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Rear swing arm stored in plastic bushings (needle roller bearings from the end of 1980) Ground clearance 150 mm (5.9 in) Foot peg height 355 mm (14.0 in) Hydraulically damped telescopic fork at the front (35 mm (1.4 in)) with 160 mm (6.3 in) travel; 2 hydraulically damped spring struts at the rear, springs adjustable in 5 positions
Two-barrel downdraft Holley 2280 carburetor Cross-sectional schematic. A carburetor (also spelled carburettor or carburetter) [1] [2] [3] is a device used by a gasoline internal combustion engine to control and mix air and fuel entering the engine. [4]
Although the needle and jets were still offset, they were moved away from the side of the bore which simplified the needle mounting. Air for the pilot feed was taken from the outside of the carb through a drilling. The GP was available in four body sizes and in flange mounting only: [37] 15GP - 7/8, 15/16", 1" and 11/16" bore diameters
The motorcycle featured a three-cylinder two-stroke engine built right into the front wheel, transmission and clutch, with more comfortable front and rear suspension. Streamlining was important as aerodynamics was the first priority of the team who wanted all the moving parts covered, dirt and mud protection, and an elegant style.
The valve is often described as a needle valve, although this is a misnomer. A true needle valve uses a tapered needle in a tapered seat, so as to provide fine control over flow rate. The float valve uses a pointed needle against a square-edged seat, to give a positive shut-off. As the float relies on gravity, the chamber must be mounted ...
The term "choke" is applied to the carburetor's enrichment device even when it works by a totally different method. Commonly, SU carburettors have "chokes" that work by lowering the fuel jet to a narrower part of the needle. Some others work by introducing an additional fuel route to the constant depression chamber.