spark plugs

[seamonkey]

Hello, Just thought I'd share a recent experience with you all. I ride (sometimes it rides me) a '99 cr250. I was screwing with the jetting because I couldn't get any power down low where I wanted it as I ride trails mostly. Well I succeeded in jetting it running very rich, so I was at the local shop looking for a size 45 slow jet and they didn't have one so they gave this guys number that they knew that used to race the late '90's cr's. Well I gave him my bike to work on for a week or so and he got it to not blow so much much smoke. But now to the subject of the title. The man tells me that he changed my plug because mine was looking not so good. Well I am just curious how it's running so I take out the plug to check the color and it's a nice light brown, but I have a new plug that I put back in just for giggles. Well the darn bike starts and idles for a few seconds then quits. So I take the plug out and sure enough I have 2 different plugs, I have the ngk br8eg that the shop sold me for my bike, and I have a ngk b8es that the race guy replaced my plug with. So I put the b8es back in and the thing idles great again. There is a huge difference in the size of the electrode that sends out the spark between the two plugs. They are both the same temp plug, but from what I've read the br8 has a resistor in it which is supposed to make the bike run better at very high rpms, but from what I've noticed it also makes it run crappier at the low rpms. I don't notice any power loss with the b8es and I can set my idle a lot better, and the plugs are about $3 cheaper. I read how the br8eg is supposed to be so much better and deliver more horsepower and better ignition, then why won't my bike idle with one? Just another example of how newer high tech and more expensive isn't always the best choice. Oh yeah and if you ride trails at all with your cr invest in a flywheel weight, I am so much happier with the way it handles.

[boogieonmyfinger]

Here's an interesting article about plugs.

http://www.nightrider.com/biketech/spkplghnbook.htm#Today's

[seamonkey]

Maybe the cr's were originally supposed to come with radios? Since I don't have a radio, they're saying that it might be messing up my CDI (ignition control module). Well I'll take my chances, cause the bike really runs better.

[KX02]

Well, before you draw any conclusions I would say you need to start with two NEW plugs. When I first got my bike I was experimenting with plugs a little and after a while I decided to put the original Iridium plug in, it was fine when I took it out. Anyway, I put it in rode to the end of my driveway and the bike died. I threw the plug in the trash. You just can't trust a used plug.

[seamonkey]

Yeah, but the resistor plug was brand new. The non restor plug that worked better was the used one. I'm sold on the non resistor plug, you could tell that monkeys will fly out my tailpipe unless I change back, and I wouldn't until I see it. I was just putting this out there, that maybe someone else would find this info useful.

[dixienw123]

i always try to use the resistor plugs whenever i can, seems to make my bike run smoother.