What plug do you guys use in 04 KX 125???

[Polamer]

The book for a 2004 KX 125 calls for a R6918B-9. Dealer said this is only plug listed for this bike because the ground electrode has to be welded on. Also said that if you use a cheaper plug, that due to the harmonics of the motor the ground electrode may break off and cost you a top end. I called Kawi and they said I could use a BR9EIX. BTW the R6918B-9 runs between 28.00 and 34.00 dollars. So I was wondering if anyone out there has any experience and advice on this situation. Thanks

I don't mind spending the money for the correct plug but it would be nice to use a cheaper plug until I get the bike properly jetted.

 

[benloos404]

br9eg

 

[MXP1MP]

I ran in mine the plug that is listed I know it's exspensive at $29 for just a plug! but the whole electrode breaking off deal is why kawie upgraded to the plug in '03 from the BR9EIX to that plug. I never fouled the plug in my KX when I ran these jetting spec's one leaner on the pilot 2nd needle clip pos and 2 leaner on the main to #400. readjust the air screw to 1.5 turns out. When I sold my KX this past dec the plug that was in it had ball park 65 hrs on it and it was still going strong! Thought the plugs are more exspensive they also resist fouling better and can be ran for much longer intervals.

I know people have run BR9EG's and BR9EIX's no problem but you take the possible risk of it braking if must have been enough of an issue for kawie to change it. I went with the stock plug for that reason for peice of mind. If I ran BR9EIX'S I would have been swapping them every 30 hrs just to do my best to avoid it from happening.

 

[elcamino12sec]

Buy the expensive one and then purchase a spark plug cleaner from Harbor Freight for 8.95 (on sale half price) Then clean it every now and then.

 

[Chili]

I would use the cheap ES or EG plugs while I sorted my jetting since none of those plugs would be in the bike for more than a ride. Once my jetting was sorted we always go to the special plug since it is spec'd for my son's Zook 125 as well.

 

[TimberPig]

Buy the expensive one and then purchase a spark plug cleaner from Harbor Freight for 8.95 (on sale half price) Then clean it every now and then.

There was just a thread on here about this a couple days ago, and most felt that anything that could potentially put sand in your motor, wasn't desirable. A torch works better, with no chance of sand sticking in the plug, coming loose, and wrecking your engine.

 

[elcamino12sec]

I spray out the plug with brake cleaner and blow it dry with 110psi air when Im done with the cleaner. It takes me 5 minutes. I would rather re-use my plugs than give NGK another few bucks. A much as most people ride I dont feel that any one can really wear one out. I guess Im cheap but I cant see continuesly buying new ones when that fouled plug can be cleaned like new in the matter or 5 minutes. Just my .02 though, like I said, maybe Im just cheap, its your money!

 

[SirHilton17]

I use BR9ES in mine... if your bike is jetted correctly you shouldn’t foul plugs very often, so there is no need to sandblast them... and if you bike is jetted correctly and it does happen to foul a plug and it has been in there a while, just get a new one... plugs wear out rather fast on these bikes...
I would not run a plug for more than 20 hrs if it is a cheep ES, because they are cheep and it is just worth it.

I did have a EG come apart on me once... the insulator came unattached or something and slid down the center electrode and was stopped by the other electrode (the on that is welded on) so it didn’t go into my engine... but the bike acted really funny with it like that. It was like it was fouling the plug, but it wouldn’t clean out...

 

[Rich Rohrich]

I guess Im cheap !

YA THINK???? :rotfl:

 

[CamDayKX125(4)]

i use BR9EG and BR9ES in my kx.