Algodoo

Der Motor ist ein bischen unstabil ... aber trotzdem gut.

Ja ich weis, ich musste die leistung etwas hochschieben und deshalb auch die zündung negativ verstellen weil der motor sonst wenig leistung hätte.

The wheels are rather small Try stretching them a little and, if you feel like it, try some shaders on the entire body too!
That engine kicks hard indeed, maybe you should underpower it and use WAY SHORTER gears (3rd should be 2nd gear). 4th gear is somewhat useless so that's why i say you should make them shorter

For the smoke I prefer pitch black smoke with high velocity and decreasing alpha (increasing transparency) and very short timeToLive. If you want an example use this one

And an angle control with arrow keys would be nice too! maybe you should add inertiaMultiplier on the motorcycle's body so it is harder to turn.

very good scene anyways! I'm not going to rate right now as you can improve it a lot (unless you want an 8, which you should tell me if you want)

It just wheelies everywhere if you start it in gear 1 and the engine vibrates the whole thing around if you start in another gear.

Yeah, the wheels originally were way bigger but the gears were way too long and i didn't wanted to change the gearbox... Just rate 8 i know i can built better things.

There are actually dirtbikes that have wheels made very tiny, they are called Pit Bikes. I have one of my own, they have very short gears and tiny wheels, its just their style

But I agree, the engine needs to be worked on and why is the camera connected to the front wheel? It's very awkward there, you should attach it to the guy's head or chest to be honest

pitbikes are nice yeah the gears are way too long...