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The Airheads added some flair to the Black Bear Americana Music Festival

Some of you may recall my story about this festival from 2019. I discovered the festival in the process of seeking alternatives to the usual overcrowded and—in the case of Newport Folk—the elitist and over-regulated environments. In 2019, I attended the festival by borrowing my friend’s Toy Hauler and squeezing my R69S Stieb sidecar rig into it. We enjoyed the morning rides on the wine trail roads of Connecticut and visits to local farms and distilleries for tours and home made chocolates.

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Another successful SuperTech amid the historic vehicles of Boyertown, PA

This year’s SuperTech in Pennsylvania began with the cruelest of circumstances. The weather on Friday and Saturday was expected to be absolutely balmy for this time of year on the east coast, sunny with highs in the low sixties. Prime riding weather. But Sunday’s forecast for below-freezing temps and snow crushed most hopes of riding (though a […]

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site hosting upgraded

Because the site was performing poorly we’ve upgraded the hosting plan to provide the website with more computing resources. While this change was made last night in the wee small hours the change appears to have improved peformance. Should you continue to see poor performance, or have any other issues with the website, please submit […]

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caching disabled

While caching seems like a good way to speed up the site it also wreaks havoc when trying to make content and system updates. To eliminate the headaches we’ve made a decision to disable the website caching system. Please submit a Support Ticket if you notice underperforming parts of the site. Thank you for your […]

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Changing the range of a torque wrench.  Angular use. Adjustment correction when using torque-wrench extensions.

This article explains how to use an ‘extension’ for the purpose of convenience (perhaps a hex or 12 point socket or an allen wrench or other tool won’t fit at the end of a torque wrench where you need it); or, perhaps you want to increase the range of a torque wrench.

This article explains how to use an extension for such as the Airheads U-joint flange bolts, where you simply cannot get a torque wrench without an extension to fit properly, due to the limited room between the bolt and the U-joint body.

Another usage might be that if you only have a 75 ftlb maximum indication torque wrench and need to tighten the wheel bolts on your Paralever bike to 105 ftlbs,  ….you can do it with an extension, and this article explains it.

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Explaining the Slashes

Can someone please explain the difference between a /2, /5, /6, /7 (is there a /8?), and what exactly is an “oil-head” and a “k” bike? And what are these Earle forks that everyone speaks so reverently about?

OK, this is off the top of my head, so it may contain some errors.

2 = second version of some of the Earles fork bikes. The designation is often used incorrectly for all Earles fork twins. Not all were designated /2. Updated normal 500cc bikes beginning ca. 1960 were designated /2. The Earles fork is a swinging arm design, superior for sidecar rigs and off road applications, very plush riding, but a little heavy steering as a solo setup. They do not nosedive under braking, in fact they tend to rise in the front as the bike comes to a stop under heavy braking. These machines have very stout frames with sidecar bosses built in. The fork has adjustable geometry to accomodate the sidehack. The bikes were produced from 1955 – 1969. They came in normal and high performance versions of the horizontally opposed twin displacing either 500 or 600 cc. R50 and R60 designated normal performance. R50S, R69 and R69S are high performance models, the R69S making 42 HP and exceeding 110 mph. Despite the nomenclature, R69 models still displaced 600 cc, go figure…. 1969 models were shipped with either the Earles or a telescopic fork the same fork as the /5 series built from 1970-73. They were designated “US”. So an R69 US was a high perfomance 600 cc with a telescopic fork. There is also a 250 cc bike, this was a vertical single cylinder engine, uncommon in the US due to its lack of performance.

The remainder of this article is only available for Airheads Beemer Club members. Please login or purchase a membership here to join the Airheads Beemer Club, after which you will enjoy access this article and all members only content of the ABC web site.

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