Spark Plugs

[GavD]

Alright guys,

The owner manual and Haynes manual state DPR9EA-9 but the NGK website says DPR8EA-9.

What's the score there then? whats everyone running? Anyone tried the Iridium type special ones or anything else out of the ordinary?

Gav

[Mustang]

either one will work fine ...........the 8 is the normal heat range plug and a 7 is a hot plug and a 9 is the cold plug

Triumph says use the 9 because they have them leaned out on the jetting from stock

a 7 would work really well if you were running rich mixture .

[GavD]

I've put 105 mains in and I'm running 40 pilots (Keihins), so I'm probably better off with 8's right??

[Mustang]

yep ............

[GavD]