Spark Plugs

[Aditya N Bharadwaj]

Check your spark plug insulator for any damage
Try rotating the spark plug from where the cap is placed on it with your hands
Do this when it is installed on the engine
If it rotates then it is the fault of the spark plug itself
During tightening sometimes the insulator breaks due to pressure

I also faced a similar issue
Hope this helps...

It doesn't rotate. And I wanted to ask, is there a particular torque at which the plug has to be tightened? I had the sound when the plug was overtightened. Loosened it a bit and retightened it with much less torque and the sound was reduced considerably. It's still there though.

[krish2778]

It doesn't rotate. And I wanted to ask, is there a particular torque at which the plug has to be tightened? I had the sound when the plug was overtightened. Loosened it a bit and retightened it with much less torque and the sound was reduced considerably. It's still there though.

Never overtight a spqrkplug. The threads on the head are of aluminium and that on the plugs are of stel..on excess lressure while tighfening the hreads on the head wil get deformed , causing ithe plug to be loose and will cause in compession loss..why take all the hassle. For perfecf tighcness..first set the plug at finger fight position and fhen use the plug wrench to tight it a little more..thats mkre fhan enough.

Cheers
Ride safe
Krishna

[Aditya N Bharadwaj]

Never overtight a spqrkplug. The threads on the head are of aluminium and that on the plugs are of stel..on excess lressure while tighfening the hreads on the head wil get deformed , causing ithe plug to be loose and will cause in compession loss..why take all the hassle. For perfecf tighcness..first set the plug at finger fight position and fhen use the plug wrench to tight it a little more..thats mkre fhan enough.

I assume it was a reply from a phone Anyway, the message is conveyed so thanks! Anyway, while untightening the LH spark plug, I did notice pieces of metal stuck at the thread. The plug thread had taken a beating thanks to the overtightening. I had to frantically try to make sure the pieces don't fall into the combustion chamber. Yet again, it's all the fault of the bajaj servicemen!
There's something written on each spark plug, but I wasn't able to 'decipher' it. What is it? Heat range? Or something else?

[V!RU$]

Just get the same sparkplug from the svc
Codes are different for different brands
And yes they do tell the heat range
Example the factory fitted spark plug in my P150 was
Champion rg4hc
Whereas the same rating spark plug from Bosch is named ur3dc
This should give you a hint....

[krish2778]

I assume it was a reply from a phone Anyway, the message is conveyed so thanks! Anyway, while untightening the LH spark plug, I did notice pieces of metal stuck at the thread. The plug thread had taken a beating thanks to the overtightening. I had to frantically try to make sure the pieces don't fall into the combustion chamber. Yet again, it's all the fault of the bajaj servicemen!
There's something written on each spark plug, but I wasn't able to 'decipher' it. What is it? Heat range? Or something else?

Lol..yes i was giving the reply from phone. Ans so is there any damage to the threads on the head ? do get it checked out if its ok or will it cause any problems.
Coding on the spark plugs are the model number and yes heat range too. But I don't know to decode it.
Senior member will be able to help there.

Cheers
Ride Safe
Krishna

[Aditya N Bharadwaj]

Lol..yes i was giving the reply from phone. Ans so is there any damage to the threads on the head ? do get it checked out if its ok or will it cause any problems.
Coding on the spark plugs are the model number and yes heat range too. But I don't know to decode it.
Senior member will be able to help there.

Cheers
Ride Safe
Krishna

No damage as such, but fine burr-like pieces were found. The thread wasn't cut anywhere.
What's a laser iridium plug? NGK claims it has a lifetime of 100k kms! Is it worth the hype?

[krish2778]

No damage as such, but fine burr-like pieces were found. The thread wasn't cut anywhere.
What's a laser iridium plug? NGK claims it has a lifetime of 100k kms! Is it worth the hype?

Is it worth the hype and price ? I can't say for sure as i haven't used it , but it sure doesn't need any kind of cleaning or adjusting like the conventional stock plugs. These plugs operate at a heat range where they effectively clean themselves , avoiding the problem of claning it at certain intervals. And since they are like that they assist in a greater efficiency in cumbustion,so a slight increase in acc and mileafe can be obtained.nothing substantial ,but just a mere small increase.

Cheers
Ride safe
Krishna

[Natfx7]

It doesn't rotate. And I wanted to ask, is there a particular torque at which the plug has to be tightened? I had the sound when the plug was overtightened. Loosened it a bit and retightened it with much less torque and the sound was reduced considerably. It's still there though.

Try to remember how much torque you have applied when you removed the spark plugs for the 1st time then apply the same amount of torque or pressure turns on the spark plugs. Everyone has different power. If we give to a bodybuilder he would damage the spark plugs as he may feel the spark splugs are loose. This video shows what you have asked Spark Plug Torque Specifications - What can happen if you over tighten or under tighten a Spark Plug - YouTube
I can't able to find such wrench with adjustable torque as shown in the video.

CAUTION: If your bike is still under warranty then don't mess with this , give it to the Bajaj service. Use only the recommended spark plugs in the user manual during warranty period.

[Aditya N Bharadwaj]

CAUTION: If your bike is still under warranty then don't mess with this , give it to the Bajaj service. Use only the recommended spark plugs in the user manual during warranty period.

1. Ironically the overtightening was done at the free service
2. Warranty is still intact.
3. The irritating sound is mysteriously gone.

[Gause Fakki LoveboyRulez]

Ngk g power spark plug for karizma r model 2011

i need to buy a new spark plug so i wanna buy NGK G POWER SPARK PLUG FOR MY KARIZMA but its not available in my nearby area VASHI . i have asked in babloo motors in vashi navi mumbai but he said he have irridium he dont sell G POWER please help me if i can buy G power spark plug by ordering online

[The Monk]

i need to buy a new spark plug so i wanna buy NGK G POWER SPARK PLUG FOR MY KARIZMA but its not available in my nearby area VASHI . i have asked in babloo motors in vashi navi mumbai but he said he have irridium he dont sell G POWER please help me if i can buy G power spark plug by ordering online

Query Approved and Merged

[Sird]

Re: Spark Plugs

Bosch Super 4 or NGK Iridium IX

WHich one is seems good in performance ?

[metaphoric.el]

Re: Spark Plugs

What are the pros and cons of NGK Iridium Spark plugs over the stock ones?
Do they really help? Performance wise & Mileage wise?

[sinnerz2000]

Re: Spark Plugs

I want to replace my UNIS spark plug, according to this site the bosh twin electrode was found to be good for the uni over the iridium ix- http://nexgenbikes.com/site/2011/03/...-normal-stock/
Should I go for the ngk g power or the Bosch twin electrode? I ride about 25-30 km a day. And also the ngk site doesn't show a part number for iridium ix for uni, does that mean its not available for my bike?

Edit- I bought my bike about 2 years ago used at 33.5k, now its 41.5k and I've not changed the plug since I bought it coz my mech said its fine, but what ice noticed is that my bike has a bosh spark(single electrode) plug whereas the company recommended is champion or ngk, so the old owner has installed it, is that why I'm having cold start issues and low engine response?

[sandeepcf]

Re: Spark Plugs

I want to replace my UNIS spark plug, according to this site the bosh twin electrode was found to be good for the uni over the iridium ix- Champion vs Bosch (Twin head / electrode) vs NGK Iridium IX vs Normal (stock) | Nex Gen Bikes
Should I go for the ngk g power or the Bosch twin electrode? I ride about 25-30 km a day. And also the ngk site doesn't show a part number for iridium ix for uni, does that mean its not available for my bike?

2 NGK G-Power spark plugs for the past 45000kms in my unicorn and great going.