EvilTwin Posted April 7, 2009 Report Share Posted April 7, 2009 I'm putting new plugs in my bike, and the old plugs are gaped at about 35 and the new ones I bought are about 30, should I gap the new ones to match the old setting? Does it matter? Quote Link to comment Share on other sites More sharing options...
KruelHouse Posted April 7, 2009 Report Share Posted April 7, 2009 Are they iridium plugs? If so, then no. Iridium plugs come gapped to spec already. Quote Link to comment Share on other sites More sharing options...
EvilTwin Posted April 7, 2009 Author Report Share Posted April 7, 2009 They are regular NGKs Quote Link to comment Share on other sites More sharing options...
flounder Posted April 7, 2009 Report Share Posted April 7, 2009 Read the shop manjual and see what it tells you your gap should be.. Just because your others were at 35 doesnt mean thats right. And just because the new ones are at 30, doesnt mean thats right.. The manual is your friend. Quote Link to comment Share on other sites More sharing options...
EvilTwin Posted April 7, 2009 Author Report Share Posted April 7, 2009 If my bike is jetted would that change spark plug requirements? Quote Link to comment Share on other sites More sharing options...
McLovin Posted April 7, 2009 Report Share Posted April 7, 2009 Are they iridium plugs? If so, then no. Iridium plugs come gapped to spec already.I must of got a bad Iridium batch because none of the 4 plugs were the correct gap compared to specs for my bike... Quote Link to comment Share on other sites More sharing options...
ReconRat Posted April 7, 2009 Report Share Posted April 7, 2009 On regular ordinary plugs your best gap is the largest one that does not decrease your 1/4 mile trap times/speeds. Of course, you need multiple trips down a track to find that out. The gap given in the owner's manual/shop manual is fine unless you find out something else is actually better. I wouldn't consider increasing the gap unless I had modified my secondary ignition (hot side of the coil, high voltage).Iridium plugs have a large gap based on the design. If anything, misfires might result in having to decrease the gap. Difficult to do, and easy to damage the plug.btw, do not bend ECS electrodes. See pic below, standard electrode on left, ECS style electrode on right. Both are NGK. If an ECS gap isn't correct, take it back and exchange it for another one. Quote Link to comment Share on other sites More sharing options...
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