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hi folks , what's your opinion on this plug colour ? i swopped from a b7es to b5es ( only spare i had at the time and 2 clicks down on the ideal heat range ) my bike is a 63 g80cs 30 pilot , 3rd position down from top on the clip , and a 380 main jet , i had in a 440 main jet but she fouled a plug with black sooty deposits , i was doing quite a bit of around town riding so had no chance to 'open her up' at the time she fouled . regards
andy