Pulsar plugs help get better fuel economy, better torque, easier starting, and lower emissions. Most mechanics recommend the Pulstar plugs.
Use Denso Iridium spark plugs.
Denso SK20R11 Iridium Long Life, OE replacement.
I just put Denso Iridium spark plugs in mine (part #IK16): http://www.densoiridium.com/index.php But these are by no means the only kind of spark plugs you can use. Before these I had SplitFire Platinum.
NGK or Denso, are the only two brands I would use, but buy platinum or iridium, they last longer and will provide easier starts, better fuel economy, and even slightly better power... they're well worth the extra money
Plug Manufacturer TC88/95 Engine Plug Gap .040" H-D Standard 6R12 H-D Gold 6R12G H-D Platinum 6R12PP Champion RA8HC Autolite 4164 Autolite Platinum AP4164DP2 ACCEL 2418Y2418P Splitfire SF416D Screamin Eagle EX12SEX12P ACDelco NGK DCPR7E Bosch Denso Iridium IXU22
The following spark plugs are specified for a 1990-1999 Yamaha RT-100: NGK B7ES (or if you want to upgrade to iridium, BR7EIX) Denso W22ES-U (for the iridium version, IW22) FYI, the spark plug gap is .022"
Remover eng top cover, cross shock bar support and 6 coil packs...Used denso or ngk plugs which are platinum... Remover eng top cover, cross shock bar support and 6 coil packs...Used denso or ngk plugs which are platinum...
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I'm just now learning about spark plugs, but I read that the ignition system may not recognize the voltage used in the iridium plugs. They require less voltage than platinum to start the engine. The iridiums have a smaller tip, requiring less voltage. The ignition system just doesn't recognize the voltage probably.
For a 1999 Mazda 626, the best spark plugs are typically NGK Iridium IX or Denso Platinum plugs, as they offer excellent performance and longevity. The recommended gap for these plugs is usually around 0.044 inches. Always check your owner's manual for specific recommendations and ensure proper installation for optimal engine performance.
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