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| 810 mm |
| 1988 | 20 hp | 108 kg | 810 mm |
| 1989 | 20 hp | 108 kg | 810 mm |
| 1990 | 20 hp | 108 kg | 810 mm |
| 1991 | 20 hp | 108 kg | 810 mm |
| 1992 | 20 hp | 108 kg | 810 mm |
| 1993 | 20 hp | 108 kg | 810 mm |
| 1994 | 20 hp | 108 kg | 810 mm |
| 1995 | 20 hp | 108 kg | 810 mm |
| 1996 | 20 hp | 108 kg | 810 mm |
| 1997 | 20 hp | 108 kg | 810 mm |
| 1998 | 20 hp | 108 kg | 810 mm |
| 1999 | 20 hp | 108 kg | 810 mm |
| 2000 | 20 hp | 108 kg | 810 mm |
| 2001 | 810 mm | US$3,999 |
| 2002 | 810 mm | US$3,999 |
| 2003 | 810 mm | US$3,999 |
| 2004 | 108 kg | 810 mm | US$4,099 |
| 2005 | 108 kg | 810 mm | US$4,099 |
| 2006 | 108 kg | 810 mm | US$4,149 |
| 2007 | 108 kg | 810 mm | US$4,199 |