Honda CT125 Hunter Cub

[Charlie Bravo_imp]

Ferret's right.

There's a video somewhere of a bloke who drained the oil out of his beat CT90 and replaced it with used fryer oil from the local burger joint. The exhaust smelled of french fries but the bike ran just fine. He then hurled the bike off a four-story building and it started right up (though it was obviously unrideable at that point.)

Edit: Here's the video (Honda Cub, not CT90, but you get the idea):
https://m.youtube.com/watch?v=SLjnqkXNWJs

Back in the day, there was a bio fuel available for diesels. I ran five gallons of it mixed with 35 of regular diesel fuel in my boat, and the exhaust smelled like like french fries.