
LOT 111
Seeley 500cc G50 Replica Racing Motorcycle Frame no. R.M.T MK.2 259R Engine no. MN2
Estimate: £14,000 - £18,000
Lot 111
Seeley 500cc G50 Replica Racing Motorcycle Frame no. R.M.T MK.2 259R Engine no. MN2
Seeley 500cc G50 Replica Racing Motorcycle
Frame no. R.M.T MK.2 259R
Engine no. MN2
Frame no. R.M.T MK.2 259R
Engine no. MN2
• Roger Titchmarsh frame
• Minnovation Racing engine 92x75mm bore/stroke
• TT Industries six-speed gearbox
• Maxton suspension
Many-times British sidecar champion Colin Seeley bought Associated Motor Cycles' racing department when the company went into receivership in 1966. The previous year he had constructed the first Seeley racing frame to house a Matchless G50 engine, and the AMC purchase enabled him to produce complete Seeley G50 and 7R machines. With their improved frames, the ageing four-stroke singles enjoyed renewed competitiveness, Dave Croxford winning the British 500 Championship on a Seeley G50 in 1968 and '69.
The Seeley frame progressed from the duplex cradle original to the similar but lighter Mark 2 before the down-tubes were abandoned with the Mark 3, the headstock and swinging arm pivot of which were linked solely by tubes running diagonally above the engine. Introduced in May 1971, the Mark 4 was lighter still, featuring a revised layout of thin-wall tubes, and continued in production until 1973. Production of Seeley frames was later licensed to Roger Titchmarsh and there have been countless unauthorised copies made over the years.
Surely a potential winner in the right hands, this well specified and equally well put together Seeley G50 replica has been raced by Bob Light's sponsored riders Lancelot Unissart and before him Joop de Pol of the Netherlands. Built from a Minnovation Racing kit, the machine features a Roger Titchmarsh Mark 2 frame and a Minnovation 92-bore twin-plug engine, the latter alone costing in excess of £11,000. Other specification highlights include a TT Industries six-speed gearbox; Bob Newby belt primary drive; Electrex World electronic ignition; Scitsu rev counter; Menani drum brakes (double-sided 4LS at the front); and Maxton front and rear suspension. A spare sprint tank is included in the sale together with the fairing lower half. Re-commissioning will be required before this machine returns to the track.
• Minnovation Racing engine 92x75mm bore/stroke
• TT Industries six-speed gearbox
• Maxton suspension
Many-times British sidecar champion Colin Seeley bought Associated Motor Cycles' racing department when the company went into receivership in 1966. The previous year he had constructed the first Seeley racing frame to house a Matchless G50 engine, and the AMC purchase enabled him to produce complete Seeley G50 and 7R machines. With their improved frames, the ageing four-stroke singles enjoyed renewed competitiveness, Dave Croxford winning the British 500 Championship on a Seeley G50 in 1968 and '69.
The Seeley frame progressed from the duplex cradle original to the similar but lighter Mark 2 before the down-tubes were abandoned with the Mark 3, the headstock and swinging arm pivot of which were linked solely by tubes running diagonally above the engine. Introduced in May 1971, the Mark 4 was lighter still, featuring a revised layout of thin-wall tubes, and continued in production until 1973. Production of Seeley frames was later licensed to Roger Titchmarsh and there have been countless unauthorised copies made over the years.
Surely a potential winner in the right hands, this well specified and equally well put together Seeley G50 replica has been raced by Bob Light's sponsored riders Lancelot Unissart and before him Joop de Pol of the Netherlands. Built from a Minnovation Racing kit, the machine features a Roger Titchmarsh Mark 2 frame and a Minnovation 92-bore twin-plug engine, the latter alone costing in excess of £11,000. Other specification highlights include a TT Industries six-speed gearbox; Bob Newby belt primary drive; Electrex World electronic ignition; Scitsu rev counter; Menani drum brakes (double-sided 4LS at the front); and Maxton front and rear suspension. A spare sprint tank is included in the sale together with the fairing lower half. Re-commissioning will be required before this machine returns to the track.
Saleroom notices
The engine number is MIN2. Please click the link to view the walkaround video of Lot 111: click here



























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