In mine Champion PRZ7HC, Mico UR4AC & NGK CR7HSA is mentioned. and as far as Sibun told, R means resistor. So this case your NGK is also a resistor one, and your plug is resistor too.
huh! something is going crazy here. Need to find if my bike has came with resistor or non-resistor cap. coz 3-4 years ago my stock cap got break then my mechanic given me which was i'm still running now (resistor). And i don't know exactly if my stock cap was resistor or non-resistor. More likely to be a non-resistor but i'm not sure about this.

Good of you to learn through your experiments and share the same here.. Regarding resistor-less spark,What you found is true ...the voltage at the plug end increase with decreasing resistor. that said it is neccessary to have at least one 4~5 K ohms to ensure that the RFI radiation is kept minimum...This resistor also helps in guarding the CDI,.. IF the Plug gets shorted and excess power is drained to ground...In my Lancer the Ignition cable and the Spark plug both had resistor, and I had started using Resistor less spark plug..My FE and power had increased...I am using my Car like this without any problems for nearly 15,000 kms...
So in my opinion it is enough if you have One 4~5 K resistor in line of the Ignition system.

The Hero Honda setup is rather confusing and not necessary.....My Lancer car had a resistor in Plug ,... and the ignition cable is also the magnetic resistive type...each having a resistance of about 4~5 K ohms...I had removed the resistor plugs and installed non resistor type..I am having Better FE and power..
Similarly when I bought the ZMA, I found the Plug Cap and Plug both have 4~5 K Ohm resistor.....since non resistor type plug or plug cap was not available, I opened the plug cap , and removed the resistor.Now I have a direct connection in Plug cap,so that the only resistance is, in the Plug.Again FE and Power is more with less cold start problem.
Initially there were no Plugs with resistor inside them, hence resistor used in the Plug caps ...later when the resistive cable and Plugs came on the scene, people simply did not try to use only one resistor in line...I guess it is a question of double protection...if the customer uses a non resistor plug also the system will have attenuated RFI with the Resistor in Plug cap...

Here is a very useful link to know about Splendor Ignition system timing, and Voltage

@PSR Sir & Pinaki Sir,
My bike has the red plug, I have no clue what its significance is, I also remember reading in the brochure that the new 2011 ZMA's come with red plugs, but they didnt mention anything about its performance aspect. It would be really appreciated if you could provide a guide on removing the resistor from stock plug. Thanks in dvance, ride safe.

you mean the Plug cap ? then yes 2011 onwards the plug cap had been changed to Silicone Red colored cap. Regarding removal of resistance I do not think it is possible ...Try to get an old Two stroke engine's plug cap without resistor....or any plug cap which will serve the purpose ,without the resistor...

How to know if the cap is resistor free? Any specific model or make I should look out for?

Red stands for D.C cdi ,Black for A.C cdi and olden contact point. Removing resistor is not possible with out damaging the plug.Go to ordinary(not asc) spare parts shop and ask for non resistor plug cap.

thanks a lot psr ji for clearing my doubt!

@all
As far as what we've discussed right now have cleared all my doubts about ignition spark.
I've gone through every post from the beginning in this regard, and i've to say what psr ji have said 'Champion plug are not so good' is true because we've have got now the reading of 4 champion plugs and all of them are showing the abnormal resistance values which are more than a double.
shoeb's champion showed 11.4k Ω
pinaki jee - champion 7.5k Ω
My & my friends champion 21k & 10k ohms.

So, if resistance values differs than what will happen if these champion plugs installed in an engine with 2-3-4 cylinders? Then the spark on all the cylinder's will also differ, hence, then 'misfire' ...as said by psr ji.

Also as psr ji had said preferred value is between 4~5k ohms ... if you look to my Mico UR4AC value it was 5k ohms, tested with analog meter which are more accurate than those Chinese digital multimeter, where's pinaki ji's NGK showed 4.5k ohms, so both of these plugs are between 4~5k ohms as recommended. Our caps are also between 4~5k ohms.

So those values on champion plugs are very high which was ultimately reducing our engine performance from so many days or years.
Few years ago, when I was using Mico UR4AC i was getting better mileage. But when i shifted to champion, my FE dramatically reduced, but i was numb that time, i thought was only a spark plug, instead of suspecting my plug i was trying to diagnose my problem in something else.

After so much time, now this thing has been cleared to me..just because of pinaki ji.

Still want to ask psr ji one thing, which brand plug do u recommend for the engine which burns engine oil? A resistor or non-resistor type? Why?

You cannot remove the resistor but u check the resistance value using multimeter. It should be between 4~5k ohms. If u want to buy non-resistor type, then go for SWISS.

Dear Watson ! You have opened my eyes.
Yes,I can also imagine the kind of rough and uneven idle on a 4-cyl.

One more question that needs to be answered is "How can a plug be manufactured with so much inconsistency ?" Are the plugs which we are getting are actually fakes ?
Other thing to note is - I got Champion plug from a sealed hero package,I think Pinaki must have also brought the same,ditto with your friend too. Which show very roughly around 10K ohms
But you bought the plug in federal mogul's packing which shows double the reading. Pinaki and paul(your friend's plug) Please confirm whether you got it in hero packing or in federal's packing.

I have a non resistor plug and cap of same heat range. Let me it try first.

See i told you that your plug cap is defective and if you would have listened to me then there would not have been any necessity of checking the whole wiring. Also no need to thank me as i helped a friend and in friendship there is no place for thanks and sorry. Everything is good in friendship.
Regarding the resistance and non resistance plug difference, i will post at the end of this post.
You said it and i got the rose. Use OE plug cap as the local cap will run good in dry and once gets wet will give severe misfiring.
Yes there is lot of improvement in ignition when we switch to non resistor plug which i will cover at the end of this post.

Even though plug is non resistor the resistance of multimeter probe and the conductors in plug itself will show some resistance. Any path that electric current passes will show some resistance because of repeated excitation and collision of electrons in the conductors.

Thanks for the gold medal but do not make me sit on such high pedestal. I am still learning and teaching others. This is a constant process of sending and receiving knowledge.
What is the use of my knowledge if i do not help others. Only by sharing with each other we can gain more than by single effort. This is the basic thing that todays generation lacks. Nobody shares knowledge with anybody may be due to their ego as a result the they do not know anything except book. My belief is that only by sharing that you can gain knowledge. Book knowledge is only helpful for academic success and for success in anything about life only discussion is the best way.
And what about DID timing chain and sprocket kit. If you want then i can send you. New stock has arrived.If you want then call me.
And regarding part number for ring then here it is:-
13011-198-771 -- piston ring(std)
13012-198-771 -- piston ring(0.25)- first oversize
13013-198-771 -- piston ring(0.5)- second oversize
13014-198-771 -- piston ring(0.75)- third oversize
13015-198-771 -- piston ring(1.0)- fourth oversize.
This part number is for JOY, DAWN and CD DAWN(old model)

Sir, as usual you are correct but in this case i am saying you are partially correct. The case that you are referring to was the case when champion was owned by MODI but after federal mogul took over champion it is one of the best in markets. But every plug doesn't work in all bikes.
For example in my joy what happens is that champion and mico runs fine but if NGK is fit then immediately mis firing starts and bike doesn't feel free to rev. It happens on new plug and if you fit mico or champion then everything is normal. But the same NGK will run ggod on my sis pleasure and fathers splendor.
So some bikes have a bit of customize preference which varies with all bikes. But believe me i have experimented a lot and after federal mogul took over champion plug quality has improved dramatically.

Thanks for asking about me. I am fine and presently enjoying my life as an officer of STATE BANK OF INDIA. I am posted at a slight rural place which is about 170 km from bhubaneswar. The upside is that it gives me a chance to ride my extreme on week ends when i return to bhubaneswar and again return to work on mondays. The NH5 and the state highways are excellent. The state highway passes through jungles and small mountains which gives pleasure in riding. I have fit unicorn front sprocket(15T) in my extreme and bike flies on the national highway. I touch 100 kph at only 7200 rpm and bike feels as if it is walking and highest i have touched is 115 at 8200 rpm and i had still throttle left and bike was shy of redline by 800 rpm. And the new extreme(my model digi speedo) has damn accurate speedo as i have tested through gps and the speedo is bang accurate which should be because it shares its sensor and wheel with ZMR.
Review of extreme will be up after lunch break.
Also i am buying a laptop today and so will remain in touch with you all everyday. I visit xbhp daily on my phone but couldn't reply as my phone doesn't support replying. Now i will everyday remain in touch.
Now some photos for you all of my every week trip on my extreme to my work place:-

The beautiful state highway:


Hill by the side of state highway:-


Extreme on the state highway:-




The point at which the state highway meets the national highway:-


The deserted national highway:-

When a spark plug is changed and a new make is tried then the heat range, Plug gap, and thread and tip length have to be correct to get the best out of them..Whenever I change the spark plug in the vehicles owned by me, I always cross check the
1. Plug thread pitch,and length
2. Plug electrode type
3. Electrode projection into the combustion chamber
4. HEAT RANGE.
5. Type of plug ie., "R" type or plain
6. check and set the spark plug gap to spec.
I am not alone in my observation of Champion plugs failure......World wide people are switching to NGK for some time now, from aviation to tractor to lawn mowers,...any where Internal combustion engine is used....the rate of failure is high and is ,for me unacceptable....For instance in my brother's Santro, I had changed the Plugs from Champion to Denso,since he was complaining of lack of power,Poor FE(7Kms per liter) and bad cold starts...Hyundai was unable to solve this problem even after 6 months of repeated attempt...With Denso Plugs all of the problems vanished and FE increased to 11 Kms in city with A/C...The Santro went for service again after 8 K kms of this, and soon, all the problems returned...needless to say New Champion plugs were replaced in place of Denso...The dealer was asked to return the Denso plug and were re-fitted..till now after another 5 K Kms the Santro is going good....
So my observation is not just ONE Engine specific but after Knowing the problem in many engines fitted with Champion plug....
I had shared my observation out of my personal experience,
Good Luck to all.

Here is a useful link ....

Whoa! There is huge information flow in this thread. Of course, when all the GIANTS are here, it should be.

As per PSR sir's advice, I wanted to try a plug without resister. I have tried RX135 plug cap (my mechanics suggestion) for my ZMA. The plug neatly fits the plug, but the plug cap size is smaller compared to the stock ZMA's. Due to this the plug cap is touching the walls of the head. Here is a pic of the two plugs. The left one is RX135 and the right one is ZMA. Notice both design and size difference. My mechanic said no other plug from two-strokes would fit.

I am merely trying to share what I had been learning through experience....
Did you try the Pulsar Cap...some come with 1K resistor, and some without it....

Actually you are right. I am afraid i think i tried to prove you wrong. But i had no problems with champion plug in my joy. On the reverse my joy always showed problems with NGK plugs that too the recommended one- CR7HSA.
I do not have experience with plugs in cars and so i cannot comment. But the fact is that i never had problems with champion in my bikes. But the best plug for splendor series is MICO U4A.
Even better than MICO is BOSCH SUPER but BOSCH SUPER is resistor and MICO comes without resistor.
It is a common problem that as the plug ages the resistance increases and this is the reason that manufactures world over recommend replacement of plug after regular interval.

@all-

Resistor or not what the misnomer:-

As there has been a lot of debate on the type of plugs and why there are two resistors in the plug, i will try to clear the doubt:-

Actually in plug caps the resistor is there for minimizing radio interference but in plug the resistance is there because of the reason of prolonging plug life. It is because due to excess voltage and arching the electrode will wear out and require replacement and regular adjustment of gap is necessary.
So manufactures world over found an easy way to the problem is to introduce resistor and decrease the voltage.i will update more in night as presently i am going to buy my laptop as the order has arrived and my dealer has called me. You know i have some contacts regarding anything in bhubaneswar. So i can buy anything even i do not have a single rupee in my pocket.

LOL,What is the make,model and price ? 3rd gen Core i3/i5/i7 or AMD ?

Difference noted between resistor type (plug & cap) and non resistor type.
1. Change in the characteristic sound at 7-8k Rpm. Earlier it used to make a pleasing grrr ound and now it is more like a turbo sucking in air
2.The small time required for the idle to settle just after the kick start has reduced.
3. Perceptible change in top-end performance.(Can only confirm tomorrow after a long ride,could also be due to low temperature as it was drizzling at the time of testing)
4.FE- Can only be confirmed tomorrow.
5.Carburetor needs more fine tuning / out of adjustment.
6.No perceptible change under low load/low RPM,all the difference is just in top end.

I and my friend's plug both of them bought from outside at the same shop in federal mogul packing.