cascao Posted June 19, 2017 Report Share Posted June 19, 2017 (edited) Anyone can help me with this spark plug reading? (movie below) There are two colors at isolator. Black portion is turned to the back of the bike and white portion turned to escape window. This new NGK BP5ES rode 20km. The bike is Sherco ST300 2015. The previous spark plug was an BPR5EIX and had a good brown color. See the spark plug movie Edited June 19, 2017 by cascao foregin language woes Quote Link to comment Share on other sites More sharing options...
basil Posted June 19, 2017 Report Share Posted June 19, 2017 I have a similar colour on our 280 G/Gas 2014 ive raised the carb needle one notch not checked it since Would have expected a more biscuit colour especially just doing closed circuit trials Quote Link to comment Share on other sites More sharing options...
spen Posted June 19, 2017 Report Share Posted June 19, 2017 A lot of modern fuels give strange plug readings..... Quote Link to comment Share on other sites More sharing options...
cascao Posted June 20, 2017 Author Report Share Posted June 20, 2017 But.... two collors on same isolator? Quote Link to comment Share on other sites More sharing options...
andrewmorpeth Posted June 20, 2017 Report Share Posted June 20, 2017 That bp5es has no resistor and might give interference to the ecu. Quote Link to comment Share on other sites More sharing options...
cascao Posted June 21, 2017 Author Report Share Posted June 21, 2017 No ECU! Good old CDI Quote Link to comment Share on other sites More sharing options...
chewy Posted June 21, 2017 Report Share Posted June 21, 2017 reed valve...piston rings...???????? just guessing...something strange going on in there is this same with any plug?....is resistor plug standard? Quote Link to comment Share on other sites More sharing options...
cascao Posted September 28, 2017 Author Report Share Posted September 28, 2017 Update: there was a leak on base gasket near reed valve. Changed base gasked a month ago and no more two colors on same spark plug. Thank for everybody who posted here. 1 Quote Link to comment Share on other sites More sharing options...
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