What is the spark plug model for a 110cc underbone motorcycle?
2 Answers
The 100cc underbone motorcycle has various types of spark plugs, with the majority using CR7E or equivalent models. Different brands may have varying model numbers for the same specification, meaning that spark plugs for underbone motorcycles are generally interchangeable. The spark plug is a crucial component of a gasoline engine's ignition system. It introduces high-voltage electricity into the combustion chamber, causing it to jump the electrode gap and generate a spark, thereby igniting the combustible air-fuel mixture in the cylinder. A spark plug mainly consists of a terminal nut, insulator, terminal stud, center electrode, side electrode, and shell. The primary types of spark plugs include: standard spark plugs, projected insulator spark plugs, electrode-type spark plugs, seat-type spark plugs, pole-type spark plugs, and surface-gap spark plugs. Damaged spark plugs may exhibit the following symptoms: difficulty starting, reduced power, excessive exhaust emissions, and increased fuel consumption. When these issues arise, the spark plug should be replaced promptly.
Regarding the spark plug model for the underbone 110, I remember the user manual recommends the NGK CR8HSA model. I've been riding my underbone 110 for three years and replaced it myself last year with this exact brand, which has proven to be stable and reliable. I suggest you first check the old spark plug on your bike or the owner's manual to confirm the thread size and heat range match. Avoid randomly purchasing different models online to prevent poor engine starting or even ignition difficulties. The replacement process is quite simple: use a 16mm wrench to unscrew the old one and gently screw in the new plug, but be careful not to overtighten it to avoid damaging the cylinder. Spark plugs typically last 10,000-20,000 kilometers, and regular inspections can prevent breakdowns. For example, I clean the plug cap every six months to maintain the ignition system more safely. If you're unsure, take a photo and show it to a mechanic to confirm the model.
