cb400f spark plugs

[timeconsuming]

Hey guys

I just popped out my plugs to have a look and found these crust covered tips:

In my clymer's it's got four plug types listed:

NGK D8ESL
ND X24ES
BOSCH X290 T-17
CHAMPION A8Y-MC

I've currently got the NGK's equipped but it seems they had a rough life (though I'm not certain how old they were when I bought the bike not too long ago).

I'm pretty unaware of the different brands and what they entail, anyone knowledgable enough to shed some light for me?

 

[timeconsuming]

And I've read that the NGK D8ESL is now called the D8EA, any truth to that?

 

[Big R]

Without knowing the history of the bike (and those plugs), I would go with new NGK's and keep an eye on them.

NGK has a chart that explains each letter of their plug designations - might try comparing the old number to the new one.

 

[timeconsuming]

Yeah that was sort of my thought to stick with the NGK's since that's what it was running well on before.

Any one have any other suggestions?

 

[Dingo]

I'm also in the middle of a cb400f project, and found this list of alternatives to the DR8ES-L plugs:

http://www.sparkplug-crossreference.com/convert/NGK_PN/DR8ES-L

 

[timeconsuming]

Thanks man!

Details about NGK DR8ES-L:
Threaddiameter: 12mm
Threadreach: 19mm
Seattype: flat
Hexsize: 18mm
Tipconfiguration: non projected
Construction: Standard construction
Terminaltype: Threaded-Terminal

Possible spark plugs:
AC Delco R121XLS
Accel 882
Accel 842
Autolite 3964
Autolite 4163
Autolite 4143
Beck Arnley 176-5230
Bosch XR4CS
Bosch stk 7701
Champion RA6HC
Champion RA6
Champion RA4HC
Champion RAX94C
Champion RA8HC
Champion OE073
Champion stk 810
Champion stk 809
Denso IX24
Denso X24ESRU
Denso X24ESR-U
Denso Iridium IX24
Denso Iridium stk 5372
Denso stk 4101
General Motors 5614066
Honda 98069-38716
Motorcraft HG2C
Motorcraft stk 87
NGK stk 2923
Prestolite 12G2,12G3

 

[Dingo]

you're welcome

 

[VonYinzer]

Without knowing the history of the bike (and those plugs), I would go with new NGK's and keep an eye on them.

NGK has a chart that explains each letter of their plug designations - might try comparing the old number to the new one.

Yup. They could simply be old and worn. Really need a bunch more info on the specifics of your bike to determine anything outside of the fact they you need new plugs.

Anyhow... You need to make sure that whatever plug gou decide to use (I'd stick w NGK, if its good enough for Honda...) is in the correct heat range.

Also, if you don't have one you need to get a good repair manual. It will discuss plug options and have detailed pics that will allow you to dignose spark plug wear/condition.

 

[timeconsuming]

Yeah understandable, I figured if I knew how old the plugs were it would help.

Also I've got a Clymer's manual so that definitely helped!