Yamaha concerned by power deficit

<div class='quotetop'>QUOTE (yamaka46 @ Apr 17 2010, 10:50 PM) <{POST_SNAPBACK}><div class='quotemain'>According to Yamaha (Briggs on Twitter) the excess spinning of the rear meant more apparent miles (to the engine) and hence more fuel usage. Too little rear end traction would also lead to a slower speed out of the last corner and, depending on the location of the trap, a slower top speed.

But did Briggs say the gearing was Taller? if so I guess if wheel spin was the problem then lower final gearing would have made the slippage worse , perhaps running out of fuel is a possibility in the years racing?

<div class='quotetop'>QUOTE (BarryMachine @ Apr 17 2010, 02:38 PM) <{POST_SNAPBACK}><div class='quotemain'>But did Briggs say the gearing was Taller? if so I guess if wheel spin was the problem then lower final gearing would have made the slippage worse , perhaps running out of fuel is a possibility in the years racing?
No, Briggs did not mention the gearing. Gearing theory has only been prominent on this site AFAICT. Neither he or Brivio seemed too bothered by the running out of fuel.

If I cast my mind back I seem to recall Stoner and Hayden running out of fuel at Qatar in 2007. I could be wrong as to which race but memory says 1st 800cc race with 21litres, which would have been Qatar.

<div class='quotetop'>QUOTE (yamaka46 @ Apr 17 2010, 03:56 PM) <{POST_SNAPBACK}><div class='quotemain'>No, Briggs did not mention the gearing. Gearing theory has only been prominent on this site AFAICT.

Julian Ryder wrote on superbike planet that JB and Rossi geared his bike to hang in the slipstream of Casey and had not anticipated being out front alone. Or something to that effect.

<div class='quotetop'>QUOTE (Tom @ Apr 17 2010, 03:08 PM) <{POST_SNAPBACK}><div class='quotemain'>Julian Ryder wrote on superbike planet that JB and Rossi geared his bike to hang in the slipstream of Casey and had not anticipated being out front alone. Or something to that effect.
From Soup, Ryder notes:
<div class='quotetop'>QUOTE <div class='quotemain'>First, Yamaha won with the slowest bike on the grid. However, how the hell could Rossi's bike be the slowest through the trap in the race yet run out of petrol three corners after the flag? Vale and Jorge both said they were spinning far too much and Jerry Burgess intimated that they geared Vale's bike to hang in the slipstream of Casey's Ducati not to run out front on his own. Both reasons are plausible, but Rossi still expressed serious concern about the M1's lack of top end. Before the race, none of the engineers I talked to thought the six-engine rule would have any real effect but is this evidence to the contrary?
A few points.

Intimated is not the same as said.

Spinning (as I already said) causes excess fuel use. Ryder covers himself by saying it could be this or it could also be the gearing, probably because the gearing issue was only "intimated".

WRT engine life and engineers, Ryder is fishing here IMO - no-one I have heard has said that Qatar implies engine longevity issues for the M1.

Time will tell.