The New Zealand Castrol Six Hour Race was an endurance motorcycle race that was held for fifteen years at Manfeild race track in Feilding, near Palmerston North, from 1974 to 1988. Many of New Zealand's top international riders competed at the Six Hour race; winners included Dave Hiscock (5-time winner), Neil Chivas (4-time winner), Graeme Crosby (3-time winner), Aaron Slight (2-time winner), and Ginger Molloy (first winner). The race was characterised by its exclusive use of unmodified standard production motorcycles and a running start where the racers had to run to their machines before they could start. There was special provisions that the machines were no older than 3 years old, which was a boon to the motorcycle industry in New Zealand at the time which saw a dramatic rise in the sale of Motorcycles after these events.

Winners 1974: Ginger Molloy (solo) – Kawasaki Z1-A 1975: Graeme Crosby (solo) – Kawasaki Z1-B 1976: Graeme Crosby (solo) – Kawasaki Z1000 1977: Graeme Crosby and Tony Hatton – Kawasaki Z1000 1978: Dave Hiscock and Neil Chivas – Suzuki GS1000EN 1979: Dave Hiscock and Neil Chivas – Suzuki GSX1100ET 1980: Dave Hiscock and Neil Chivas – Suzuki GSX1100T (Black Pipe) 1981: Malcolm Campbell and Mick Cole – Honda CB1100R 1982: Dave Hiscock and Neville Hiscock – Suzuki GSX750SZ Katana 1983: Bill Biber and Phil Payne – Honda VF750F 1984: Alan DeLatour and Dave Martin – Honda VF1000F 1985: Dave Hiscock and Neil Chivas – Suzuki GSX-R750F 1986: Aaron Slight and Rob Doran – Yamaha FZ750 1987: Aaron Slight and Wayne Clark – Yamaha FZR1000 1988: Tony Rees and Dave Hicks – Yamaha FZR1000

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