My Tomos Bullet (1990) was having trouble idling, and was getting super hot, then not starting up after I would ride it for a while. After a good carb cleaning, and some advice from a local scooter repair guy, its idling better and running smooth, however, it still gets very hot very fast, and then starts shutting down when I stop at a light (after maybe 20 minutes of full throttle city riding. It's better when its cooler outside or raining. The scooter repair guy says that the engine is running too hot and I should get a cooler spark plug. My question:
1. Is he right? I had a Bosch w8ac before, and he gave me a NGK B7HS, which works as well, but he says a higher number is a cooler plug.
2. Where do I find a cooler plug/how do I know it fits?
3. Is there anything else I can do to cool down my engine?
thanks in advance,