Spark plug ? NGK DPR9EA-9

This is the plug that I pulled out of my 03 650R. Apparently, that's not the plug the manual recommends.

I'm wondering if I screwed up or if that was a recommended plug that I read about some where? Anyone know?

Thanks

i just bought a honda xr 600 r 1998.the plug is a ngk dpr8ea-8 the #9 used is one size hotter for riding in very cold weather good luck ! :thumbsup:

NGK plugs get "hotter" as the number gets smaller, so a 9 is one heat range colder than an 8. The "P" in the plug designation refers to a projected electrode. I know that it is important to run the projected electrode type in the aircooled engines, don't know about the 650R.

For extended high speed operation in hot temps a colder plug is recommended.

The 650R stock plug is a BKR7E-11. That's two heat ranges hotter than what you had in there. Otherwise the stock plug is missing the projected electrode, it has a different hex size, and the gap is larger.

http://www.ngksparkplugs.com/docs/tech/partnumberkey.pdf

also, the heat range is just how quickly or slower the plugs radiates heat away from the head.

a plug doesnt generate any certain amount of heat.

:thumbsup: :thumbsup: :thumbsup:

also, the P stands for platinum. it does on ND plugs. by that chart it does for ngk too.

also, the P stands for platinum. it does on ND plugs. by that chart it does for ngk too.

It depends on where the P is in the part number. Before the heat range and it means "projected insulator type." If it is after the heat range then it means "premium platinum".

SORRY,I WAS TOLD THE HEAT RANGE GETS HOTTER WHEN THE # IS HIGHER

MY MISTAKE.I PRINTED THE CHART THAT WAS ON THE NEXT POST,COOL STUF AND THE RIGHT INFO THANKS :thumbsup:

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