How do you make a motor-scooter smoke?

I'm wanting to get a scooter from someone, and I want it to smoke out the exhaust. do I just fill the oil with the gas? what can I do to get that to happen

hellow,
ok ok i have done this to my scooter to it is easy just abit hard to explain u can do it with any engine.
so wat u have to do is get a hose or pipe size: 5-15mm or 1 quater inch and then drill a hole in the muffler the same sixe as the hose or a bit bigger so it fits tight u might wanna seal it with heat prof seal the hole in the muffler should be as close as possible to the engine (better effect will happen). then u need to buy some brake fluid and some how i drilled a hole into the scew on cap of the brake fluid and and seal it with some seal salastic and then wen u start the engine squash the brake fluid bottle and when it reaches the muffler it will smoke alot..

Maybe put some oil in the muffler, instead of the gas?

a small amount of oil or teansmission fluid in the gas tank should make it smoke quite well.......don't use too much or you can hurt the motor.....it shouldn't take no more than about 6 or 8 ounces to do the job......you'll have to experiment a little.....just remember it is easier to add a little more oil if you didn't use enough....... than it is to rebuild the carb if you use too much