The story so far ........ Black Bob is a Triumph bitsa built up using a 1968 T120 front frame, a 1969 TRP Trophy motor, T140 rolling stock laced to 16" Harley rims
The motor has been tuned to give a bit more go, polished and ported head is fed by a Cobb Racing sidedraft Mikuni kit and exhaust exits through twin hi level straight through trophy pipes. Ignition is by Joe Hunt Magneto, there is no other wiring on the bikeso no need to keep the alternator. A Tony Hayward belt drive A PSP hydraulic clutch kit operates a lightweight alloy race spec clutch with an SRM pressure plate feeding the power to the 4 speed gearbox.
The Tr6 motor had lost compression on its last run out. A top end strip down revealed badly worn bores and a broken valve spring. A Morgo 750cc big bore kit was ordered and fitted, and the valve springs replaced with some spares from the shed.