MOTOGP » Stoner keeps 'new set-up' on top

I would say testing and qualifying is different to the race, because Rossi never pressure him (Stoner) in the test and qualy.

Oscar:Love the Britten Bike it is the most beautiful bike I have seen (only pics and film) so sad about the designer/builder/owner,,,,if only

Absolute one off was John Britten. Not only did he build that fantastic bike in his back yard he also built his own house. I don't mean the bricks and morter. He actually cast his own door handles, railings, fittings, everything. All by hand, all from scratch. Genius and sadly missed.

This week i have mostly been doing maths!!!!!!!!!!!!!!!!!!!!!!

Like the debate, Jack/Oscar. It's worth remembering that unicycles also go round corners, and you can come out of a corner still turning and banked over with the front wheel off the ground. You can't lose the front if it's got no forces going through it! Comparisons with cars are potentially misleading because they don't bank, so increased aerodynamic downforce aids cornering without pushing the tyre out sideways. It has however contributed much to ruining F1 by preventing overtaking/slipstreaming in corners through turbulence and consequent loss of downforce on the pursuing car.

Another thing,

While it is true that acceleration loads up the rear and braking loads up the front in rudimentary bikes, race bikes' suspension are designed to counter these effects (nosedive, squat). There is an article in MOto tech magazine about that while discussing suspension data logging. It also has an article by tony foale on motorcycle cornering dynamics, finding the sweet spot. it is quite enlightening.

It also have a review of the 08 R1 which borrowed most of the M1's electronics. The Magnetti Mirelli 4 is really the most advanced electronics providing TC, switchable mapping, anti whellie, individual mapping for each gear, etc. Means that R1 & M1 are beasts run by electronics.

motomito

well said statement. Now its getting clearer what can be done with a bike. The unicycle part is so true . Thanks

LAnski: Countering an effect isn't the same as eliminating it. Reducing weight transfer isn't always a desirable thing. To get the lean angles on slicks race bikes have often had relatively high centres of mass compared with some road bikes and therefore considerable weight transfer. In any case, loading the front under braking is necessary to prevent the front locking and vice versa on acceleration to prevent spinning as Kawasaki have discovered. It's a matter of finding the right compromise for the circuit, type of bike, rider and available tyres.

To clarify further, reducing squat and/or nosedive isn't the same thing as reducing weight transfer itself, only the way it affects the bike's geometry under acceleration and braking, which is significant.

One final example: racing a secondhand TZ250 it was necessary to reduce the spring pre-load from the original set up, to suit the changed rider weight, simply to prevent it wheeling all the time the throttle was opened. It simply squatted a bit more. Not always a bad thing either, you see.