Is there a rule...

Is there a rule that prevents two wheel drive bikes in the grid?

It would be a nice idea, just imagine the possibilities, no more wheelies on getting off the line, much better out of corner traction, much faster corner speed and different implementations would drive factories to madness LOL.

Thinking about it for some time, just look up for a video and found this, awesome piece of project.

https://www.youtube.com/watch?v=-yCQG9pXf_U

It would be even nicer if the bike dinamically loads the front wheel traction (10%, 20%...50%) according to need.

What do you think?

Iowegian said:

I see issues with the front drive.

1. It will bad in turns. Ever driven a 4wd vehicle on pavement went the front end engaged?

2. Making a drivetrain strong enough to handle the power without it being extremely bulky and heavy would be very difficult.

While those 2wd bikes are kind of cool, theirs a reason even after all of these years, they are still a novelty. 1 driven wheel just plain works better.

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1. You mean oversteer, right? In that case the bike could off load the front traction or even turn it off completely.

2. I don't see an issue in this regard coz the front would never drive alone, managing all ponnies. The tire would never support 100% of the traction.

3. There were a reason for winglets never being used, until now.

Iowegian said:

If have have something that biases more torqu to the rear or engages and disengages the front, you need even more bulk and complexity. If you split the torque evenly, you just need a gearbox. Add bias or ability to disengage, you add clutches, solenoids, etc.

I would be curious to drive one of those two wheel drive dirt bikes just to see how the driving dynamics are. In particular, what happens at the front end when you give it full power out of a turn.

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Actually it exists, it's called Christini. It's the same bike of the above video.

Take a look:

https://www.youtube.com/watch?v=ryuc5-O5XH0

I think when you open the gas fully in the mid of the corner the bike tends to oversteer.

About complexity, it's unavoidable. But MotoGP prototypes are just that, engineering challenges.