Jump to content
Sign in to follow this  

I searched before posting

Recommended Posts

I know its a dead horse on here, but i couldnt find an exact answer. My 91 yz 250 came with a ngk b8eg plug. Obviously non insulated, obviously a racing plug. Ive read about the resister not making a difference, but would a b8es be sufficient since i dont race? I figure the bike was made to race, but didnt know if the basic plug made that much of a difference. Ive read enough opinions either way to be confused.

Share this post


Link to post
Share on other sites
Ive read enough opinions either way to be confused.

Then I guess it is time for you to just pick and form your own opinion. By asking, you are going to be reading all the same varying opinions that you found when you searched. So, it just comes down to pulling the trigger.

Share this post


Link to post
Share on other sites

the g on the end of the plug number just stands for gold. In other words, it was a gold tip plug.

The b8es will work fine.

Share this post


Link to post
Share on other sites

I can't thell the difference between the ES and the EG on my '94 YZ... except that the ES is about $5 less per plug. I found a great article on this exact topic last week. It seems that the improtant part is that the plug is a resistor type; the "R" in BR8** means it's the resistor type, so no worries about messing up your CDI or anything.

I am running an EG right now. But next time I'm due it will be the ES.

Share this post


Link to post
Share on other sites
It seems that the improtant part is that the plug is a resistor type; the "R" in BR8** means it's the resistor type, so no worries about messing up your CDI or anything.

Not sure if it was a mis-type, but both yamaha and ngk recommend a non-resistor, so that is what im going to run. The dealer did say not to worry about the 'race' plug and that he recommended the es, so there i go i guess. Thx for all the input.

Share this post


Link to post
Share on other sites

Fouling is a jetting thing.

Cheap plugs work fine and generally last a bit longer. The visible difference it the size of the electrode. The more expensive plugs have skinny little guys while the cheaper ones look a lot like a stereotypical spark plug.

LOTS of guys run ES plugs. You should run an "R". But I haven't seen anyone damage their bike by running a non-resistor plug.

Share this post


Link to post
Share on other sites

The fiche says BR8, so....

I know everyone has an opinion etc etc :lol:

the BR8EIX is the irridium plug, and it costs a fortune (like 12 dollars or something) but I haven't ever fouled one since I switched to these. with the BR8ES and EG I was fouling 3 or 4 per season.

just my $.02

Share this post


Link to post
Share on other sites

You've got jetting issues. I can run anything and run it until the gap is too wide. Fouling just doesn't happen. If it does. Something's wrong.

Share this post


Link to post
Share on other sites
The fiche says BR8, so....

I know everyone has an opinion etc etc :lol:

the BR8EIX is the irridium plug, and it costs a fortune (like 12 dollars or something) but I haven't ever fouled one since I switched to these. with the BR8ES and EG I was fouling 3 or 4 per season.

just my $.02

These are what i looked at. I dont have an owners manual or fiche myself, so went from these. What one said br8 that you looked at?

http://www.motosport.com/dirtbike/oem-parts/YAMAHA/1991/YZ250/CYLINDER-HEAD

http://www.cheapcycleparts.com/model_years/5369-yamaha-1991-yz250-yz250b1/assemblies/166267

either way the dealer said it didnt matter, as long as the temp was the same. Hed run the resistor so as not to interfere with anything on someone elses machine. So i guess thats where im at. Ill use the b8 until it goes then use the br8. Thx again for all the posts

Share this post


Link to post
Share on other sites

B8 it is, Golden sunbeams. Use any B®8*** plug you can find in some guy's butt bag and you are on it like spooge on googles buddy!

Share this post


Link to post
Share on other sites
B8 it is, Golden sunbeams. Use any B®8*** plug you can find in some guy's butt bag and you are on it like spooge on googles buddy!

Weird....

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×