The Honda PCX / Forza / ADV150 / SH Forums

Hello and a pre-thank you for your help.

To keep it simple, which plug will fit the PCX and/or are these the same part? I have been searching all over google for the info. The closest that I can come to is one is sold over seas, and one is for the USA, but hopefully they are the same part.

NGK CPR7EAIX-9 4848

NGK CPR7EAIX-9 9198

Thanks again for your help

this is your spark plug
http://www.amazon.com/gp/product/B001RM ... UTF8&psc=1

this is the gap

Most of the info I found on the CPR7EAIX-9 4848 is from other countries and CPR7EAIX-9 9198 is mostly from the USA.
Specs seems to be close if not exact, but I just want to be sure.
Thank you.... Thank you

homie wrote:this is your spark plug
http://www.amazon.com/gp/product/B001RM ... UTF8&psc=1

Yes, that is the stock/oem plug. I was looking at the iridium plug.
I will check out the specs and see if they match up.

Thanks for your help

So here is what I found.
NGK 3901 CPR7EA-9 Standard Plug
Shell

Thread Size: 10mm
Thread Pitch: 1.0mm
Seat Type: Gasket
Resistor: Yes
Resistor Value: 5K Ohm
Reach: 19mm (3/4")
Hex Size: 5/8" (16mm)
Terminal Type: Threaded Stud
Overall Height: ISO
Gap: .035" (0.9mm)
Center Electrode

Material: Nickel
Type: Standard
Size: 2.5mm
Projection: Projected

NGK 9198 CPR7EAIX-9 IX Iridium Plug
Shell

Thread Size: 10mm
Thread Pitch: 1.0mm
Seat Type: Gasket
Resistor: Yes
Resistor Value: 5K Ohm
Reach: 19mm (3/4")
Hex Size: 5/8" (16mm)
Terminal Type: Threaded Stud
Overall Height: ISO
Gap: .035" (0.9mm)
Center Electrode

Material: Iridium
Type: Fine Wire
Size: 0.6mm
Projection: Projected

We use the iridium's in our super high temperature Harley engines because they run cooler... perhaps not suited for little 150cc water cooled engines. If you experience problems take it back out first and use the OEM recommended plug before looking elsewhere for issues.

Thanks for your help Homie. I puchased the NGK 9198 CPR7EAIX-9 IX Iridium Plug. Looks like it should do the trick, but I will let you know next week.
Still not sure why the last 4 digits would be different. I know that I will get blasted for getting this plug as over kill and not needed, but I just like to do it that way : )

homie wrote:We use the iridium's in our super high temperature Harley engines because they run cooler... perhaps not suited for little 150cc water cooled engines. If you experience problems take it back out first and use the OEM recommended plug before looking elsewhere for issues.

Will do. I will keep my stock one close by, and clean it up just in case I need to throw it back in.

txpcx13 wrote: know that I will get blasted for getting this plug as over kill and not needed, but I just like to do it that way : )

somebody will blast you and me too but do it and let me know if it works fine because I have always wondered why not use those better plugs in my PCX. You know you must not gap those out the box as the tiny iridium tips can break away. They should come pre-gap perfectly, you can check it carefully but it should be good to go.

As long as it does no harm and runs, then it's your choice, but what is wrong with the standard plug? The stock pcx accelerates quite fast from still, gives great efficiency and runs well - I'm now near to 8000 miles and original plug and the bikes starts and runs like a charm. If the ECU manages the engine, what will a different plug give you?

It seems the iridium spark plug gives the owner peace of mind. Just like the expensive gold label motor oils do:)

Tonyx wrote:It seems the iridium spark plug gives the owner peace of mind. Just like the expensive gold label motor oils do:)

maybe on our little scooter engines we don't need premium anything but I assure you oil, plugs and octane CLEARLY play signification rolls in air cooled twin engines LOL.

The ECU is supposed to manage fuel mix, timing, etc, so many mods should be over-ridden without a firmware change - or not?

iceman wrote:The ECU is supposed to manage fuel mix, timing, etc, so many mods should be over-ridden without a firmware change - or not?

Up the mountain down the mountain those ECM's are working hard to keep things tuned, I'm with you people who believe we leave Honda's GY6 engine and its factory specs alone and it will leave us alone.

iceman, the PCX has O2 sensor so it will accommodate the changes and keep up, to a point of the hardware limits(injector mainly).

I went through a full tank of fuel without any problems from the new spark plug. If anything changes in a bad way I will be sure to let you guys know. It's impossible for me to know of any gains or losses because I did all the mods at once (variater/rollers/spark plug). The acceleration is excellent and top speed has increased by 10mph (before 55-60, now 65-70) on the PCX gauge cluster.

txpcx13 wrote:I went through a full tank of fuel without any problems from the new spark plug. If anything changes in a bad way I will be sure to let you guys know. It's impossible for me to know of any gains or losses because I did all the mods at once (variater/rollers/spark plug). The acceleration is excellent and top speed has increased by 10mph (before 55-60, now 65-70) on the PCX gauge cluster.

I would be interested to know, once you are sure, whether you have an increase in acceleration and top-speed **without** a loss of fuel economy.
If you do, I would be interested in doing the same, so would like to know the part names/numbers that you used in place of the stock parts.

Thanks a lot.

EDIT: You have the 2013 and I have the 2015 model. Perhaps your changes / parts would not work on my bike. I did not realize your bike was a different (maybe?) model when I asked. Thanks.

Spark plugs for any model PCX should be the same, 125/150 and 2011-2016. I am in Thailand right now but when I get home I will get the exact part numbers off the box and let you know. My gas mileage is a little lower than before but mostly because of the NCY parts (revs faster and higher, stays in the higher rpm range while going 60mph.
I'm really amazed how quick it is now and I am very sure it's a lot quicker than the stock 2015 I am renting here in Thailand.

homie wrote:

Tonyx wrote:It seems the iridium spark plug gives the owner peace of mind. Just like the expensive gold label motor oils do:)

maybe on our little scooter engines we don't need premium anything but I assure you oil, plugs and octane CLEARLY play signification rolls in air cooled twin engines LOL.

Doesn't in mine