Spark Plug

[Martin6]

I spent a very pleasant afternoon in the garage today, chasing down my warm tickover issue (off the choke).

A basic question: One thing I noticed, the manual specifies NGK D8ES plugs. David Silver sells  DR8ES and this is what I have on the bike. Does the 'R' mean resistor? I also have 5k-Ohm plug caps. Is it OK to run resistor plugs together with resistor caps?

Thanks, Martin

[Nurse Julie]

No, you either use resisted plugs OR resisted caps. The usual combination used is D8EA's with NGK resisted plugs.

[Erny]

What I know, that R really means resistor, but not 100% sure. And running resistor plugs with resistor caps is definitely not OK.

You can confirm if plugs have resistor by measuring them with multimeter

[K2-K6]

I feel they work fine together,  there's debate to be had but one forum member won't let that happen 

[Sesman]

Mine works fine with resistors in both….at least for now. I’m also confident that if those on this forum have experienced issues, they certainty exist.

[Nurse Julie]

Martin has the correct plugs in his bike, as he said the manual states D8ES. The ones David Silver sells are DR8ES. The modern alternative to the D8ES, which NGK stopped making years ago, are the D8EA.

[Sesman]

Absolutely, I had a right going on with Greenspark after being wrong footed by DS. Do they know? Oh, Greenspark we’re excellent by the way.

[Nurse Julie]

Absolutely, I had ar right going on with Greenspark after being wrong footed by DS. Do they know?

DS has been told by hundreds of people on hundreds of occasions 🙄🙄🙄

[Sesman]

Dear me….I’ll add to the numbers 😁😳

[Trigger]

Gave up with NGK plugs some years ago now, with too many copies floating about and only use Denso now, and much better spark 

[Martin6]

Martin has the correct plugs in his bike, as he said the manual states D8ES. The ones David Silver sells are DR8ES. The modern alternative to the D8ES, which NGK stopped making years ago, are the D8EA.

Unfortunately, i don't have the correct plugs. I have the DR, resistor plugs, as well as the resistor caps. Could this be the cause of my poor running? It starts OK, but needs throttle and dies once the choke is off. Timing and points gap checks out OK. Valve clearances are fine. An afternoon on the carbs tomorrow, but I'll be looking for D8ES plugs from a reputable source.

[Sesman]

Or take Triggers tip and go alternative….?

[Martin6]

Which Denso plugs? X-24ES?

[Trigger]

Which Denso plugs? X-24ES?

24's are fine on a 750 sohc 

[Martin6]

Thanks