HPI | Horse Power Ignition
| CODE | MODEL | YEAR | OEM CODE | |
|---|
| ST4111 | YZ125 | 1990-1991 | - | |
| ST4213/ST4213L | YZ125 | 1992-1995 | - | |
| ST4138/ST4138L | YZ125 | 1996-2004 | - | |
| ST4150/ST4150L | YZ125 | 2005-2020 | - | |
| ST4150/ST4150L | YZ144 | 2005-2011 | - | |
| ST4384 | RD250LC YPVS | 1983-1984 | - | |
| ST4384 | RZ250 YPVS | 1983-1988 | - | |
| ST4384 | RZ250F YPVS | 1986 | - | |
| ST4384 | RZ250R YPVS | 1983-1985 | - | |
| ST4384 | RZ250RR YPVS | 1984 | - | |
| ST4238/ST4238L | YZ250 | 1996-1998 | - | |
| ST4239/ST4239L | YZ250 | 1999-2002 | - | |
| ST4438/ST4438L | YZ250F | 2001-2011 | - | |
| ST4384 | RD350LC YPVS | 1983-1987 | - | |
| ST4384 | RD350LCF YPVS | 1985-1988 | - | |
| ST4384 | RD350R YPVS | 1988-1995 | - | |
| ST4384 | RZ350 YPVS | 1983-1990 | - | |
| ST4384 | RZ350F YPVS | 1986 | - | |
| ST4384 | RZ350R YPVS | 1983-1985 | - | |
| ST4384 | RZ350RR YPVS | 1984 | - | |
| ST4351L | YFZ350 Banshee | 1987-1994 | 2GU-50 | |
| ST4350L | YFZ350 Banshee | 1995-2010 | 3GG-00/3GG-01/- | |
| ST4438/ST4438L | YZ400F | 1998-1999 | - | |
| ST4438/ST4438L | YZ426F | 2000-2002 | - | |
| ST4438/ST4438L | YZ450F | 2003-2005 | - | |
| ST4458/ST4458L | YZ450F | 2006-2009 | - | |
| |
| |
| |
| |
| |
| |
| |
| |
