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svo58
12-24-2004, 02:22 PM
i am running a NGK dr8es,i was reading my spark plug and it looks to be running cold ,what would be a hotter plug to use.It's a 84 honda big red 200es,if i ride in 2nd gear it fouls the plug (dry carbon, not wet and oily) but if i go on a strightaway and get to 4th or 5th gear the plug is normal ,will a hotter plug help.........thanks,svo58
jeswinehart
12-24-2004, 02:45 PM
the next hotter plug is the ngk # 7. the lower the number the hotter the plug.

dry carbon fouling is normally due to eletrical ( weak spark ) ,,, from what i have read anyway ,,,,

john
Howdy
12-24-2004, 03:00 PM
John is correct. Pick up a NGK D7EA to go hotter. ;)

Howdy
RideRed250R
12-24-2004, 04:15 PM
go to br7es cheapest in the series and also has a good metallic tip for better spark
adam
Howdy
12-24-2004, 04:25 PM
go to br7es cheapest in the series and also has a good metallic tip for better spark
adam

I don't have my book in front of me, but from memory the br7es is a different sized plug ( Used in 2 strokes ). The D7EA is a direct fit and they only run $2 from me or $2.50 or so from Napa ( last time I checked ). No I'm not trying to sell any ( other than locally ). Shipping cost makes them more costly. ;)
Howdy
Wickedfinger
12-26-2004, 02:56 PM
BR7ES is the "hotter" resistor type 2-Stroke plug. The thumper plugs should start with a D.
83185s
12-26-2004, 09:26 PM
so he should get a dr7es?..o by the way..my dads kawasaki kz 400 isnt a 2 stroker and it uses a br7es
Wickedfinger
12-26-2004, 10:31 PM
so he should get a dr7es?..o by the way..my dads kawasaki kz 400 isnt a 2 stroker and it uses a br7es

Ok, well you got me with that one .... you had to find an ancient bike from the '70's to do it, but you got me ..... BTW - the KZ400/440 manual lists B7ES, not the resistor type if you want to split hairs as the proper plug.
Glenn J
12-27-2004, 03:38 PM
A slightly hotter plug would be the DR8ES-L. It's not as hot as a DR7ES, but a bit hotter than a regular DR8ES. The DR8ES-L is what the 83-85 200X runs. I believe the "L" is half a heat range higher than the 8.

Best advice would be to go with what your manual recomends, then diagnose the problem from there.
OldSchoolin86
12-27-2004, 04:54 PM
This should answer all your NGK code questions:

http://www.ngk.com/images/ngksparkplug.jpg