Algodoo

I is ignition/stop
S to spin and get up to speed
1 2 3 4 for the gears
C to stop the "Clutch"
The cylinder is probably not very powerful so you can just rip it off and use a motor.
You can use it just give me credit, even if it's just the gearbox.
You might be able to get a good car or motorcycle out of this.
Haven't really tested with weighty things though.
If you have got any ideas on how to make the motor itself stronger I would like to hear them.

EDIT:
Did a little testing and the engine is absolutely rubbish
EDIT2: Made the engine a bit stronger, might be able to use it as is for a car or something.