s own Girdraulic fork used forged alloy blades for extra strength instead of the welded tube construction of the Brampton, and added hydraulic damping. The Brampton fork, later fitted to Vincents, was similar in concept to the Webb. Webb ever made any money from his invention is unlikely, as just about every British motorcycle manufacturer built its own fork following the basic Webb design. Advantages over the Druid included the option of a rotary friction damper and tapered coil springs for progressive compression. Most popular in terms of usage on pre-WWII British motorcycles was the Webb fork, which again used a parallelogram linkage to allow for suspension travel, usually controlled by a large central spring.
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