entropy
Moderator
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posted January 08, 2002 04:51 AM
Sparkplugs?
It seems that many of us have never even had our plugs out of the bike, never mind put "optimum" plugs in.
1. Is there a better plug than stocker?
2. Does it make a difference wrt which plug to use if higher compression is used (1270, 1361)?
3. How long should the origional plugs last?
It is such a pain in the butt to get at the plugs I don't wanna screw with em unless needed.
Any input would be much appreciated
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hondo
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posted January 08, 2002 06:24 AM
Kawasaki offers a "cold weather" plug, probably a heat range hotter. Is a colder plug available?
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Candy Persimmon Red may be slower, but I'm trying!
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catman12
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posted January 08, 2002 06:37 AM
It is not so hard to change plugs...
it takes maximum half an hour.
You should have sparkplug tool in you toolbox supplied from Kawasaki.
/ Mikael from Sweden, Green 2001.
www.kiruna.se/~mgrape
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6.23@126.7mph 1/8mi , 9.44@150.99mph 1/4mi 60" Arm, 1361cc, manual shifting.
http://www.kiruna.se/~mgrape
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hondo
Expert Class
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posted January 08, 2002 07:47 AM
Entropy, probably the stock plugs are the best design. The dual ground straps are the tits! I sure would like to have a couple of sets of colder plugs and one set hotter. The dealer gave me a blank look when I asked about colder heat ranges. I guess I'll have to look up the part #'s and take them to the dealer. Having not looked at mine yet I'm guessing colder would be better for higher compression, N2O, turbo etc.
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Candy Persimmon Red may be slower, but I'm trying!
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entropy
Moderator
Posts: 8671
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posted January 09, 2002 05:38 AM
Thx guys,
I can't believe that I have had the bike for a yr, put 300 passes on it, built the motor and STILL HAVEN'T CHECKED THE PLUGS!
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entropy
Moderator
Posts: 8671
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posted January 09, 2002 06:17 AM
 Edited By: entropy on 9 Jan 2002 06:19
here are the numbers
ZX12 plugs
92070.....92070-1254....PLUG-SPARK,CR9EKPA....4
92070A...92070-1255....PLUG-SPARK,CR8EKPA....4
I assume that the 92070 is the stocker, and that 92070A is colder?, hotter?
I'm gonna buy a set for my 1361 and am leaning towards the stocker. I will be uding Nutec soon, if that is any consideration.
Any comments??
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dougmeyer
Needs a job
moderated
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posted January 09, 2002 09:32 AM
The 8 is hotter. We haven't used anything but the stock ones in any of the 12's we've run. This is mainly due to the fact that there really aren't any alternatives and there doesn't seem to be a need. I have run the surface gap race plugs at Bonneville (piston clearance issue) but they are very expensive and there is no need in general.
Doug
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jessz1
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posted January 09, 2002 09:42 AM
NGK #'s the lower the number the hotter the plug.
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Charles
Novice Class
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posted January 09, 2002 10:04 AM
Denso makes a plug that the race teams use that is a iridium plug. I have seen busas and 1000's gain 1.5-2.5 hp with them. They are the IU27 if you guys use the same as the busa plugs and they go for $12.50 each. Let me know if you need a set.
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Thanks,
Charles
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entropy
Moderator
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posted January 09, 2002 01:22 PM
quote:
Denso makes a plug that the race teams use that is a iridium plug. I have seen busas and 1000's gain 1.5-2.5 hp with them. They are the IU27 if you guys use the same as the busa plugs and they go for $12.50 each. Let me know if you need a set.
Charles,
thx for the info. I have no idea which Denso Iridium plug a 12 would use. I'd be willing to buy some and do tests, but not until I get some degree of consistency at the 1/4 mi. I'll get some new stockers tonight, but would be ready to buy some iridiums in a couple months IF I had some idea which ones were applicable.
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Charles
Novice Class
Posts: 81
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posted January 09, 2002 01:35 PM
Edited By: Charles on 9 Jan 2002 13:37
what is the stock plug part number? I see the CR9E is so the IU27 will be your plug. Just let me know when you are ready.
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Thanks,
Charles
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magzx12r
Expert Class
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posted January 09, 2002 03:00 PM
Charles, were these stock motors that gained 1.5-2.5 hp by just changing out the plugs?
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Mark
'03 ZX-12R
'12 1199S
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Charles
Novice Class
Posts: 81
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posted January 09, 2002 03:05 PM
yes, race engines using nutec was gaining more. i can't say everyone will gain but i am just quoting what i have seen.
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Charles
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MadMike
Moderator
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posted January 09, 2002 05:49 PM
charles! man put a set in with my rear set order cool.
mad mike
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Charles
Novice Class
Posts: 81
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posted January 09, 2002 06:52 PM
quote:
charles! man put a set in with my rear set order cool.
mad mike
just let me know when you want them.
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Thanks,
Charles
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entropy
Moderator
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posted January 09, 2002 06:53 PM
I just put a new set of stockers in and man o' man, I wished I had smaller hands...
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kingzx12r
Expert Class
woo hoo
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posted January 09, 2002 07:37 PM
I have the stock plugs also in the nitrous 12, about 20,000 kms so far and seem fine. 255hp@142ft.lbs if that won't wreck them I guess nothing will. 
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hondo
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posted January 09, 2002 10:04 PM
Good info!
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Candy Persimmon Red may be slower, but I'm trying!
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tuusinii
Pro
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posted January 15, 2002 07:02 AM
Haven't been reading this site for a month due to Xmas holiday. But during this time I changed the plugs for first time and the bike has now 48000km(=30000miles) and the plugs looked still quite good. I've couple times checked some plugs during this time but they've always looked good. And in cars they change these same cind of spark plugs only every 100000km(=63000miles) so I figured that the half of it is a good frequence. I also changed the front fork oils. It wasn't very hard but You need the special tool or something to compress the spring before You can change the oils. But I got away without the special tool with little work.
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dougmeyer
Needs a job
moderated
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posted January 15, 2002 01:11 PM
Would one of you technicians out there mind explaining to me what causal relationship a sparks plug's heat range might have with power output. I might have missed something in the last 40 years and I always like to catch up.
Doug
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madmike
Moderator
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posted January 15, 2002 01:15 PM
lol, doug man you got it going on....
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lubricity
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posted January 15, 2002 03:07 PM
I owe you a drink in Phila. for that one.
HAHAHAAHAHAHAH
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kzz1
Zone Head
"Show me whatcha workin with"
Posts: 908
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posted January 15, 2002 03:19 PM
Put some Splitfire or is it Spitfires in your bike.......gauranteed to give your engine 5 to 10 extra horses   
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entropy
Moderator
Posts: 8671
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posted January 15, 2002 05:17 PM
lost 3 tenths with new plugs!!!!!!
only got 3 shitty passes last Sun nite and dropped 3/10's from my previous best. GODDAMN new spark plugs!!!!!! Of course it could't have anything to do with lighting up the rear tire on the 2-3 shift and going into the limiter, could it??? 
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Koz
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posted January 16, 2002 10:45 AM
Denso vs NGK
Not that this means anything but, I thought I'd mention it. At 50,000 miles I thought I would change the plugs in my truck (Toyota). I pulled the first three plugs on one side of the V6 and found them to be perfect (like new). I then pull the first one on the other side and it's about a third worn (I'm thinking OH SHIT!). The other two on that side are also worn the same. So I'm thinking there's probably a problem with the ignition. I take some more time and lay the plugs out on the bench and I notice that there are two different plugs (three NGKs and three Densos). Needless to say the NGKs were perfect and the Denso's were the worn ones. Moral of the story is, all plugs are not created EQUAL! I'm sure I could have gotten 100K out of the NGKs. I wouldn't even consider using any thing other then NGKs plugs.
Koz
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