DO NOT TRUST ANYONE WHEN THEY SAY "I don't remember the part #, but I put in what was reccomended." !!!!!!!!

So I change coolant this evening, no problems (except I feel really strange putting in orange coolant (50/50 "all makes all models" with water wetter added) in something that I know takes green coolant :?

So my plugs will be here tomorrow because I figured maybe he put in the platinum plugs, so it's about time to change them out for the irriduims... I go ahead and take the tank and airbox off... also found out bike was running a bit funny at 1/8 throttle ~4k when it hadn't been before, along with the reason I was losing a bit of oil when running at high rpm... the crankcase vent tube was off of the airbox... duh... This also makes sense about how I'm running through 1/4 qt of oil in 3000 miles now, but burnt NOTHING before... funny thing about that...

Anyway, I get the first plug out just for curiousity sake and lowe and behold, it's a Champion G59C... First, it's a Champion... in my bike... no. Second, that plug is a copper electrode plug... although the edges aren't really worn, it's been in there for at least 10k miles, because I've had the bike for 9800 miles and haven't touched them... This may also have something to do whith degraded performance... At least they're the right reach and I assume the 9 means they're the right temperature range... Also, this is a "racing plug" so it doesn't have a resistor in it, which I don't know if is the same as the NGK or not... Oh well... shit happens... we'll see how it runs when I get the right plugs in and the breather tube cleaned up and hooked back up I guess...

Mike

The non-resistor, copper racing plugs will actually give you improved performance over the platinums or iridiums. Problem is, they need to be changed frequently.

They're defiitely the wrong heat range, though, according to this chart:

I thought the NGK iriduims were a 9? CR9EHIX-9 A 9 in NGK would be a 59 in Champion right?

Either way, they performed really well until the last ~4k miles or so, where they started to drop off... I'll let you know what differences I feel when I get them in...

Thanks,
Mike

My bad :oops:

I quickly read your original post, and thought you had a Champion heat range "9" .

You're right, the original plugs are a 9.

So I've got my iridium plugs in for 30K miles now without any noticeable performance loss.

When should I change them?

Keep in mind it took till 30k miles till you guys convinced me to replace the origional platinum ones. (they still looked fine)

I've got the extended life antifreeze in now will also change to the all makes and models stuff.

NOW! :shock:


IMO, of course...

SCORE! Bike starts, idles, and runs MUCH better now! It's almost like I have new plugs in it or something! :wink:

Mike