Changing the spark plugs

[vonrapier]

Just want to know what type and which plug to use to replace fouled plugs in my 1989 katana 600. I do not have an owners manual and the bike has been sitting for 6 years. I suspect that the plugs are fouled. I have changed the gas already and the other day she started up but was running a little rough and I suspect it was the plugs.

Can anyone assist?

Von

Also what gap to set them at.....

[akarob]

The carbs gum up fast if it's not ridden. I'd suspect the tiny holes in your emulsion tubes need to be cleaned (with a .020 wire).

Sorry to all the guys that are tired of hearing me keep saying it, but it works perfectly.

[kevin2502000]

1988 - 1995:
NGK DR8ES (standard)
NGK DR8EIX (iridium)

[BareKat]

Buy new plugs here: http://katriders.com/vb/sales.php

[steves]

I have plugs in stock here, ready to go.

[stonefry]

I do not have an owners manual ...

Here's the service manual

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

[katanarider]

DO NOT OVER TIGHTEN THE SPARK PLUGS !!!
I just broke one off in my cylinder head and I'm not having much fun these last several days. Be very careful and just barely snug it !

[scottynoface]

DO NOT OVER TIGHTEN THE SPARK PLUGS !!!
I just broke one off in my cylinder head and I'm not having much fun these last several days. Be very careful and just barely snug it !

Ouuuuuuch...

[vonrapier]

Thanks ...Good comments......

Regards

Von

[DHolzwarth]

By the way, the plug gap is 0.6 - 0.7 mm.

But I have never needed to gap a fresh NGK, they come out of the box right. (Never used the Iridiums, though.)

[1990gsx 600]

mines gaped at .10

[JasonChen]

Be very careful and just barely snug it !

the correct answer is to torque wrench it

[KatanaStud]

wow