Spark Plug for your motorcycle
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Spark Plug for Top motorbike brands
The best-selling Spark Plug for motorbikes in our catalogue
(Price per item)
- Manufacturer part number IK22
- Manufacturer DENSO
- EAN number 042511053106
- Spanner Size: 16
- Thread Length [mm]: 19
- Spark Plug: 1 - Earthed Electrode
- Product line: Iridium Power
- Tightening Torque [Nm]: 22
- Diameter [mm]: 14
- Weight [g]: 43
- Country-spec. model: Japan
- DENSO Spark Plug
- Item number IK22
- Manufacturer's suggested retail price £ 15,03
- Our price £ 10,97
- Condition New
(Price per item)
- Manufacturer part number IW24
- Manufacturer DENSO
- EAN number 042511531642
- Spanner Size: 20.6
- Thread Length [mm]: 19
- Spark Plug: 1 - Earthed Electrode
- Product line: Iridium Power
- Tightening Torque [Nm]: 22
- Diameter [mm]: 14
- Weight [g]: 56
- Country-spec. model: Japan
- DENSO Spark Plug
- Item number IW24
- Manufacturer's suggested retail price £ 15,06
- Our price £ 10,99
- Condition New
(Price per item)
- Manufacturer part number W20EPR-U
- Manufacturer DENSO
- EAN number 042511030473
- Spanner Size: 20.6
- Thread Length [mm]: 19
- Spark Plug: 1 - Earthed Electrode
- Product line: Nickel
- Tightening Torque [Nm]: 22
- Diameter [mm]: 14
- Weight [g]: 56
- DENSO Spark Plug
- Item number W20EPR-U
- Manufacturer's suggested retail price £ 3,21
- Our price £ 2,34
- Condition New
(Price per item)
- Manufacturer part number U27FER9
- Manufacturer DENSO
- EAN number 042511412903
- Spanner Size: 16
- Thread Length [mm]: 19
- Spark Plug: 1 - Earthed Electrode
- Product line: Nickel
- Tightening Torque [Nm]: 12
- Diameter [mm]: 10
- Weight [g]: 30
- DENSO Spark Plug
- Item number U27FER9
- Manufacturer's suggested retail price £ 9,82
- Our price £ 7,17
- Condition New
(Price per item)
- Manufacturer part number 3365
- Manufacturer NGK
- EAN number 0087295033654
- Spanner Size: 16 mm
- External Thread [mm]: 10,0
- Thread Length [mm]: 12,7
- Spark Position [mm]: 1,0
- Spark Plug: Fixed SAE connector, Nickel Middle Electrode, 1 - Earthed Electrode, Interference-free, 10 kOhm, with gasket seat
- NGK Spark Plug
- Item number 3365
- Manufacturer's suggested retail price £ 6,55
- Our price £ 4,78
- Condition New
(Price per item)
- Manufacturer part number 2202
- Manufacturer NGK
- EAN number 0087295022023
- Spanner Size: 18 mm
- External Thread [mm]: 12,0
- Thread Length [mm]: 19,0
- Spark Position [mm]: 3,0
- Spark Plug: Unscrewable SAE connector, Iridium Middle Electrode, 1 - Earthed Electrode, interference Suppression 5 kOhm, with gasket seat
- NGK Spark Plug
- Item number 2202
- Manufacturer's suggested retail price £ 18,40
- Our price £ 13,43
- Condition New
(Price per item)
- Manufacturer part number 7421
- Manufacturer NGK
- EAN number 087295174210
- Spanner Size: 19 mm
- External Thread [mm]: 14,0
- Thread Length [mm]: 9,5
- Spark Position [mm]: 1,0
- Spark Plug: Unscrewable SAE connector, Nickel Middle Electrode, 1 - Earthed Electrode, interference Suppression 5 kOhm, with gasket seat
- NGK Spark Plug
- Item number 7421
- Manufacturer's suggested retail price £ 4,61
- Our price £ 3,37
- Condition New
(Price per item)
- Manufacturer part number 7544
- Manufacturer NGK
- EAN number 0087295175446
- Spanner Size: 16 mm
- External Thread [mm]: 10,0
- Thread Length [mm]: 12,7
- Spark Position [mm]: 1,65
- Spark Plug: Connector Type M4, Iridium Middle Electrode, 1 - Earthed Electrode, interference Suppression 5 kOhm, with gasket seat
- NGK Spark Plug
- Item number 7544
- Manufacturer's suggested retail price £ 16,08
- Our price £ 11,74
- Condition New
Motorcycle spark plugs are necessary to produce an electric spark in a combustion chamber. It ignites the air-fuel mixture.
Types of motorcycle spark plugs
By the heat rating:
- From 2 to 6. These elements operate efficiently under low load conditions. They are suitable for riding a bike in winter and for short trips. It is also recommended to install them in vehicles expected to often get stuck in a traffic jam.
- From 7 to 11. Products of this category are used in the summertime, as well as if you are going to use the bike for long trips and for riding at high speeds.
By electrode material:
- Nickel. They are relatively cheap. Their service life is, as a rule, not more than 15,000 – 30,000 km.
- Copper. They are also considered as budget-friendly. They are intended for covering 20,000 – 30,000 km.
- Iridium. They are characterised by high durability. They operate steadily almost in any load conditions. They can last for 60,000 – 70,000 km.
- Platinum. They can well withstand the impact of electric discharges. Their life expectancy is 60,000 – 70,000 km.
- With gold. They are intended mainly for racing bikes. They last for 80,000 – 100,000 km.
Malfunctions: their causes and symptoms
- Wear and tear. It is a natural result of the use of motorcycle spark plugs beyond the rated service period. It causes problems with starting the engine at low temperatures and in high humidity conditions. Fuel consumption is also likely to increase.
- Oiling-up. This happens when valve oil seals aren’t replaced on time. This leads to difficult start and erratic operation of the engine.
- Carbon deposits on electrodes. A cause of the malfunction can be the component with too small insulator. As a result, the engine may fail to start at once and run erratically.
Tips on how to maintain and replace motorcycle spark plugs
- If you don’t have the required skills to work with high voltage wires, it is necessary to have the parts removed and mounted at a repair shop.
- Do not dismantle the components until the engine has completely cool down.
- It is possible to remove dirt from spark plug wells with compressed air. Before doing that, you should put on protective goggles.
- A spark plug wrench of an appropriate size must be used for replacement. While installing, apply the tightening torque specified in the vehicle repair manual.
- It is not advisable to use parts with a heat rating different from the one recommended by the bike manufacturer. It might cause overheating which has an adverse effect on the life expectancy of the components.
- If you notice deposits on electrodes, in most cases, it is better to switch to other fuel brand. Besides, new valve oil seals might also help.
AUTODOC: only high-quality motorcycle parts
If you want to advantageously buy everything necessary for bike repair and maintenance, become a customer of our online shop. AUTODOC often runs money-saving promotions. You’ll be able to buy motorcycle spark plugs, brake discs, air filters and many other things at low prices. If you need any professional assistance when selecting a product, just contact our online support team.