NGK Spark Plug

[rickybudz]

I pulled out the Spark plug to change it and noticed it was a NGK D8EA. The CLYMER Manual calls for a NGK D7EA. So bought the NGK D7EA and placed them side by side. There is no difference in size or length. Which one should I be using and whats the difference? The bike ran with the NGK D8EA! NOTE: I called the Yamaha dealer and they wanted $11 bucks for NGK plugs, the same plug at Napa was $1.50!

[Maico]

The D8EA is 1 step colder heat range.

[rdlsz24]

Never buy plugs from the dealer unless it's a last resort and you can't find them anywhere else lol. I find that my local Advance Auto store has a lot of NGK plugs for small engines.

Rob

[harryredtrike]

Ricky that number difference is the heat setting

[Tecate 50]

Auto Zone or any parts store chain is much cheaper!

[rickybudz]

O.K. the 8 is colder,but what will a colder plug do as apposed to a hotter plug and which should I use?

[harryredtrike]

one number off shouldnt make that much of a difference.i like the hotter plugs but have used both.

[eyecekold1]

Usually you want to run colder plugs in the summer and hotter plugs in the winter, helps with the engine temperature. Yea dealers are rip offs on most things, I went to the clearance section at my local yamaha dealer and stuff is cheaper at rocky mountain atv not on sale.