Friday, January 27, 2012

BMW R80 GS Reviews,Specs and Photos

The BMW R80s evolved from the 750 and then just kept on evolving slowly, like most primitive forms of life. The R80/7 appeared in September 1978 and was basically a bored-out R75. It had a duplex endless timing chain, contact breakers and mechanical advance/retard, wire wheels, fork gaiters, single front disc and a solid shaft.
The British police were much taken with the bike, and, largely at their instigation, a second disc went on the front. 
The front suspension was beefed up by reducing the damping rod holes from four to two. All engines were the S model with 9:1 compression ration, Kinematics gearchange went on soon after, in a half-successful attempt to get a half-decent gearchange action. Cast wheels followed and brake calipers changed from ATE to Brembo. These changes crept up osmotically on the Beemer, but in late 1979 came a major overhaul.
The seat changed to the sportier R90S style and the rear light became the current twin-bulb type. Changes also took place in the engine. The timing chain changed over to a single-row item with split link, which is worth remembering as it takes half the time to replace compared to the duplex one.
The ignition was modified to get out of the way of water and oil, and was put in its own container and remotely driven, much like a car's distributor. Fork gaiters departed and the shaft drive finally got a cam-type shock absorber. Production finished in 1980, The engine continued in the R80G/S Paris-Dakar model, until the R80 was brought back in 1983, featuring some of the C/S mods.


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