The table includes factory spark plug specs for all of the vintage Enduros the site is focused on. We have also included a number of more modern Yamaha Dirt bikes on the assumption some of you may need this information in a convenient place. Please note these are stock plugs. Your tuning may require and adjustment hotter or colder heat range setting. See information at the bottom of the page for heat range adjustment information.
Yamaha Vintage Dirt Bike Spark Plug Specifications |
|
MODEL |
Spark Plug |
| AT1/1M (ALL) | B8ES |
| AT2/2M (ALL) | B8ES |
| AT3/3MX (1973) | B9ES |
| CT175 (69-73) | B8ES |
| CT175 (69-73) | B8ES |
| DT1/1B/1C (68-70) | B8ES |
| DT100 (1977) | B8ES |
| DT100 (74-75) | B8HS |
| DT100 (78-83) | B7ES |
| DT125 (1976) | B8ES |
| DT125 (1978) | B8ES |
| DT125 (74-75) | B8ES |
| DT125 (79-81) | B8ES |
| DT175 (1976) | B8ES |
| DT175 (74-75) | B8ES |
| DT175 (78-79) | B8ES |
| DT175 (80-81) | B9ES |
| DT1E (1971) | B8ES |
| DT1E/MX (1971) | B8ES |
| DT2 (1972) | B8ES |
| DT3 (1973) | B8ES |
| DT360 (1974) | B8ES |
| DT400 (1977) | B8ES |
| DT400 (1978) | B8ES |
| DT400 (75-76) | B8ES |
| DT80 (81-83) | B7HS |
| GT80/MX (73-80) | B7HS |
| GT80/MX (73-80) | B7HS |
| IT125 (80-81) | B9EG |
| IT175 (1982) | B8EG |
| IT175 (1983) | B8EG |
| IT175 (77-79) | B9EG |
| IT175 (80-81) | B9EG |
| IT200 (84-86) | B8EG |
| IT250 (1980) | B9EG |
| IT250 (1983) | B9EG |
| IT250 (81-82) | B9EG |
| IT425 (1980) | B8EG |
| IT465 (81-82) | B8ES |
| IT490 (83-84) | B8ES |
| JT1/1L (1971) | B7HS |
| JT2/2MX (1972) | B7HS |
| MX100 (74-75) | B7ES |
| MX100 (79-83) | B7ES |
| MX175 (74-81) | B8ES |
| MX250 (73-75) | B8EG |
| MX360 (73-74) | B9EG |
| MX80 (80-82) | B7HS |
| PW50 (81-87,90-08) (Y-Zinger) | BP4HS |
| RD125 (1975) | B8HS |
| RD125 (1976) | B8ES |
| RD200 (1976) | B8ES |
| RD200 (74-75) | B8HS |
| RD250 (73-75) | B8HS |
| RD350 (73-75) | B8HS |
| RD400 (1979) | B8ES |
| RD400 (76-78) | B8ES |
| RD60 (73-75) | B7ES |
| RS100 (75-76) | B8HS |
| RT1 (70-71) | B8ES |
| RT1 (70-71) | B8ES |
| RT100 (90,92-96) | B7ES |
| RT100 (97-00) | BR7ES |
| RT180 (90-93) | B8ES |
| RT180 (95-98) | B8ES |
| RT1MX (70-71) | B9EG |
| RT2 (1972) | B8ES |
| RT2 (1972) | B8ES |
| RT3 (1973) | B8ES |
| TT250 (1980) | BP7ES |
| TT250 (81-82) | BP7ES |
| TT350 (86-87) | D8EA |
| TT500 (1976) | BP7ES |
| TT500 (77-81) | BP7ES |
| TT600 (83-84) | D7EA |
| TT600 (85-86) | DP7EA-9 |
| TY175 (1975) | B9ES |
| TY175 (76-79) | B7ES |
| TY250 (74-78) | B7ES |
| TY350 (1985) | BP6EV |
| TY350 (1986) | BP6EV |
| TY80 (74-75) | B6HS |
| XT200 (82-83) | D8EA |
| XT225 (01-Current) | DR8EA |
| XT225 (92-00) (Serow) | DR8EA |
| XT250 (1984) | D8EA |
| XT250 (2008) | DR8EA |
| XT250 (80-83) | BP7ES |
| XT350 (85-00) | D8EA |
| XT500 (76-79) | BP7ES |
| XT500 (80-81) | BP6ES |
| XT550 (82-83) | D7EA |
| XT550 (82-83) | D7EA |
| XT600 (84-89) | DP8EA-9 |
| XT600E (90-95) | DPR8EA-9 |
| YZ100 (76-77) | B10EG |
| YZ100 (78-79) | B10EG |
| YZ100 (80-81) | B10EG |
| YZ100 (82-83) | B9EG |
| YZ125 (02-04) | BR9EG |
| YZ125 (07-Current) | BR9EG |
| YZ125 (1980) | B10EG |
| YZ125 (1981) | B10EG |
| YZ125 (1982) | B9EG |
| YZ125 (1983) | BR9EG |
| YZ125 (1984) | B9EG |
| YZ125 (1985) | B9EG |
| YZ125 (1988) | B9EG |
| YZ125 (1989) | B9EG |
| YZ125 (1992) | BR9EG |
| YZ125 (1993) | BR9EG |
| YZ125 (1996) | B9EG |
| YZ125 (1997) | B9EG |
| YZ125 (2005) | BR9EG |
| YZ125 (2006) | BR9EG |
| YZ125 (77-79) | B10EG |
| YZ125 (86-87) | B9EG |
| YZ125 (90-91) | B9EG |
| YZ125 (94-95) | B9EG |
| YZ125 (98-01) | BR9EG |
| YZ175 (1976) | B10EG |
| YZ250 (1974) | B9EG |
| YZ250 (1975) | B9EG |
| YZ250 (1976) | B9EG |
| YZ250 (1977) | B9EG |
| YZ250 (1980) | B9EG |
| YZ250 (1981) | B9EG |
| YZ250 (1982) | B8EG |
| YZ250 (1983) | BR8EG |
| YZ250 (1984) | B9EG |
| YZ250 (1985) | B9EG |
| YZ250 (1986) | B8EG |
| YZ250 (1989) | B8EG |
| YZ250 (1998) | BR8EG |
| YZ250 (78-79) | B9EG |
| YZ250 (87-88) | B8EG |
| YZ250 (90-93) | B8EG |
| YZ250 (94-95) | B8EG |
| YZ250 (96-97) | BR8EG |
| YZ250 (99-Current) | BR8EG |
| YZ250F (All) | CR8E |
| YZ250WR (1989) | B8EG |
| YZ250WR (1990) | B8EG |
| YZ400 (1979) | B8EG |
| YZ400 (77-78) | B8EG |
| YZ400F (98-99) | CR8E |
| YZ426F (00-02) | CR8E |
| YZ450F (03-06) | CR8E |
| YZ450F (06-07) | CR8E |
| YZ450F (2005) | CR8E |
| YZ450F (2008-Current) | CR8E |
| YZ450FSP (2006) (50th Anniv.) | CR8E |
| YZ465 (1980) | B8ES |
| YZ465 (1981) | B8ES |
| YZ490 (1982) | B8ES |
| YZ490 (83-85) | B8EG |
| YZ490 (86-90) | B8EG |
| YZ50 (1980) | B9ES |
| YZ60 (1981) | B9ES |
| YZ60 (82-83) | B9ES |
| YZ80 (00-01) | BR10EG |
| YZ80 (1974) | B7HS |
| YZ80 (1975) | B8HS |
| YZ80 (1976) | B8ES |
| YZ80 (1977) | B8ES |
| YZ80 (1978) | B8ES |
| YZ80 (1979) | B8ES |
| YZ80 (1980) | B8ES |
| YZ80 (1981) | B8ES |
| YZ80 (1982) | B9ES |
| YZ80 (1983) | BR9ES |
| YZ80 (84-85) | B9EG |
| YZ80 (86-92) | B9EG |
| YZ80 (93-99) | B10EG |
| YZ85 (02-Current) | BR10EG |
NGK Spark Plugs Heat Rating
The spark plug heat range has no relationship to the electrical energy transferred through the spark plug. The heat range of a spark plug is the range in which the plug works well thermally.
The heat rating of each NGK spark plug is indicated by a number; lower numbers indicate a hotter type, higher numbers indicate a colder type.
