Honda Spark Plug Fitment Chart
| Manufacturer | Model | Standard Plug | Iridium Plug | Electrode Gap |
| HONDA | @ 125 (NES 125) | NGK CR8EH-9 | 0.8-0.9 MM | |
| HONDA | ANF 125 INNOVA | NGK CPR6EA-9 | 0.9 MM | |
| HONDA | CA 125 REBEL | NGK CR6HSA | NGK CR6HIX | 0.7 MM |
| HONDA | CB 1000 F | NGK DPR9EA-9 | NGK DPR9EIX-9 | 0.9 MM |
Full Answer
What is the best spark plug gap?
The following are the types of spark plugs that you will find on the market:
- Copper-nickel spark plug: This is the standard spark plug. It has a copper center coated in nickel. ...
- Platinum spark plug: It’s the same as the copper-nickel plug, but instead of nickel, it has a platinum coating. ...
- Iridium spark plug: This plug is also very long-lasting. ...
- Silver spark plug: Silver is definitely a better conductor compared to the others. ...
What is the best spark plug for a Harley?
Best Spark Plugs for Harley Davidson – Reviews
- NGK DCPR7EIX – Iridium Spark Plugs for Harley Davidson. NGK is one of the oldest names in spark plugs, and their products are always a safe bet. ...
- E3.36 – E3 Spark Plugs for Harley Davidson Twin Cam 88. ...
- Denso IXU22 – Best Spark Plugs for Harley Davidson Sportster 1200. ...
- Champion 810 – Spark Plugs for Harley Davidson Road King. ...
What is the best gap for spark plugs?
- ACDelco ( check the products here)
- NGK ( check the products here)
- BOSCH ( check the products here)
- AUTOLITE ( check the products here)
- Champion ( check the products here)
- Torch ( check the products here)
- Denso ( check the products here)
What's the correct spark plug gap?
How Do I Gap a Spark Plug? Locate a gap gauge or feeler gauge. Clean the spark plug. If it is new, this shouldn't be an issue; however, if you are checking a spark plug that is currently in the vehicle, it ... Measure the existing gap of the spark plug. ... Make any needed adjustments. ... Check the gap again. ...
What is the spark plug gap on a motorcycle?
between 0.6 and 0.8 mmCleaning the spark plug As a rule, the gap is between 0.6 and 0.8 mm, depending on the motorcycle model. Gaps of up to 1.1 mm are less common.
What is the correct spark plug gap?
For most racing applications, you usually want the plug gap to be between 0.020 and 0.040 of an inch. Most engine builders seem to settle around 0.035 of an inch. Factors such as the type of ignition you run, cylinder heads, fuel and even timing can affect how much gap will work best for you.
Are motorcycle spark plugs pre gapped?
In the motorcycle catalogue, we still publish gap setting for every line, but in most cases the recommended item is manufactured with this gap pre-set, as it contains over 230 unique spark plug part numbers.
How do I know if my spark plug gap is too big?
0:051:17If You're Gapping Spark Plugs This Way, You're Doing It WrongYouTubeStart of suggested clipEnd of suggested clipToday we're gonna talk spark plug gap from your daily driver to a full-blown racing engine sparkMoreToday we're gonna talk spark plug gap from your daily driver to a full-blown racing engine spark plug gap is important but the way that their gift is what I'm gonna show you checking. The gap is
Do NGK Spark plugs need to be gapped?
While most NGK spark plugs are pre-gapped, there are occasions when the gap requires adjustment. Care must be taken to avoid bending or breaking off the fine-wire electrodes. NGK recommends a round wire-style or pin gauge gap tool to measure the gap.
What happens if spark plug gap is wrong?
Incorrectly gapped spark plugs could cause engine misfires. Corroded spark plugs could halt the spark altogether and, again, cause misfires. Broken spark plugs could, you guessed it, cause misfires AND if pieces of the ceramic enter the cylinder, could cause far worse issues down the road.
How do you gap a NGK Spark Plug?
0:272:18Spark Plug Gap - NGK Spark Plugs - Tech Video - YouTubeYouTubeStart of suggested clipEnd of suggested clipTraditionally a coin style gap tool such as this has been a standard tool used to adjust the gap ofMoreTraditionally a coin style gap tool such as this has been a standard tool used to adjust the gap of the spark plug the new precious-metal plugs. We do not advise the use of this tool.
What are the symptoms of bad spark plugs on a motorcycle?
Signs Your Motorcycle Spark Plugs Have Gone BadMisfiring Issues. One of the common signs of bad spark plugs is a misfiring engine. ... Backfiring Issues. ... Flooded Engine. ... Strong Smelling Gas or Gas Spraying Out of the Exhaust. ... Check the Condition of Your Spark Plugs. ... Replace Your Spark Plugs.
Should you check gap on new spark plugs?
The incorrect plug gap for your engine can contribute to a high rate of misfires, loss of power, plug fouling, poor fuel economy and accelerated plug wear. It is always best to check the gap against the manufacturer's specifications.
Does spark plug gap affect timing?
How does spark plug gap affect timing? It won't affect the timing, but it will affect the ability of the spark to ignite the fuel. Modern engines use a very lean fuel mixture and require a wide plug gap to ensure there are sufficient fuel molecules between the electrodes to start combustion.
How do I know if I installed my spark plugs correctly?
What symptoms may indicate my vehicle's spark plugs need replacing?Rattling, pinging or “knock”-like noises. When spark plugs begin to misfire, you may notice unusual noises from the force of the pistons and combustion not working properly. ... Hard vehicle start. ... Reduced performance. ... Poor fuel economy.
What are the common motorcycle spark plug sizes?
Thread diameters of 10mm, 12mm, and 14mm are the most common. In fact, when it comes to motorcycles, it's rare to find any other sizes in use.
How long should a spark plug last?
Motorcycle spark plugs usually last around 16,000 miles, or at least this is when most manufacturer service schedules recommend you change them. Th...
How do you clean motorcycle spark plugs?
Just remove the plug and use a wire brush to gently brush off any deposits on the electrode. Don't use a power tool, by hand is all that's required.
What is spark plug gap?
For Champion spark plugs it is a little less logical and is as listed below: Spark plug gap is where spark plug spark discharge is designed to take place. On a conventional spark plug, it is the area between the center and the ground electrode.
When changing spark plugs, always ensure that the spark plug threaded portion of the shell (from the spark plug
spark plug. If the threaded portion is slightly longer , spark plug indexing washers can be used to obtain the desired spark plug reach.
Why are spark plugs so hard to fire?
Used spark plugs are hard to fire as the gaps are worn out, and insulation properties of the ceramic is compromised by solid combustion deposits and old fuel saturation. This robs available voltage at the spark plug gap, as it "leaks" through the low resistance carbon deposits to the ground, resulting in a weak spark.
Can you pry a spark plug?
The very most important rule when checking or adjusting spark plug gap is, to never pry, apply or exert any force on the spark plug center electrode, or center electrode ceramic insulator. The force should be applied ONLY on the spark plug ground electrode strap moving it closer or further away from the spark plug center electrode.
What are motorcycle spark plugs used for?
Your motorcycle’s spark plugs can be very useful to diagnose running conditions in your engine. You can use the burn color of your plugs and reference the plug color charts below to determine if your engine is running rich or lean. Need new plugs?
What color should a spark plug be?
Good running conditions: If everything is good, the spark plug should have a tan/light brown color. Rich running conditions: If your engine is running too rich, the spark plug will be black and sooty. Lean running conditions: If your engine is running too lean, the spark plug will be white. If the spark plug is black and oily, they are oil fouled.
What is plug chop?
A plug chop is when you check the condition of your spark plugs at different throttle conditions. This can help you track down where you may need to make adjustments if you are rejetting your carbs. To preform a plug chop: Find a road with little to no traffic. Ride for a little while at a constant throttle position.
What is the difference between hotter and cooler spark plugs?
Hotter plugs have longer electrodes and cooler plugs have shorter electrodes. Use this spark plug chart to help determine what needs to be adjusted with your fuel mixture or if you need to get hotter or colder plugs.
Why are my spark plugs white?
White plugs are caused by engine overheating. If you run it too long like this, you can ruin your engine and burn holes through the tops of your pistons. Common causes for white spark plugs include: Too hot a heat range spark plug for your engine. Low octane fuel.
What happens if a spark plug gets too hot?
If you have a plug that gets too hot and fires are the wrong time consistently, it can burn a hole in the top of your piston. If it’s too cold, the plug will get fouled and stop firing. Compare quotes fast and save money!
What happens if your motorcycle is too lean?
Lean running conditions: If your engine is running too lean, the spark plug will be white. If the spark plug is black and oily, they are oil fouled. If your motorcycle does not seem to be running right, take a look at the spark plugs. Whenever you are rejetting or tuning your carburetors, a plug chop can take away a lot of the guess work.
What does it mean when a spark plug gap is too small?
A gap that is too small means that the spark duration will be very quick and the spark will be thin and weak. The consequences of this may be bad starting and high exhaust emission levels.
How much does a spark plug cost for a motorcycle?
As a general rule of thumb, use the sparkplug your manufacturer recommends for your motorcycle (same brand and part number). Unfortunately some spark plugs are very specific to a type of engine and make only for that engine such as the NGK ME8 for $34.23 per sparkplug, compared to the “normal” price of $2-4 per sparkplug.
How to read spark plugs?
There are two different main ways to read a spark plug. #1. The first way is to just unscrew it out of the engine and take a look at the end of it, matching the chart below. #2. The second way is the same as #1 except you go for a really hard high revving ride on the bike, pull over and then unscrew each plug to read them. (Just make sure to use gloves as they will be very hot).
What are the signs of a spark?
Symptoms: Light brown deposits en crusted on the side or center electrodes or both. Derived from oil and/or fuel additives. Excessive amounts may mask the spark, causing misfiring and hesitation during acceleration.
Can you use a hotter spark plug on a motorcycle?
Using a hotter or colder sparkplug can be just the fix to an engine problem. Very basely, if your motorcycle engine is running hot then try using a colder plug, if it is running hot try a colder plug. – NGK BP5ES is hotter than a BP7ES plug. – An overheated plug will be white with brown spots.
What size spark plug socket for motorcycle?
Motorcycle spark plug socket sizes are usually 16mm, 18mm or 20.6mm (21mm will do). Whereas the threads are usually 10mm, 12mm or 14mm. When it comes to motorcycles, access is usually tricky, so my tip is to buy a magnetic spark plug socket like this one.
What are the conditions for spark plugs?
The image of the spark plugs above shows four common conditions that you’ll find your spark plugs in. From left to right the plugs are Normal, Rich, Lean and Very Lean. Full descriptions below.
What is the difference between a regular spark plug and an iridium spark plug?
A regular spark plug uses a copper central electrode whereas an iridium spark plug uses, you guessed it, iridium. The metal in a spark plug has a single purpose: to channel the electrical energy through the spark plug.
How long do spark plugs last?
A typical copper spark plug will last around 20,000 miles and most get changed at a major service (usually around 16,000 miles) but an iridium spark plug will be good for around 50,000 miles and you do see people running them to 100,000 miles with no issues.
Why does my bike have a black spark plug?
If it’s just dark or black the bike could be running too rich. A heavy accumulation of carbon on the nose can cause a leakage path to earth. This can cause misfires and poor engine starting.
What to do when you remove spark plugs?
When you’ve removed your spark plugs, check the condition of the threads in the cylinder head and put a cloth over the cylinder head if you’re going to leave it exposed.
Do you need to touch motorcycle plugs?
However, modern plugs are almost all motorcycle-specific fit and so they come ‘pre-gapped’ and you won’t need to touch them. If you’re running a classic bike, you’ll probably need to set your gap and if your bike’s not running right, a gap tool can help you rule out a potential incorrect gap issue. A torque wrench.