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Front fork leg mounted brake caliper, also called axially mounted. Early disc brake calipers were in front of the fork leg on top of the disc. This placed the caliper in an area of high air flow for better heat removal. Calipers on most modern motorcycles are mounted to the rear of the fork leg.
The front brake caliper is mounted on a hinge, and uses the torque created in the braking action to operate a valve in the fork, which inhibits the flow of oil during braking. This system was fitted to a number of motorcycles, most notably the Goldwing series from 1983 through 2000, the Pacific Coast , CB1100F , CB1000C , and VFR750F .
The front brake caliper was resited to the rear of the fork leg and the front master cylinder reservoir shape was changed. A hazard switch was added. Needle roller bearings were fitted to the swingarm instead of the earlier plain bushings. Tuning modifications were made to the carbs to improve low speed operation.
1976 models had the front brake caliper moved to the right fork leg, behind the fork as opposed to in front of the fork. This placed the brake caliper nearer the steering pivot center-line, requiring slightly less effort to steer. Mid-'77 the front forks had a major redesign: fork tube diameter increased from 34 to 35 mm (1.4 in) and internals ...
The Earles fork is a variety of leading link fork where the pivot point is behind the front wheel, which is the basis of the Earles' patent. [3] Patented by Englishman Ernest Earles in 1953, the design is constructed of light tubing, with conventional 'shock absorbers' mounted near the front axle.
Both the wheel and the other fork leg were capable of accepting another disc and caliper and a switch to a twin-disc front brake (like the GT750) was not an uncommon modification some owners made (although the larger master cylinder from the 750 was required). The single disc arrangement continued throughout the rest of the GT550's production.
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The main improvement over the previous models was the handling, helped by the stronger frame and improved front forks. However, many problems occurred with these new models. The oil capacity was reduced, causing the engine to run hot and the new 'conical' hub front brake required frequent adjustment to avoid fade. The new electrics proved ...
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