Seriously, I use NGK 7's in most of my stock bikes. You should be able to buy the right plug for your bike at any Chumpion Auto store. NGK's are the best. If you were going to race your scooter you might want to switch to a cooler plug. But, if you do you will likely foul out around town. The NGK 7s are a good compromise for city/high speed driving.
As I have said before, If you have to change your plug often to keep your scooter running well - something else is WRONG. I hardly ever change them even on my GS150 that burns a choking 6%!
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