>> choosing spark plugs

No matter what anyone tells you, changing the type of plug you are using will not turn your scooter in a road rocket.

There are many differences between plugs. Of the hundreds made by each company there will be only one that properly meets the needs of your scooter. That is the most important thing to remember. The company that made your scooter spent hundreds of hours in testing and research to find the proper type and heat range of plug to meet the needs of your bike under a variety of conditions. There are very few times that you should ever use a plug different from the one recommended. The exception to the rule would be if you have made performance modifications or use your scooter under adverse conditions.

The plug type that your scooter was designed to use may come in 10 or more different heat ranges. It is best to stay with the plug that is recommended but if you routinely drive on the freeway or rev your bike to its limits then you might want to use a colder plug. If you usually use your scooter in residential or resort areas at 1/2 throttle or less, then you might want to consider a hotter plug.

Common Questions:

What about all of the new types of plugs that are out there (slit fire, platinum, etc)?

If the brand you want to try makes a plug of the correct type and heat range then it will fit your bike and won't cause any ill affects. But why spend 4 or 5 times as much for a spark plug that should be changed every 1500 miles or so?

I routinely need to change my plug as it get oily and stops working, should I use a different plug?

Although you could use a hotter plug, it would be better to find the source of the problem instead of covering it up. Things like poor compression, incorrect timing, points that are not adjusted correctly, or a rich mixture can cause your plug to become oily and foul.

I have put a kit and a bigger carb on my scooter but the stock plugs last longer and are easier to find, why can't I keep using them?

If you have a kit on your bike then it is very important to use a colder plug than stock. Performance cylinder kits are much higher compression and run at a much higher temperature than a stock bike. If you don't use a colder plug you risk creating a hot spot on your piston causing its crown to melt and a hole to form.

>> If you have any questions about this or any other topic, please don't hesitate to contact us:206.763.0160 or info@bigpeoplescooters.com