Matchless G80/G85 CS 500cc Scrambler

By Graham Foster

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This bike was built to contest AHRMA's Premier 500 MX class and was put together in 1995-96.

It features a stock 1967 G80CS engine and gearbox. These items are very low mileage, as the cylinder is still standard bore with no measurable wear. The stock heavy lug frame was deemed less than ideal, so a G85 type chromoly frame was substituted. This was achieved by using a '67 P11 frame and removing the excess brackets and tabs to G85 specifications.

NOS G85 front motor plates and splash guard were used, and rear engine plates were fabricated. The alternator primary case was retained for oil tightness and to allow fitment of lights if required at a later date.

Other components include Ceriani forks, VR hubs, stainless spokes, Akront rims and Magura controls. The original gas tank was chromed, a rare alloy P11 oil tank installed and a Gold Star scrambler seat was modified to fit.

The bike has seen action at Mid-Ohio and Steamboat, but has been unused for the least season or so.

Special thanks go to Donnie Warf for the fabrication of countless spacers and other machine work, to Warren Wheeler for the magneto rebuild, and to B&J Racing for support and the rest of the stuff needed to complete the project.

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