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honda400exrider
03-18-2002, 07:18 AM
i am about to change my plug in my 400ex and was wondering if you quys has a suggestion of a "better" plug. i don't know if it makes a difference but if there is who is the best? thanx :D

Deathbringer
03-18-2002, 01:44 PM
NGK...works great for me... the only thing you may do is get a little cooler plug...

Adam496
03-18-2002, 02:40 PM
id go with the spiltfire plugs

Deathbringer
03-18-2002, 03:04 PM
Don't waste your money.... the NGK work just fine.

300eXTraILRyDeR
03-18-2002, 03:06 PM
NGK never let me down!!!

Blysster
03-18-2002, 04:22 PM
NGK all the way...

9 runs a bit cooler. some say it can help prolong the life of your engine but I'm not sure how true that is...

I tired the splitfire and the only difference I noticed was the higher price for them

Chef
03-18-2002, 05:10 PM
I run a DPR9Z, if you have any engine work done, over 10.5:1 compression, i would give this plug a try. Make sure its gapped right too. The gap can change the performance from great to not wanna accelerate on mine..

PsychoDave
03-20-2002, 10:47 AM
I run a DPR9Z....it runs great.