Well that was kind of the arguement.... One person says that weigh is a factor because:
"Less weight equals more acceleration, slower fuel consumption and longer tire life."
Another person said (about Dani Pedrosa):
"someone REALLY believes than in MOTOGP is better less weight ??? In 125, maybe, but in such powerful bikes you need to place your weight in correct place every time....he can not get his tyres on proper temperature, because of his lack of weight ... you know, less weight , less traction.....less temperature...." And then goes on to say Dani is just a better rider.
And yet another person said:
"the 125/1000 doesn't matter much coming into turns. but on straightaways ur weight makes a lot of sense. "
I was just reading the debate on how weight affects different things...it was interesting.