Motorcycle Spark Plugs Reviews

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GPZ750R Spark Plugs Clear all

NGK

27 Apr 2024

Standard Plug D8EA 2120

Fits: HONDA CB500F, YAMAHA SEROW225, YAMAHA YFM350X, YAMAHA XZ550D, YAMAHA XZ400/D, YAMAHA XT250T, YAMAHA XT200, YAMAHA XT125, YAMAHA XS400SP, YAMAHA XS400, YAMAHA XS250SP, YAMAHA XS250, YAMAHA XJ400Z-S, YAMAHA XJ400Z-E, YAMAHA XJ400Z, YAMAHA XJ400, YAMAHA TX500, YAMAHA TW200E, YAMAHA SRX250, YAMAHA SR125T

Japanese Webike user

5/5

I am satisfied

It was just as problem free as the previous product I purchased. View detail

NGK

20 Oct 2023

Iridium Plug DR8EIX 4816

Fits: HONDA CB500F, bimota db-1SR, bimota db-1S, bimota db-1, bimota BB1 BIPOST, bimota BB1 SUPER MONO, YAMAHA MAJESTY250 SV, YAMAHA MAJESTY250/ABS, YAMAHA BRONCOST225, YAMAHA SEROW225 WE, YAMAHA SEROW225 WE, YAMAHA SEROW225 W, YAMAHA SEROW225S, YAMAHA SEROW225, YAMAHA SEROW225, YAMAHA YZF1000 THUNDER ACE, YAMAHA YZF1000R, YAMAHA YFM400FWA, YAMAHA YFM350X, YAMAHA YFM350X

Japanese Webike user

5/5

Mobility Outclassing!

Used for Initial Model TW.
So far, it's been a regular Plug.
Replaced with this product and startup changed.
I did
The stability during Idling was also increased.
I think
TW is a single cylinder, so it's a good cosmetic choice.
I think View detail

NGK

29 Jul 2023

Iridium Plug DR8EIX 4816

Japanese Webike user

3/5

error of conformity check

I didn't check the part number I have on it now and placed an order based on the results I got by searching for GN125, and it was non-compliant.
We must not neglect the basics of properly checking what is currently attached. What shall I do with this Plug? View detail

DENSO

07 Jun 2023

Iridium Power Plug IX24

Fits: KAWASAKI KLE400, YAMAHA YF350E(QUAD), HONDA CB500F, YAMAHA YP250/S/A, YAMAHA YZF1000R/THUNDERACE, YAMAHA YFM350R(QUAD), YAMAHA YF400M-FW(QUAD), YAMAHA XZ550D, YAMAHA XZ400/D, YAMAHA XT250T, YAMAHA XT200, YAMAHA XT125, YAMAHA XS400SP, YAMAHA XS250/S, YAMAHA XS250SP, YAMAHA XJ400/D/SP/Z/Z-S/Z-E, YAMAHA WARRIOR YFM350X(QUAD), YAMAHA TW225/E, YAMAHA TW200, YAMAHA TW200E

Japanese Webike user

4/5

Idling!

Idling seems to have stabilized?
It seems as if it does or does not …. View detail

NGK

23 May 2023

Iridium Plug DR8EIX 4816

Japanese Webike user

5/5

Iridium plugs

It is a good product with good spark flight. View detail

NGK

03 Jan 2023

Iridium Plug DR8EIX 4816

Japanese Webike user

4/5

To improve startability

[How is it used?
Used for ESTRELLA on Carburetor model.
We replaced the regular NGKPlug with this one to improve winter starting performance and fuel economy.

How was your experience with it?
With Carburetor model ESTRELLA, the heat value is usually number 9, but this time I put in a Plug with a heat value of 8.
There is a model that uses No. 8 Plug for heat value, and in winter when Cylinder also tends to get cold, No. 8 is easier to burn as it is more difficult for heat to escape, and I added it in the hope that it would have the effect of increasing fuel efficiency and stabilizing idling.
I am not sure if lowering the heat value has led to the desired effect, but the idling has also become less rosy than before, and is more stable even at lower idling speeds.
When the weather gets warmer, I will switch back to standard #9 and see how it goes.

How did it compare to other products?
I replaced it with a regular NGKPlug and the starting performance is excellent because it is brand new. Even in winter, I could start the engine by pulling the Chalk, but after changing to Iridium plugs, the time that the Cell is turning seems to be shorter.

[Points to note]
nothing special

Other items that would be helpful
A plug wrench is required for replacement, so if you do not have one, you will need to purchase a tool. View detail

NGK

28 Dec 2022

Iridium Plug DR8EIX 4816

Japanese Webike user

5/5

nice spark

[How is it used?
I noticed that the same plug had been used for over 10,000 km, so I replaced it. I thought there was no problem before replacing it, but after replacing it, there was a clear difference in the feeling of a nice spark flying DrumstickDrumstick.

Was the one you received as per Image?
I'm afraid to buy it because I heard that in jungle it arrives in an envelope as it is.

Was the installation difficult?
No problem. I have already purchased a Wrench for the Plug and was able to replace it with ease.

How was your experience with it?
I could see the difference just by starting the engine right after the change. I could accel/decel comfortably when running.

[Included Parts:were they on?
None in particular

[Was there anything that disappointed you?
Not particularly

Windshield IRIDIUM seems to have more delicate sparks flying. Generally, it is said to be replaced after 3,000 to 5,000 kilometers, but I thought it would last longer. I thought it would last longer, but after 10,000 km, I could feel that it was getting worn out. View detail

NGK

15 Dec 2022

Iridium Plug DR8EIX 4816

Japanese Webike user

5/5

Tenacity Up

I have always been a tenacious Engineer, but I feel that I have become even more tenacious.
I will wait and see for now. View detail

NGK

07 Nov 2022

Standard Plug D8EA 2120

Japanese Webike user

5/5

NGK is the only choice for Plug

[How is it used?
I bought a CB250RS-Z at a certain Oak Auction, so first of all, I had to replace the plug! So I bought it.

Was the one you received as per Image?
I looked at the Plug that came with the product and saw the same fit for this product, so I purchased it.
It is a very normal Plug.

How was your experience with it?
I have not driven the car yet after the replacement, but of course the fit and installation was fine.
Also, Wrench size was 19mm.
I don't have a 19mm plug wrench! I was in a bit of a hurry, but it was possible to use a regular socket.

【Review】
The first step in the maintenance of a privately sold vehicle is to replace the batteries and plugs.
NGK's products, which are used by OEMs, are good because they are cheap and reliable. View detail

DENSO

23 Oct 2022

Iridium Power Plug IX24

Japanese Webike user

5/5

First DENSO. first Iridium plugs (and then)

It was installed in July 2021 and replaced in August 2022, after 25 days of actual operation and 3,100 km of actual driving.
From the PRO mechanics. Insulators are too white and burnt." I was pointed out to him.
I didn't notice any glitches. ・・・・

We are currently reverting to the OEM specified DR8EA and seeing how it goes.
In comparison with Windshield IRIDIUM and new NORMAL with 3100km of use Not much has changed. It may be that the performance is maintained at the same level as that of a new plug. View detail

NGK

21 Oct 2022

Standard Plug D8EA 2120

Japanese Webike user

5/5

Safe and reliable standard product

This is the best choice when it comes to plugs. For installation, it is recommended to refer to the Manufacturer's website before installation. View detail

NGK

13 Aug 2022

Iridium Plug DR8EIX 4816

Japanese Webike user

5/5

I like that it has a long life span!

I have been using this type of plug for a long time, and I have noticed a slight improvement in fuel economy over the NORMAL type. I have been using this type for a long time, and I think it improves fuel economy a little more than the Normal type.
I drive only on forest roads, so it is about 0.5%. I have always had good gas mileage, so I don't feel it's extreme. It is good that it has a long life! View detail

NGK

11 Jul 2022

Iridium Plug DR8EIX 4816

Japanese Webike user

4/5

Windshield IRIDIUM, a special feeling

I used the Rare METAL Plug, which has a stronger spark, faster fire, and more explosive Image. View detail

NGK

26 May 2022

Iridium Plug DR8EIX 4816

Japanese Webike user

3/5

usually

One Windshield IRIDIUM, so the exchange distance is the same compared to NORMAL.
Ignition itself is better than Normal plug

I think Windshield IRIDIUM is better in terms of cosmetics.

*I bought the wrong one without looking closely. View detail

DENSO

19 Feb 2022

Iridium Power Plug IX24

Japanese Webike user

4/5

Compared with NGKWindshield IRIDIUM

[How is it used?
Model used:FTR223
Traveling:Street riding, Touring
Period of use:About a year or so (Replace after about 5000 to 6000km.)

Was the one you received as per Image?
Image is correct. I'm glad I bought one made by Denso because the construction of each part is excellent.

Was the installation difficult?
If you have a plug wrench, you can do it without any problem as long as you take care of the angle when tightening the plug, but since the FTR is located quite far back in the plug, it is better to remove the plug cap and then air blow to remove any accumulated sand and small stones.
No need to remove the Tank.

How was your experience with it?
As mentioned in the title, when compared to NGK Windshield IRIDIUM, the ignition enhancement Custom (Equipped with Uotani Coil) I think this product was better in terms of starting and torque feeling when I was not using the
The Life of the Plug itself was the same for both.
The price of this product is higher, so if you think that you should spend money on a plug that needs to be replaced, even if it is a custom part, do not choose this product. The price is higher than this product.
I didn't want to use it with the Utani Coil because I didn't want to have any problems with the thin electrodes due to the characteristics of this product.

[Included Parts:were they on?
None

[Was there anything that disappointed you?
None

Point and hang of installation
Anti-seizure agent on the screw part of the Plug (Anti-seeds、CopperCompoundetc.) can be applied to prevent it from becoming a Trouble the next time it is replaced.
I've been doing it that way for more than a decade, and I've never had a problem with the plug burning off.
Also, it's not enough to tighten the plug as hard as you can, so read the product description carefully and do the work. View detail

NGK

25 Nov 2021

Standard Plug D8EA 2120

Japanese Webike user

5/5

Trusted NGK

I use it on my CB750F.
I have a theory that this kind of plug is better than Iridium plugs for Carburetor Vehicles with Large type air-cooled engine.
The reason for this is that I do not feel any dissatisfaction with this Plug in terms of performance.
It is no problem even if it revs high continuously.
In the case of air-cooled EngineCarburetor Vehicles, there are times when the plug needs to be replaced depending on the condition of the fuel system, but at such times, the cost effectiveness of being able to replace the plug with a new one without hesitation is the biggest advantage, isn't it?
As a side note, another little-known advantage is that it is easy to check the degree of burning. (Because I'm presbyopic?)
After that, it's a sense of trust backed up by our long track record. View detail

NGK

28 Oct 2021

Standard Plug D8EA 2120

Japanese Webike user

4/5

NGKPlug

The price is reasonable and I always use it! View detail

NGK

12 Oct 2021

Iridium Plug DR8EIX 4816

Japanese Webike user

4/5

Improved starting performance

[How is it used?
Used it on a SEROW225 that I bought used. The Normal plug is old by the appearance, and when is it changed?
I replaced it with a Windshield IRIDIUM not knowing if I did.
How was your experience with it?
Starting performance is much better. It also has a better low to mid range blow up.
You can see that Torque has also improved.
How did it compare to other products?
I can't compare it to other motorcycles as it was replaced from an old normal plug.
I've replaced the plugs with Iridium plugs so I'm sure it will work.
[Points to note]
nothing special
Other items that would be helpful
Whether there are Included Parts:/ Items that should be purchased together/Opinions and requests to the Manufacturer
nothing special View detail

NGK

17 Aug 2021

Iridium Plug DR8EIX 4816

Japanese Webike user

5/5

Torque up easily

[How is it used?
SEROW250 (‘18~) I used it for the first time. I hadn't even driven the distance, but I wanted to buy a Windshield IRIDIUM
Was the one you received as per Image?
It's the usual familiar Package.
Was the installation difficult?
If you have a plug wrench, replacement is easy!
How was your experience with it?
Torque up is felt at low and mid speed and the engine blows up.
I'm sharper.
[Included Parts:were they on?
Not particularly
[Was there anything that disappointed you?

Other items that would be helpful
Installation points and hang/Availability and clarity of the Instruction Manual/Points to consider/Items to purchase/Opinions and requests to the Manufacturer View detail

DENSO

27 Jul 2021

Iridium Power Plug IX24

Japanese Webike user

5/5

My first DENSO, my first Iridium plugs (Part 2)

I've finally replaced it and have about 160km on it so I'll post my thoughts.

[How is it used?
In recent years, Tandem touring is the main way for elderly couples to relax on a day trip.
On the way down the road and at high speed, about 90% of the time I drive at less than 6,000 rpm, and the only time I rev to high rpm is when I'm getting out of a crowd of cars.
The ignition system has been strengthened with full power + MSA + Nagai Electronics Ultra code.
The PlugGap was expanded from 0.65mm when it arrived to the Uotani specification (about 1.15mm on average).

How was your experience with it?
I am satisfied with the initial performance. I'm looking forward to seeing how long this can be maintained...

How did it compare to other products?
This is a comparison with the BuRiskDR14ZC that was installed just before.
It's been over a year, and I'm comparing the records to my memory when I installed the new BuRisk...

1) Cold starting performance and warm-up time
Both are good (although my vehicle has always required a Starter, even in the summer months).
2) Warm starting performance
This also makes no difference (my vehicle is "Cell One Shot." (It's not possible to do this, but if you agitate the Axel a little, you can start one).
3) Runaway feeling after warm-up
BuRisk has a "Fan!" But in this Windshield IRIDIUM, there was a scene that made me feel like I was completely burnt out. "Van!" Yes
4) Clutch meat feeling at start etc.
Both of them are well connected, but...
Even when I was about to stall, the BuRisk stuck to its task well and I had no worries, but I did have a few close calls with the Windshield IRIDIUM.
5) A sense of puffiness
There was a soft, fluffy rise in BuRisk.
This Windshield IRIDIUM is not that great, but it wipes beautifully with a sheer and even grain.
6) Running low rpm from near Idol
There was no jitteriness in the Idol keep running if both were low GEAR.
Even at 40-50km/h in 5th gear at around 1500-2000rpm, the Axel revs up smoothly, which is the same for both.
With the way I run, the most pleasing characteristic is that I feel good here.
7) Embracing characteristics
"Pan! Pan! accompanied by the flashy After Fire. "Ngh! Gah!" and a vehicle that was emblazoned with...
By strengthening the ignition system and the B-Risk "ParaParaPara..." It was improved to a gentle After Fire and a large embrasure that seemed to pull a thread.
With this Windshield IRIDIUM, it's not quite that bad. "Kark." I'm not complaining about the gentle embrace of the "I'm not complaining".
8) General Comment
My impression is that the DensoIX24 is nowhere near as good as the BuRiskDR14ZC in terms of ignition performance.
However, I felt that the difference between new and degraded is too large for BuRisk.
That's one of the reasons I decided to replace it, so I'll be watching to see how well Iridium Power maintains its performance.
If the performance drops to the point where you can feel it, it is a cheap and reliable OEM designated D (R) Maybe I'll go back to 8EA.
Considering the ignition, durability, quality... and Cost.

[Points to note]
Some people do not recommend Iridium plugs for older cars.
The reason for this seems to be that it is not easy to revive a vehicle with engine or ignition system problems when it is CUBed. View detail