Spark Plugs

[psr]

Re: Spark Plugs

@psr @Pinaki and others. Please read the spark plug and afr condition from the pics. Spark plug resistance is 6.6kohms. Also please tell why colour is not uniform throughout the porcelain.
Spark Plug: Champion PRZ7HC
Bike: Hero Passion Pro

AFR seems correct...and the plug heat range is also correct, but you seem to be getting a slight amount of oil into combustion chamber...if there is no reduction in oil level after 800 ~1000 Kms then the oil leak is most likely through Valve stem seal . 6.6 K ohm resistance in the plug resister is a bit high. The value should be 4~5 K ohm for good results...may be the plug is slowly developing higher resistance and likely to fail later...better to chose a suitable NGK plug .
Good Luck.

[Biker23]

Re: Spark Plugs

The AFR is optimal ..may be a little lean ..but the noise you are referring to when engine heats up will be due to more Valve clearance ,which needs checking.....Otherwise your engine is in good health judging from the spark plug color.

Thank you sir!
This time I'll get it inspected by different svc centre and 'll get the tappets adjusted.

[deep007]

Re: Spark Plugs


This is splendor plus bike spark plug 2016 model. Is it good setting or not.
It gives 55 mileage.speed under 55 kmph.

[akvg2009]

Re: Spark Plugs

This is splendor plus bike spark plug 2016 model. Is it good setting or not.
It gives 55 mileage.speed under 55 kmph.

If the tip of the plug remains golden colour, it's ok
White colour:bike runs on lean mixture
Black colour: runs on rich mixture

[bencherian]

Re: Spark Plugs

Sparks for Bajaj Avenger

Which is the best sparks for Bajaj Avenger 220 old model in market now ?
I don't want iridium plugs.
Stock or G power ?
Also should I need to change the spark cables ? If so which cable model should I buy ?
Please help

[Mandar_C500]

Re: Spark Plugs

Pls find the attached picture of spark plug for classic 500 converted to carb.
Pls let me know your opinion on it

[MidnightEvil Parth]

Re: Spark Plugs

I am using Bosch Twinhead spark plug for my pulsar Ug4.5. Are there any specific differences from the stock plug if any ? Is it a good idea ?

[sarada06884]

Re: Spark Plugs

Pls find the attached picture of spark plug for classic 500 converted to carb.
Pls let me know your opinion on it

IMHO the engine is rightly tuned as you can see the plug Coke brown in color and not much of carbon although in the first two pics the electrode appears to be blurred

[Motomonster]

Re: Spark Plugs

[MENTION=32286]psr[/MENTION] sir please tell the Condition of my sparkplug.

[psr]

Re: Spark Plugs

@psr sir please tell the Condition of my sparkplug.

How many Kms on ODO ?
The heat range is correct and bike is running slightly lean...but you seem to be getting oil in the chamber..The plug ring shows burnt oil deposits and threads also show wet oily deposit...could be rings or Valve stem failure(if a 4 stroke engine) , depending upon the amount of oil the engine consumes.
2 strokers usually have this deposit due to the 2T they burn in the chamber..

[Motomonster]

Re: Spark Plugs

How many Kms on ODO ?
The heat range is correct and bike is running slightly lean...but you seem to be getting oil in the chamber..The plug ring shows burnt oil deposits and threads also show wet oily deposit...could be rings or Valve stem failure, depending upon the amount of oil the engine consumes.

7500 km on odo. The bike is hornet 160r . Regarding oil on plug ring can it be possible that service centre had applied it. I read that mechanics apply some oil to facilitate easy tightening. TIA sir.

[psr]

Re: Spark Plugs

7500 km on odo. The bike is hornet 160r . Regarding oil on plug ring can it be possible that service centre had applied it. I read that mechanics apply some oil to facilitate easy tightening. TIA sir.

even if oil is applied to facilitate easy threading, it burns off ..the black deposit on the plug ring is what I referred to check for oil in chamber...Check for early morning start with slight smoke...and no smoke afterwards which will confirm valve stem seal leak...what is the oil consumption in 1,000 to 1,500 kms ? if you need topping up at those Kms of use suspect ring leak..if not Valve stem leak is suspect...
Of course the center electrode shows absolutely no serious oil leak in to chamber , which is why I suspect the stem seal leak...best to ask ASC mechanic to check, and raise a service complaint in job card about the same..

[Motomonster]

Re: Spark Plugs

even if oil is applied to facilitate easy threading, it burns off ..the black deposit on the plug ring is what I referred to check for oil in chamber...Check for early morning start with slight smoke...and no smoke afterwards which will confirm valve stem seal leak...what is the oil consumption in 1,000 to 1,500 kms ? if you need topping up at those Kms of use suspect ring leak..if not Valve stem leak is suspect...
Of course the center electrode shows absolutely no serious oil leak in to chamber , which is why I suspect the stem seal leak...best to ask ASC mechanic to check, and raise a service complaint in job card about the same..

No white smoke sir. I will get it checked by Asc. Thanks[emoji4]

[bambernitin]

spark plug for avenger 220 cruise

hello everyone, i need your help.
i have avenger 220 cruise 2016 model and has clocked 20,000 kms. None of the spark plug has been changed yet. this is how they look now .

need to change them,
please suggest which should i go for except ngk iridium.

[MidnightEvil Parth]

Re: Spark Plugs

Going to take my motorcycle's spark plugs out, clean them, put them back, tune my carb and will post pics later for experts to judge the A/F ratio and faults if any.
Edit 1 - Found oil and oil deposits on thread and ring, with center electrode showing no such signs, black sooty deposit, also noticing smoke at early morning start with no issues later. I feel my valve stem seals have failed. I am also noticing oil leak from cylinder head. I need oil topup at 500km this time, surprising. Any experts that would help me into a more detailed study of this ? Thanks.