Re: GM DIS Upgrade using HEI Modules

Posted by sgtslag on Oct 16, 2012; 4:04am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/GM-DIS-Upgrade-using-HEI-Modules-tp3158051p4030799.html

I had stock coils, but the Iridium plugs made a night/day difference -- tremendous improvement.  I installed the Iridium plugs in my '93 Voyager touring bike:  no discernable improvement, but I do know that they will last 50,000-100,000 miles.  The Voyager's coils are much higher quality, no weakness in them at all.  The real improvement on that bike was longevity.

If you plan to upgrade the coils on your 750, the Iridium plugs will gain you longevity, but not much else (they overcome the weaknesses of the OEM coils).  If you have them already, fine; if not, the standard NGK plugs will be good.  To see the improvements they offer, with the new coils, would require an exhaust gas analyzer -- that's about the only improvement you will be able to quantify, is lowered emissions.  Not facts, just my edu-macated guesses.    Cheers!