keith565 Posted June 5, 2012 Share Posted June 5, 2012 looking through my service manual, i've noticed that my bike has 2 sets of plugs (i know it has 4 in total being a V twin), but it's the first bike i have had with 2 different sets of plugs, pmr8b long life for the inside and bpr6es on the outside. i was wondering if it would make any difference in performance/fuel consumption etc using the long life all round. i always used NGK platinum plugs in my cars and bikes. also, how long should i leave between changing the long life ones. Quote Link to comment Share on other sites More sharing options...
eastanglianbiker Posted June 5, 2012 Share Posted June 5, 2012 its saying one side of the combustion chamber runs hotter than the other side dueto the way the engine is built at a guess so it has 2 different heat range plugs in it Quote Link to comment Share on other sites More sharing options...
Colin the Bear Posted June 5, 2012 Share Posted June 5, 2012 So this is a V Twin with 4 spark plugs? Trawled the net a bit but can't find much. I'd be sticking to the recommended plug type. Mixing and matching may cause you all sorts of problems and invalidate any warranty. You know how temperamental these fancy tractors can be. Quote Link to comment Share on other sites More sharing options...
davefly76 Posted June 5, 2012 Share Posted June 5, 2012 I'm with CtheB. Stick with what it should have and you can't go wrong. Besides, any difference in performance/fuel economy will be so slight that its not worth bothering with. If its that that you're after then I'd start by removing the panniers when they aren't being used Quote Link to comment Share on other sites More sharing options...
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