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We ship anywhere in the world, no questions asked!
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Return requests are accepted 60 days after receipt. Click for details!
Our expert staff is ready and eager to assist. Just call us at 1-800-798-0325!
Our expert staff is ready and eager to assist. Just call us at 1-800-798-0325!
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Spark Plugs
Is it time to replace your scooter spark plug? Monster Scooter Parts stocks KYMCO spark plugs, as well as 2 and 4-stroke Baccio, Genuine, and Honda Honda scooter spark plug types from NGK, a world leader in spark plug technology.

For scooterists with an unabated love of classic Euroscooters from back in the Golden Age of Scooterdom, Monster Scooter Parts also offers perfect replacement sparkers for vintage Lambretta and Vespa motor scooter models. When you have spent time and love in the restoration and maintenance of these beautiful 20th century monuments of mechanical engineering, you may as well use the very best spark plugs available.

The scooter spark plug is a vital part of the scooter's operating system, and one that will occasionally need replacement. Our top-quality spark plugs are inexpensive and should be replaced whenever a visual inspection reveals them to be corroded, damaged or worn.

A fresh KYMCO or Honda scooter spark plug might be just the ticket to keep your scooter running at its very best. Please look through our list of scooter spark plug items to find the correct one for your machine. If you do not see just the scooter spark plug that you need, then call or email us with your requirements and we will try and locate one for you. With our global network of scooter parts manufacturers, we can often find that missing 2 or 4-stroke, Honda, KYMCO, or vintage scooter spark plug that you have searched for.

Note: If you are a bit confused about spark plug codes, click here to read NGK's Code Guide in PDF form.
Resistance is not always futile!

To those unfamiliar with scooter spark plug coding, the "R" designation may require a little explanation. When found as the letter immediately before the numeral in a spark plug's alphnumeric code, the letter R identifies the plug as a resistor type.

Although there is no dimensional or spark heat difference between (for example) the NGK C7HSA and the NGK CR7HSA plug, the CR7HSA contains an internal resistor to negate Radio Frequency Interference (RFI). RFI is caused by an electro-magnetic field generated by the spark jumping the gap between electrodes, and it can negatively effect the computer controlled ignition or fuel injection systems on some modern scooters and motorcycles. Some aftermarket ignition modules are especially sensitive to RFI; the most affected seem to be those modules produced by DynaTech.

By using resistor type spark plugs such as the NGK CR7HSA, you can eleminate any RFI troubles. If your scooter doesn't have a computerized module or fuel injection, then either the resistor type or the non-resistor type will work equally well.

How to "read" a scooter spark plug.

The savvy scooterist can tell a lot about the health of their scooter's engine by examining the "business end" of their spark plug. The color and composition of deposits on the electrode and porcelain insulator indicate whether your engine is running as designed, or is in need of repair or adjustment.

It is important to remember however, that these visual indicators will only show the most recent operating conditions. A plug pulled from an engine that has been left idling may not appear the same as a plug pulled from an engine that was last run at maximum speed. In other words; it is best to check your spark plug after first run your scooter's engine under a full throttle, and them immediately stopping the engine and pulling the plug.

A spark plug pulled from an engine that is in good running condition will normally display a light coat of fine tan or light gray residue on the electrode.

Too hot
If your engine is running too hot, your spark plug's insulator tip may show a glossy, melted appearance. Additionally, excessive heat can leave the porcelain insulation around the electrode looking porous. A powdery white coating may be saying that your engine is running hot due to a too lean fuel/oil mix.

Too cold
A scooter engine that labors below optimum running temperature will often cause the spark plug's tip to have heavy deposits of uncombusted fouling.

Bad gas or oil mix
A wet oily black deposit on the spark plug is a clue that there is a problem with the fuel mix, or that there is too rich an oil/gas mixture in a 2-stroke engine. A mix that is too lean may leave a white residue.

Worn out
A spark plug that has given good service, but is at the end of its life cycle will show a wider gap due to natural erosion, as well as increased fine tan or light gray residue.
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