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| 864 mm |
| 1983 | 22.9 hp | 102 kg | 905 mm |
| 1984 | 22.9 hp | 102 kg | 905 mm |
| 1985 | 22.9 hp | 102 kg | 905 mm |
| 1986 | 22.9 hp | 102 kg | 905 mm |
| 1987 | 22.9 hp | 102 kg | 905 mm |
| 1988 | 22.9 hp | 102 kg | 905 mm |
| 1989 | 22.9 hp | 102 kg | 905 mm |
| 1990 | 22.9 hp | 102 kg | 905 mm |
| 1991 | 22.9 hp | 102 kg | 905 mm |
| 1992 | 22.9 hp | 102 kg | 905 mm |
| 1993 | 22.9 hp | 102 kg | 850 mm |
| 1994 | 22.9 hp | 102 kg | 850 mm |
| 1995 | 22.9 hp | 102 kg | 850 mm |
| 1996 | 22.9 hp | 102 kg | 850 mm |
| 1997 | 22.9 hp | 102 kg | 850 mm |
| 1998 | 22.9 hp | 102 kg | 850 mm |
| 1999 | 22.9 hp | 102 kg | 850 mm |
| 2000 | 22.9 hp | 102 kg | 850 mm |
| 2001 | 22.9 hp | 102 kg | 850 mm |
| 2002 | 22.9 hp | 102 kg | 850 mm |
| 2003 | 22.9 hp | 102 kg | 850 mm |