17"CRF250RALLY Plug replacement
Purchased this plug for CRF250RALLY along with DAYTONA's plug socket for a plugfor replacement.
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13.89 USD (2,215 JPY)
Webike Point: +22 pt
(0.13 USD)
Delivery Information
This item is discontinued.
FITMENT
HONDA
Open Fit Model Information Table
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CRF250L
12-21 MD38/44 12.4- [displacement]250 [number of units required]1
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CBR250R
11- MC41 11.3- [displacement]250 [number of units required]1
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CRF250 RALLY
17-20 MD44 17.2- [displacement]250 [number of units required]1
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CRF250 RALLY ABS
17-20 MD44 17.2- [displacement]250 [number of units required]1
See all
HONDA
Product detail
[Stock Number] 90634
[Shape] Screw type
[Size]
Screw diameter: Φ10.0mm
Screw length: 19.0mm
Hexagon dihedral width: Hex 16.0mm
[NGK part number] SIMR8A9
[Type] Iridium plug
[Heat Value] 8
[Compatibility Information] HONDA Stock Part Number Compatibility: 31916-MEH-003
**Even if you purchase in units of 10 pieces (1 box), it will not be delivered in 1 box.
*Terminals, tightening angle, etc. may differ depending on the model.Please refer to the link for the detailed fitting and installation instructions..
* The image is only for reference. The image shown may differ from the actual product.
Webike has all NGK plugs in stock! .
* The item may be temporarily out of stock due to manufacturer shortages, etc
Stable ignition performance and combustion efficiency at a reasonable price.It brings out the true performance of the engine.
[Features]
1. Improved acceleration
You can feel the difference between this plug and the standard plug by its quick response to the accelerator pedal opening.Changing to Iridium plugs will improve acceleration.
2. Engine power pup
Iridium plugs increase engine performance.You can enjoy a comfortable ride with a strong power on the uphill.
3. Improved ignitability and startability
Iridium plugs have ultra-fine electrodes that ignite quickly and improve the starting performance of the engine.The idling is stable because of less spark variation.
4. Increased fuel efficiency
Iridium plugs have excellent ignitability, so they burn gasoline efficiently.This plug is both economical and environmentally friendly.
As a premium plug for stock engines, an ultra-fine iridium alloy has been adopted for the central electrode to achieve superior ignitability and greatly improved response.The electrode is thin and sparks fly easily, so the energy is large and the ignitability is improved.It maximizes the performance of the engine.In addition, the thermo edge at the tip of the insulator burns off the attached carbon (burnt debris), prevents the ignition performance of the plug from deteriorating, and maintains high performance.
*The effect varies depending on the vehicle.
[About the shape of the plug terminal]
●Select a terminal shape that matches the engine and plug cord installation side.
There are three types of plug terminals: integrated type, separate type, screw type, and punch-and-caulk type.
Mainly, "integral type" and "punch caulking type" are used for four-wheeled vehicles and "screw type" for two-wheeled vehicles, and "separate type" is available for plugs used for both four-wheeled and two-wheeled vehicles.
In addition, the terminal part of the "separate type" can be removed, but the terminal part of the "integrated type" and "punch-and-caulk type" cannot be removed.If you try to remove it forcibly, the terminal part may be broken.
In case of using the "separate type" as the "screw type", remove the terminal nut.
When using the product with the terminal nut attached, make sure that it is not loose, and if it is loose, tighten it lightly with pliers or the like.
| [Features of NGK plug] |
| - This is a super "wide range" plug - |
| The center electrode , The center electrode is a "copper cored" construction with copper sealed to near the tip to allow a large amount of heat to escape quickly. The result is an ultra "wide range" plug that is resistant to burning and smoldering. |
 |
| Comparing the thermal characteristics of plugs with copper cores and plugs without copper cores, the plugs with copper cores have superior thermal characteristics and fouling resistance, and a wider thermal range. |
| ■ Heat value of the plug |
| - High alumina porcelain from New Ceramics is used as the insulator - |
| - Excellent insulation at high temperature and reliable sparking. ・Excellent heat conductivity and prevents seizure. ・High thermal shock resistance (rapid heating and cooling) and excellent mechanical strength. |
| - Strong and airtight in construction - |
| Because the insulator and the main metal fittings are joined by special powder, it is excellent in airtightness and strong in structure. |
| Special Nickel alloy electrodes are used for superior durability. |
 |
| - Corrugations in the insulator ensure good insulation and prevent flashover - |
| During sparking, a high voltage is constantly applied between the terminal and the main unit bracket. High voltages try to leak along the surface of the insulator and flashover is more likely to occur if the required voltage between the spark gaps is high. In order to prevent flashover, insulator corrugations (folds) are provided to increase the insulator surface distance between the terminal and the main fittings to ensure insulation and prevent flashover. |
| What is a flashover... |
| It is a spark between the terminal and the main unit fitting as shown in the image. |
 |
| ■ Flashover |
| ■The advantages of the plug |
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.
MODEL PAGE LINKS
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Fits:HONDA CB250F 14- MC43 14.7- [displacement]250 [number of units required]1, HONDA CB250R 18-21 MC52 18.5- [displacement]250 [number of units required]1, HONDA CB300R , HONDA CBR250R 11- MC41 11.3- [displacement]250 [number of units required]1, HONDA CRF250 RALLY 17-20 MD44 17.2- [displacement]250 [number of units required]1
Jun 23, 2022
Helpful?
Fits:HONDA CB250F 14- MC43 14.7- [displacement]250 [number of units required]1, HONDA CB250R 18-21 MC52 18.5- [displacement]250 [number of units required]1, HONDA CB300R , HONDA CBR250R 11- MC41 11.3- [displacement]250 [number of units required]1, HONDA CRF250 RALLY 17-20 MD44 17.2- [displacement]250 [number of units required]1
Oct 11, 2021
Refreshing ignition with early and regular replacement
I use it on my CRF250rally and change it every 7-8000km.
It is still usable in terms of service life, but since it is a motorcycle that is used for touring, I am not stingy in replacing it.
Because it is a single cylinder, the burden of the plug exchange is small, and I feel that the cost is high.
Somehow, I feel more refreshed by changing it regularly.
Helpful?
Fits:HONDA CB250F 14- MC43 14.7- [displacement]250 [number of units required]1, HONDA CB250R 18-21 MC52 18.5- [displacement]250 [number of units required]1, HONDA CB300R , HONDA CBR250R 11- MC41 11.3- [displacement]250 [number of units required]1, HONDA CRF250 RALLY 17-20 MD44 17.2- [displacement]250 [number of units required]1
Dec 15, 2020
OEM part number of REBEL250 is purchased and installed as it is.
I thought it was a little early, but I replaced it at 10,000 km.
It's not a replacement for a used Plug, so it doesn't feel any different, but it's nice to be able to ride with peace of mind (laughs).
Helpful?
Fits:HONDA CB250F 14- MC43 14.7- [displacement]250 [number of units required]1, HONDA CB250R 18-21 MC52 18.5- [displacement]250 [number of units required]1, HONDA CB300R , HONDA CBR250R 11- MC41 11.3- [displacement]250 [number of units required]1, HONDA CRF250 RALLY 17-20 MD44 17.2- [displacement]250 [number of units required]1
Sep 23, 2019
The service manual for the CRF250L states that it is a 40,000 km replacement
The first one was replaced at 40,000k miles The second one was replaced at 30,000 km
The second run had a lot of high speed driving, so I wonder if the life expectancy was accelerated
The second one was a complete lifespan, and as a symptom, my hand got numb from the strange vibrations caused by the faulty ignition It was
After the replacement, the funny vibrations disappeared and the smooth blowing is restored
Tightening is done with the plug wrench of the on-board tool as described in the Service Manual It was tightened by hand to the specified torque of 16Nm
Helpful?
Fits:HONDA CB250F 14- MC43 14.7- [displacement]250 [number of units required]1, HONDA CB250R 18-21 MC52 18.5- [displacement]250 [number of units required]1, HONDA CB300R , HONDA CBR250R 11- MC41 11.3- [displacement]250 [number of units required]1, HONDA CRF250 RALLY 17-20 MD44 17.2- [displacement]250 [number of units required]1
Jan 17, 2019
I was supposed to receive Iridium plugs, but I received … I received a regular Plug It hurts that I couldn't check it right away for my own reasons after the product arrived, though It was a terrible scam
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