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.
Denso IK20 is the best ! Better even than NGK BKR6EIX
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...
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.
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Denso was created in 1949.
Lifted from a post on ToyotaNation.Does yours use the OEM twin ground platinum electrode spark plugs? They are specifically used for the later model Gen 4s (Camry) with twin coil packs and distributorless. These use a waste spark ignition, therefore the plugs fire twice during a 4 stroke cycle. If you use a single ground electrode, it will severely shorten the life of the plug. e.g. 6,000rpm on your Camry engine will be like running 12,000rpm on another car, since the plug fires twice as often. You can also try double platinum plugs, i.e. plugs with a platinum chip also on the ground electrode. What happens in waste spark ignition is that 1 coil pack fires 2 spark plugs simultaneously, e.g. cylinder 1 and cylinder 4. So while one spark plug is firing normally, spark jumps from center electrode to ground electrode, the other spark plug is firing in reverse, i.e. from ground electrode to center electrode, therefore there is high wear on the ground electrode, this is where the platinum chip on the ground electrode gives longevity. Plugs like Denso Iridium SK20R11 and VK20 also have a platinum chip on the ground electrode. NGK Iridium IX and Denso IK20 don't. BOSCH R3 Platinum2 18-3770-8 spark plug is an alternative choice. Had replaced with these spark plugs for 2 years now, so far so good. By the way, the original stock Denso plugs were still very good after 100,000 miles (160,000kms). IMHO that they could go at least 200,000 miles before needing replacement.