Back when I still lived with my parents, my dad's best friend Ernie, dedided to repair the exhaust on his yamaha 400. The baffles had rusted out, and so had the pipes at the back end.
Ernie decided he could make his own baffles by drilling out lengths of conduit, slid those down the exhaust, and surrounded them with steel wool. He then drilled 2 holes in 2 coffee cans, slid those over the ends of the exhaust, and used hose clamps to secure the whole mess.
I arrived just in time to be voulenteered for the test drive.
It sounded nice and quiet on idle, so I took it for a run up the street and back past the house. We lived on a quiet back country gravel road, so by the time I got near the house I was easily doing 70+ mph. As I approached, I saw my dad and Ernie frantically waving me down :roll: Being a typical teen, I thought they were worried about my speed, so I slowed down, turned around, and drove back sedately.
As soon as I shut it down, they started telling me how they could see flames shooting out 4 feet behind me out the pipes.They thought the bike was about to explode! :lol: :shock:
I looked at the ground to see molten steel wool dripping down from what was left of the patch-job!!
Did I mention Ernie was a newfie? If you dont know what a newfie is, google it for giggles.
So the moral of the story is, while it's a great cleaning tool, keep it away from heat sources of all kinds.
Rick