plug up your muffler next time
Simple green should be diluted 50/50 when washing anything. If you are going to wash a dirt bike, mix simple green with half water. Then put it in a water bottle and spray it on there.
metal - duhhh.....
A slip on exhaust will give a dirt bike more power. A full exhaust setup will give you even more power than a slip on.
yes
It could be condensation from hot exhaust gases on the cool exhaust pipe.
Opens and closes the intake and exhaust valves.
no
Put a potatoe in the exhaust pipe
that's an opinion , but i'd have to say pro circuit
yes you can but don't put it near the exhaust pipe.
Washing using water as a solvent for the dirt.
this is Justin L Sellers and i AM going to make a dirt bike that runs on water