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Yamaha Dirt Bike Spark Plug Table

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. 

 

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