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Discussion Starter #1
Ok, my bike has just over 6,000 miles on it, its been popping a little bit, not sure if its just the pipes, or the tune, so I pulled the plugs(I hate NGKs by the way) and they are a little rich looking. The sticker on the frame says the plugs are suppose to be CPR6EA 9 the plugs that are in it are CPR6EB 9 is there a difference? Is everyone running the NGKs? What else are being run in these? I have had better luck with champs in my other bike, and that was japanese. How about Iridiums? thanks
 

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Link to NGK spark plug identification: http://www.ngksparkplugs.com/docs/tech/design_symbols_plugs.pdf

NGK FAQs (very informative): http://www.ngksparkplugs.com/tech_support/spark_plugs/faqs/index.asp?mode=nml

Check out how to read your plugs...

Without trying to turn this into another oil/octane thread, here is some very interesting input from KevinX on fuel (which could be a contributor).. http://www.victoryforums.com/showthread.php?t=11891

And last thought is what have you done with your airbox? Stock with a K&N at least? Have you opened up your airbox at all.

Hope this helps point you in the right direction. As for replacement of plugs, I inspect/replace them every other oil change (7-8K) as my thoughts are if I am pulling them to inspect them, why not keep it at peak performance. Yes, I use NGK and have had no issues. No, I have not played with Iridium.

Hope this helps!:D
 

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Discussion Starter #3
Most of that I knew, the octane thing, only use what is needed, I knew that, I run premium a lot of times just to avoid the ethanol(junk!) I do have one gas station in town that I know of that has 88or 89 no ethanol, but I can't always get to it. And my plugs don't look like any of the pics, which they never do, but mine are darker brown with soot up the ground strap to the bend, then it cleans off, and the porcelain is darker brown, kinda chocolate brown, should be at the darkest, cardboard brown. The one I am not sure about is the letters on the plugs, by the letters/numbers what I am suppose to have by the sticker is CPR6EA-9, which by the ngk link, is 10mm threads, projected tip, resistor, 6 heat range, 3/4" reach, A(special design) -9 which is .036 gap(book says .032) What I have is the same exept the last letter is a B and not the A, the B is a solid tip. What is the special design tip? wondering if its the screw on tip?

I try to avoid NGKs because I have had a ton of trouble with them. And for the intake, it has a K&N air filter and the vented air cleaner cover, other then that I don't know, this is how I bought it. I am curious as what else can be done to the intake though. Thanks for the links!! its appreciated.
 

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Just my two cents and take it for what it's worth but based on what I had and what you just wrote I would go KevinX's recommendation on changing your octane to 89 and run a coupel takes with new plugs and see what you get. My pipes are finally starting to grey out a bit. Have always been sooty as well as what your describing on your plugs. As for the B vs A and the solid tip. Was wondering what SPECIAL is as well. going to have to be someone else to chime in on that one.

I know alot of views on ethanol but my books says you can ingest up to 10% and from what I heard here and another forum as long as your not storing your bike or its sitting long term you should be fine. I can tell you that our temps here are mid 80s to high 90s and I am running 87 and cannot believe the differnce in performance. Maybe if I was in SoCal around elcentro or out in the desert that may be a problem but I know that since it was recommended to change and I did, I've been a happy camper. No better milage cuz that darn right wrist is froggier now.. lol..

Hope some of the info helps, never know what someones knowledge base is so I hope it didnt insult ya.. lol.. Maybe some other readers get some use out of it. I know I have in the past. Keep us posted on your progres..

Tim
 

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Discussion Starter #5
No insult here, I am new here so I am not known at all, these bikes are new to me, I am use to kickstarting my chopper, and it has 4 carbs! I plan to check into the plugs a little more, and I was going to switch to the lower octane today, but not at the station I ended up at, its been hotter here then normal, and humid. And my bike is my summer work car, I ride to work 4-5-6 days a week, 60+ miles a day just to work and back, so the gas generally doesnt sit to long in the tank. Thanks for all your input, hope to get more to add to especially the plugs thing, but what you have added is very helpful!
 

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Tims_04V92TC
You change your plugs every other oil change? Why
Plugs are good for a good 30 thousand miles. Changing them so often doesn't make the bike run better or faster.
Pull you plugs and check you gap I'll bet you'll find it has not changed any.

NGK plugs are great and most all the bikes except harley runs them and its not cause there cheap there just plain good. By the way harley has Champion make a special plug for there bikes.
 

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Discussion Starter #8
I checked today, my dealer doesn't carry the ones with the A at the end, just the B(solid top) and I checked at a couple auto parts stores and there is no cross for them yet. Mine look OK I will need to fill with gas again tomorrow so I will try a lower octane and see what difference it makes.

a couple things, what do you mean handyhoward, by tuning your plugs?

Another, what can be done for the intake, that may be a seperate question all together though.

And, I have had more then my fair share of troubles with NGK plugs, in everything I own, so I try to avoid them. My old bike is a 4 cyl, I have bought 2 seperate sets of NGKs, both times I got one bad one out of the 4 right off the bat. Another time I bought a set of 3 for my snowmobile, within 50 miles one of the 3 was shot. I put champs in both times and no more troubles. My 4 cyl bike idles better, starts quicker, and gets better mileage with champs then with NGKs.
 

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Tims_04V92TC
You change your plugs every other oil change? Why
Your right VJ, and that would save me 26 bucks. To me, if I am going to pull them to inspect them, toss a new set in and let it go for peace of mind if nothing else. Maybe in another 16K I may change my mind but when I got the bike the plugs had 2500 on them from last tune up. By the time they had 6K, I was experiencing some sluggishness in response and rough idle/hard start, pulled the plugs and one was very sooty. Why? Don't know, replaced them both, instant success. So, living off lessons learned, I added it to my scheduled stuff to replace. Maybe it was something else, but I havent found it yet if so. I havent had the best luck with NGK in the past but giving them another run beings VIC put them there and I have learned to trust VIC for the most part... lol...
 
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