Suspension is the component that allows the wheels to move up and over its impeding obstacle, and it also strives to eliminate traction loss and the transfer of. Rs vintage parts eby0302 bsa m20 500cc front end girder. 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. As seen in picturesno international postagecheck out my other items. More recently, between 1998 and 2003, the italjet dragster scooter also used a singlesided swingarm suspension, though unlike the gts there was no upper control arm. It too suspends with a modern nitrogencharged ohlins monoshock, probably the best developed if not most researched suspension device made. Indian motorcycle repliucas, restorations and parts. In the 1930 advertising material the company stated there are many spring forks available, but the webb spring fork is something different something superior. We use dom seamless tubing for the front legs, and triple plate it to perfection.
Jun 30, 2009 when talking about motorcycle suspension most riders understand fork rake angle, or at least believe they do, but when the term trail is introduced, the body of knowledge seems to get a bit. Understanding motorcycle rake and trail and suspension. The durfee classic girder uses a single coiled spring at the top of the fork legs. The quiet backroads took us from ione to the wonderful villages of mokelumne hill and volcano, and lunch in plymouth. When talking about motorcycle suspension most riders understand fork rake angle, or at least believe they do, but when the term trail is introduced, the body of knowledge seems to get a bit. Sg david warren is now able to supply heavyweight webbs as fitted to cs1, es2 and model 25s. Get the best deals on girder forks when you shop the largest online selection at. Forksfork parts british only austria fahrzeughandel gmbh. Girder fork steering fit norton es2 dominator big 4 16h b815 b2201. Of note are the correctly rotary swaged fork tubes. What you have is a 1945 royal enfield wdco british army, you can verify this by looking at the drive side of the engine, under the front engine mounting hole there will be a finely pantographed british government contract number which should read cs3357, the british army census number would be c5529529 painted on the tank. The idea for the girder mountain bike fork came about as a proof of concept for a high performance girder motorcycle fork. Spindle, girder, 8 58 lower rear made from super tough stainless steel.
A girder front end is an excellent choice for a custom bike build. Girder front ends are much more than for strength and. Each set of forks comprises some 11 castings, 58 individual parts, and requires over 200 fabrication operations. Designed with you frame builders in mind uses your leftover 114 dom or chrommoly tubing. Vtwin manufacturing chrome fork leg assemblies with left side brake mount. Produced motorcycle forks used in the 1920s and 1930s. The brampton fork, later fitted to vincents, was similar in concept to the webb. We did all the hard work gathering the parts and cutting and machining the heavy plate for you. Old rigidframe enfield with girder forks britbike forum. Glide or hydraulic, springer, spring leaf or girder, with the hydraulic system being the most popular because of the overall perception that it works better. Rs vintage parts eby0302 bsa m20 500cc front end girder forks. See more ideas about custom motorcycles, motorcycle and bike design. These movements are multiplied by the length of the girder to the wheel.
Girder forks for sale in uk 24 secondhand girder forks. A motorcycle fork connects a motorcycles front wheel and axle to its frame, typically via a pair of triple clamps. I supposed if one spent thousands on a precision built girder it might not. New listing 1948 indian chief motorcycle girder fork nos. Note that the air cleaner is an old gas mask filter. Oct 21, 2012 paul hosted the girder fork ride again this year, up in the sierra nevada foothill town of ione, ca. Spindle, girder, lower rear made from super tough stainless steel. In the 1930 advertising material the company stated there are many spring forks available, but the webb spring fork is something. Jun 23, 2017 the most stable front end and the easiest front end to build. The girder fork and classic motor cycle club public group.
A brief history of girder forks classic motorcycle. A brief history of girder forks classic motorcycle repair. Buy rs vintage parts eby0302 bsa m20 500cc front end girder forks complete assembly. The springer forks pivot on the small rockers on the bottom and use a series of. Triumph fitted some of their 1920s motorcycles with a girder fork. Heavy weight webb girder forks for sale vintage norton. See more ideas about forks design, cool bikes and bike. The project was applied to a bicycle for several reasons. New listing original color girder front fork bottom link plate 155239 bsa wm20 m20.
The spitfire girder front end is made from pure american steel, right here in our shop in california usa. Girder chopper is based on a killer choppers hardtail frame, which has been modified in nearly every dimension, with a 6inch stretch, 10inch rise, and a 55degree fork rake. The girder front end is one of the earliest types of both bicycle and motorcycle front. Unfollow girder front end to stop getting updates on your ebay feed. The girder fork and classic motor cycle club has 322 members. There are offset links available for 3, and 6 degree rakes. Free shipping on many items browse your favorite brands affordable prices. This is the mechanical end of the girder, but the real trick part lies in how it absorbs the shock for the front end of the motorcycle. There is a lot of potential for too much tolerance at these points which causes the entire unit to twist and move side to side minutely. Used, pre war girder fork 1930s motobecane 100cc 2. A brief history of girder forks different forks for different folks by robert smith. Great savings free delivery collection on many items. The rear set should not move, and the front set moves up and down with the road surface.
Some people do not recognize the differenece between a set of springer forks and a set of girder forks. The spring oscillates with the pivot motion of the two legs, which share two common cross members. However as the telescopic fork became cheaper and easier to manufacture it fell by the wayside. Secondly it would be a safe test platform to develop an understanding of how to manipulate the steering geometry to get the required results. When building a custom motorcycle from the ground up one of the first important decisions you have to make is to choose a front end style, probably among 4 styles. The result is authentic heavy weight webb forks that match or exceed the original manufacturers specifications. Although girder forks are associated with early motorcycles, the british ariel ace, a modern sports motorcycle, has an alloy space frame and a matching girder fork. Compared to springers or telescopic, girder front forks are both lighter and stronger, and relatively inexpensive to build or buy. I am looking at the speed twin in the art of the motorcycle book. Mark from flanders, belgium, made available these pictures of his 1963 sportster ironhead chopper which has a hardtail frame and is equipped with a rather rare girder fork. Girder forks were once the primary fork used in the motorcycle industry.
Unfollow girder fork to stop getting updates on your ebay feed. It typically incorporates the front suspension and front brake, and allows the bike to be steered via handlebars attached to the top clamp the fork and its attachment points on the frame establish the critical geometric parameters of rake and trail, which play a major role in. Working on motorcycle forks, shocks and swingarms all day, it shouldnt be surprising he has a few of his own ideas about what comes between the wheels and frame and when he started thinking about why girder front suspensions werent often found on sport bikes, he decided to look into it. Springer vs girder forks archive classic motorcycle. British only austria fahrzeughandel gmbh a4643 pettenbach puhret 1 phone. Probably the earliest example of the parallelogram type is the druid, patented posthumously in 1917 by the estate of one arthur drew.
Springer forks, often used on older harley motorcycles, have 2 sets of legs on either side. The britten girder fork also has another key benefit it shares with all of the alternative suspension systems discussed in this paper. The side links are of different lengths,as are mine. Indian chief 1946 1947 1948 lower girder fork crown stem see more like this. It has all the positives of a ridged fork while still retaining suspension. A single sided girder fork was use on the german imme r100 motorcycle between 1949 and 1951, and the vespa scooter has a singlesided trailinglink fork. Buy girder forks and get the best deals at the lowest prices on ebay. Forks free delivery possible on eligible purchases. Glide or hydraulic, springer, spring leaf or girder, with the hydraulic system being the most popular. Vintage rudge motorcycle girder fork top link shackle.
Unfollow girder forks to stop getting updates on your ebay feed. As a result there are no high performance girder motorcycle forks except for a few custom made examples. I dont know the difference between a motorcycle girder front suspension and a springer. Motorcycle classics is americas premier magazine for collectors and enthusiasts, dreamers and restorers, newcomers and life long motorheads who love the sound and the beauty of classic bikes. I assume these can be switched to change fork angle. Webb girder fork trapezgabel bracket holder handle. The girder has several bearing points and a complex linkage. All of the components are precision cnc machined from billet steel bar stock. Fork girder main center spring clamp fits vintage norton 16h, triumph 350cc bike. Fork lengths made to suit and fork tube diameters are determined for strength necessary and aesthetics. They are very complete and even have the webb dampener knob and some friction plates and the lower anchor brackets that fix to the frame. How to prospect for a traditional, law abiding motorcycle club the motorcycle club bible book 1 john e. The weather was grand, as typical for our norcal october.
Build your own old school chopperbobber springer parts. In writing this blog about royal enfield motorcycles ive tossed in the word girder when i meant any kind of motorcycle front suspension more vintage in appearance than the telescopic fork legs on my 1999 bullet. Bobber chopper board track racer vintage british custom motorcycle harley davidson indian by vinta. This ariel girder fork is just as prone to brake dive as any telescopic fork, but is claimed to be more resistant to torsional twisting. The 8 wide kit is for narrow glide hubs and disc brakes. This is what i chose when building my hardtail sportster. The types of girder forks found on motorcycles fall broadly into two main categories. Girder front ends are much more than for strength and looks. Spindle, girder, lower front made from super tough stainless steel. Girder forks were stretched 22 inches for the profile thee darkside wanted. Every issue delivers exciting and evocative articles and photographs of the most brilliant, unusual and popular motorcycles ever made.
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