What spark plugs do you guys use when using nitrous?... I have the MPS dry nitrous kit.
Will stock replacements work?

I would suggest going one step colder on the plug. I don't know what that is on our bikes.

We use a one step colder plug, and get the "K" model such as the CR10EK, that's what we use over the stock CR9E's in our 2001-2004 GSX-R1000's. The "K" gives you 2 short side ground straps vs. one long one. The stock long one's will turn into a nice glow plug when on nitrous, which's very bad.

Thanks for the info...

Is it any difference in the 2 side prongs vs the 1 long prong when runnin all motor, let me know !!!!!!!!!!!!!!

Is it any difference in the 2 side prongs vs the 1 long prong when runnin all motor, let me know !!!!!!!!!!!!!!



Not any *big* differences... it will be less-prone to detonation whether using nitrous or not - but it's most noticeable with nitrous (because nitrous will really show up any weak points in the setup). The other thing is you probly get about a 0.001 increase in the compression-ratio from the extra space that the 2nd eletrode takes up in the combustion-chamber... but it's so tiny it'd be impossible to notice.

I suppose that it's possible that the spark will be exposed to the incoming fuel-air charge a little differently - and depending on how everything works inside a specific combustion-chamber, you might see tiny differences on a dyno swapping from one plug to another - but which one works best for a specific motor is anyone's guess.

The CR9EK's cost about twice what the CR9E's do - same thing with the JR9C vs JR9A.

Under 40 hp shot........CR9EK's
Over 40hp...........CR10EK's