clarification for pre sparkplug part number

[Gitter]

Hey guys,

reading a couple threads found a part number for ngk plugs, # was CREK9

I checked the ngk website and the part number they have listed for a 93 katana 600 is DR8ES.

Can someone clarify which part number I should use to order?

thanks

gitter

[Kreylyn]

Hey guys,

reading a couple threads found a part number for ngk plugs, # was CREK9

I checked the ngk website and the part number they have listed for a 93 katana 600 is DR8ES.

Can someone clarify which part number I should use to order?

thanks

gitter

NGKs website should be correct.

Krey

[Gitter]

ok thanks

[arsenic]

What year exactly? The pre 600 has two. 88-95 and 96-97.

[Gitter]

its a 93

[Badfaerie]

What year exactly? The pre 600 has two. 88-95 and 96-97.

I got bit by this one. I got a set of plugs for the 95 600 and we changed the engine out before installing them. When we got the 96 I thought "great, we already have plugs!" and they weren't even almost close.

I seem to be collecting NGK plugs...

[MikeyZ]

DR8es

[scottynoface]

Interesting, why the difference in size and gap chris? Thought the engines were the same.

[steves]

Bottom line, is that because of how interchangeable the parts were, and how long they were produced, you need to verify what's in your head before you order parts.

http://katriders.com/wiki/index.php5?title=Spark_Plug

CR9ek's have been found in engines as old as 1996.

"D" is a bigger size hole.
the number is the heat range. the 8 is a hotter plug than the 9.

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

[hardlydangerous]

DR8ES or DR8EIX

different maunufactures for the head is likely the reason but who knows. plug performance is the same between the two sizes

[arsenic]

Interesting, why the difference in size and gap chris? Thought the engines were the same.

The difference in plugs actually makes a lot of sense. The 98+ Katana's use the NGK C series plugs. Well, in the UK a lot of the 1998 changes began in 1996. So , in the US the plugs for the 98+ Katana began in 1996. The engines are the same BTW. Other than a few minor changes in the 96-97 model. The cam chain, the cam chain tensioner, the cam chain guide (the 88-95 has an idler gear). It's a bunch of little random stuff that the 98+ Katana has that started in 1996.

[Gitter]

So best bet is to go pull a plug from the bike before buying new ones?

[arsenic]

Indeed.

[Gitter]

The part number on the plug I pulled out is jr9c. Should I get the plugs listed on the website?

[arsenic]

What brand are they? I know NGK has a part number like that. I know what C and D stands for in the p/n but I don't know what a J series is. I don't feel like looking it up.