Question about 1990 Honda ST 1100 Pan European

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Hot and cold plug difference

What is the difference between hot and cold plug?

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Hot Plug - has a longer insulator nose length - less heat is absorbed by the plug and transferred to the cooling system - the plug runs at a higher temperature - the plug is more prone to pre-ignition (if greater than 850 degrees C) - NGK BP5ES is hotter than a BP7ES plug. - An overheated plug will be white with brown spots. Cold Plug - has a shorter insulator nose length - more heat is absorbed by the plug and transferred to the cooling system - the plug runs at a lower temperature - the plug is more prone to fouling (if less than 500 degrees C) - NGK BP7ES is cooler than a BP5ES plug. - A fouled plug will be black and sooty.

Posted on Nov 10, 2008

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Hot and cold plug difference


Hot Plug - has a longer insulator nose length - less heat is absorbed by the plug and transferred to the cooling system - the plug runs at a higher temperature - the plug is more prone to pre-ignition (if greater than 850 degrees C) - NGK BP5ES is hotter than a BP7ES plug. - An overheated plug will be white with brown spots. Cold Plug - has a shorter insulator nose length - more heat is absorbed by the plug and transferred to the cooling system - the plug runs at a lower temperature - the plug is more prone to fouling (if less than 500 degrees C) - NGK BP7ES is cooler than a BP5ES plug. - A fouled plug will be black and sooty.

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Hot and cold plug difference


Hot Plug - has a longer insulator nose length - less heat is absorbed by the plug and transferred to the cooling system - the plug runs at a higher temperature - the plug is more prone to pre-ignition (if greater than 850 degrees C) - NGK BP5ES is hotter than a BP7ES plug. - An overheated plug will be white with brown spots. Cold Plug - has a shorter insulator nose length - more heat is absorbed by the plug and transferred to the cooling system - the plug runs at a lower temperature - the plug is more prone to fouling (if less than 500 degrees C) - NGK BP7ES is cooler than a BP5ES plug. - A fouled plug will be black and sooty.

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1 Answer

Hot and cold plug difference


Hot Plug - has a longer insulator nose length - less heat is absorbed by the plug and transferred to the cooling system - the plug runs at a higher temperature - the plug is more prone to pre-ignition (if greater than 850 degrees C) - NGK BP5ES is hotter than a BP7ES plug. - An overheated plug will be white with brown spots. Cold Plug - has a shorter insulator nose length - more heat is absorbed by the plug and transferred to the cooling system - the plug runs at a lower temperature - the plug is more prone to fouling (if less than 500 degrees C) - NGK BP7ES is cooler than a BP5ES plug. - A fouled plug will be black and sooty.

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Hot and cold plug difference


Hot Plug - has a longer insulator nose length - less heat is absorbed by the plug and transferred to the cooling system - the plug runs at a higher temperature - the plug is more prone to pre-ignition (if greater than 850 degrees C) - NGK BP5ES is hotter than a BP7ES plug. - An overheated plug will be white with brown spots. Cold Plug - has a shorter insulator nose length - more heat is absorbed by the plug and transferred to the cooling system - the plug runs at a lower temperature - the plug is more prone to fouling (if less than 500 degrees C) - NGK BP7ES is cooler than a BP5ES plug. - A fouled plug will be black and sooty.

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Hot and cold plug difference


Hot Plug - has a longer insulator nose length - less heat is absorbed by the plug and transferred to the cooling system - the plug runs at a higher temperature - the plug is more prone to pre-ignition (if greater than 850 degrees C) - NGK BP5ES is hotter than a BP7ES plug. - An overheated plug will be white with brown spots. Cold Plug - has a shorter insulator nose length - more heat is absorbed by the plug and transferred to the cooling system - the plug runs at a lower temperature - the plug is more prone to fouling (if less than 500 degrees C) - NGK BP7ES is cooler than a BP5ES plug. - A fouled plug will be black and sooty.

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Hot and cold plug difference


Hot Plug - has a longer insulator nose length - less heat is absorbed by the plug and transferred to the cooling system - the plug runs at a higher temperature - the plug is more prone to pre-ignition (if greater than 850 degrees C) - NGK BP5ES is hotter than a BP7ES plug. - An overheated plug will be white with brown spots. Cold Plug - has a shorter insulator nose length - more heat is absorbed by the plug and transferred to the cooling system - the plug runs at a lower temperature - the plug is more prone to fouling (if less than 500 degrees C) - NGK BP7ES is cooler than a BP5ES plug. - A fouled plug will be black and sooty.

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Hot and cold plug difference


Hot Plug - has a longer insulator nose length - less heat is absorbed by the plug and transferred to the cooling system - the plug runs at a higher temperature - the plug is more prone to pre-ignition (if greater than 850 degrees C) - NGK BP5ES is hotter than a BP7ES plug. - An overheated plug will be white with brown spots. Cold Plug - has a shorter insulator nose length - more heat is absorbed by the plug and transferred to the cooling system - the plug runs at a lower temperature - the plug is more prone to fouling (if less than 500 degrees C) - NGK BP7ES is cooler than a BP5ES plug. - A fouled plug will be black and sooty.

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1 Answer

Hot and cold plug difference


Hot Plug - has a longer insulator nose length - less heat is absorbed by the plug and transferred to the cooling system - the plug runs at a higher temperature - the plug is more prone to pre-ignition (if greater than 850 degrees C) - NGK BP5ES is hotter than a BP7ES plug. - An overheated plug will be white with brown spots. Cold Plug - has a shorter insulator nose length - more heat is absorbed by the plug and transferred to the cooling system - the plug runs at a lower temperature - the plug is more prone to fouling (if less than 500 degrees C) - NGK BP7ES is cooler than a BP5ES plug. - A fouled plug will be black and sooty.

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1 Answer

Hot and cold plug difference


Hot Plug - has a longer insulator nose length - less heat is absorbed by the plug and transferred to the cooling system - the plug runs at a higher temperature - the plug is more prone to pre-ignition (if greater than 850 degrees C) - NGK BP5ES is hotter than a BP7ES plug. - An overheated plug will be white with brown spots. Cold Plug - has a shorter insulator nose length - more heat is absorbed by the plug and transferred to the cooling system - the plug runs at a lower temperature - the plug is more prone to fouling (if less than 500 degrees C) - NGK BP7ES is cooler than a BP5ES plug. - A fouled plug will be black and sooty.

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