BR9EG or BR8EG KX500

[dans89kx500]

With the 89 KX5 should I run a BR9EG or BR8EG? What is the difference?

Daniel in Vacaville

[KXcam22]

Stock bike uses a BR8 heat range.  I would suggest the BR8EIX over the G or V.  Those are old tech and the EIX is the irridium electrode that has proven to outlast anything with the best flame from.  Most new vehicles come with these for a reason.  cam.

[FuriouSly]

8 is hotter than a 9.  G is one upgrade over an S.  V should be the minimum.  Got the bucks run the irridiums like Cam sayzzz....

Sly

[Hillclimb#42]

Is there a difference with plugs even with the same numbers? I found a box of ten B8ES @ Pep Boys for $10 and change, but the plugs seemed to foul easy. I noticed the electrode and the whole bottom of plug was an aluminum-colored silver and my old ones from the bike shop were a copper-color.

[CR480R]

I wouldnt waste the money on the EIX... IMO they are no better than a standard ES.... I run B9egv's in all of my bikes

[FuriouSly]

Two plug threads going.... eeekkkk.

Is there a difference with plugs even with the same numbers?

Generally speaking, the numbers represent the heat range and in compatible/matching plugs they mean the same thing.  But, sometimes in a stock bike that is a little old in the top end, people run hotter plugs (8 or 7 which is hotter) to help the ole' betsy to run right and not foul when putt putting around.

bottom of plug was an aluminum-colored silver and my old ones from the bike shop were a copper-color.

Sometimes that is purely manufacturer preference on colors....  sometimes to help identify the plug types (quality in a brand) at a glance or for wow factor....
The electrodes (center and ground prong) materials are the biggest difference in the plug type classes.

Sly