MOTOGP » Yamaha screamer will 'never' return

What you saying zydon bro, your not making any sense bro.......??????????????

@Clueless_from_Pluto,

What I'm saying is I rate 990cc just as 'a big 250' gp bike in term of handling. Now with 800cc, it is the closest thing to those 500cc racer.

In that sense, Rossi's 4 titles on 990cc (2-Honda & 2-Yamaha) just as much as Biaggi's 4 titles (3-Aprilia & 1-Honda) on 250cc. But Rossi definitely better than Biaggi on 500cc with a GP title. I still doubt it is much better since Biaggi has wasted it by ignoring the black flag in 1998.

Yamaha has never been so advance as Honda even with their 800cc machine. If Rossi and his fan believe he can win another title, he should find a better bike to do it. Otherwise, he is just another 'Biaggi'...

5 pages of posts and not one person here seems to have read Furusawas paper comparing different crank configurations in 4 cylinder engines. There was a 3 page summary by Julian Ryder on the Soup website around christmas time. It would take too long to go into detail here, but his theory relates to the variation in forces which occur from the reciprocating engine parts as the revs rise. With a conventional 4 cylinder (in line) all 4 pistons accelerate from zero every 180 degrees whereas with the cranks staggered at 90 degree intervals the firing intervals match those of a 90 dgree v4 with a 180 degree crank (Ducati Screamer)i.e. power pulses at 90,270,540 and 720 degrees and only 2 pistons..

...are at zero velocity while two pistons are at max velocity. Furusawas theory is that the lower forces from accelerating the pistons in a staggerred manner improves the throttle connection for the rider and that this explains the improved traction not tyre recovery time which was the old theory. Incidentally the two plane four cylinder crankshaft which Kawasaki copied from Yamaha was in turn copied from Helmut Fath who used one in his own design of engine to win the 1968 500 world sidecar championship. Zydon - you're talking out of your clacker by the way.

Trent wrote "TC folks: At what point will you concede that electronics are ruining the sport?"

At no point will I concede anything of the sort. Your comment translates into two versions - "I'm not happy Rossi isn't winning" and/or "I'm not happy that one make dominated the season" - the two versions are contradictory - when Rossi was winning 80% of the races that's OK, but when it's someone else it's not OK. It's jingoism pure and simple.

Lastly the whole TC thing is a furphy - it wasn't traction control that allowed Stoner to overtake Rossi on the straight at Qatar (07) like he was standing still, it was the extra 25odd HP. Ducati built a better bike - if you could ride it.

Secondly if Ducati's traction control was the be all and end all, Pedrosa wouldn't have vanished off into the distance on the 2 tracks that suited the Honda's particular combination. I think it also needs to be said that Honda and Yamaha undercooked their development last year - complacency pure and simple. I'll be staggered if they do it twice (I'm very sure Yamaha hasn't from what I've seen of the tests); Honda is a question mark, I think they're still lost - they have yet to recover from the hole Jeremy left - they're back where they were in the early 80's era of the oval piston 4stroke - the engineers are leading instead of following.

Lastly the season will be a lot closer this year, it has to because the rules haven't changed and hence we're out of revolutionary mode, and into evolutionary mode. Rossi has the change he wanted so he'll be in the right head space (he needed to feel that something major had changed so the tyre change will work for him). It's very obvious that a lot of people on here don't ride, or if they do it's a scooter or a harley, because no matter how good the technology is, there's no substitute for rider skill - if these bikes were as computer controlled as some of you make out it would have been a one two for Stoner and Capirossi every race - it wasn't. Melandri isn't doing any better yet either.

CA wrote:"JL..What I was getting at is they all run TC in various forms plus many other ideas designed to get an advantage on their opponents."

Umm yeah of course ! They are going there to win..

"All these ideas are rolled into a package where it is becoming harder to remove or limit one area in isolation."
Why on earth would you want to ? There are too many restrictions already.

This also pre-supposes that TC is actually causing a problem - it isn't. If you want closer racing then Honda and Yamaha need to get more HP to the rear wheel without running out of juice (Honda did this in one of the late races - which one was it that Hayden was doing well and then went backwards fast ?

@Anorak, Yamaha has explaining in a great details of their design flaws. I only could concludes from their amusing technical explanations that the bike was designed for a musician rather than for a GP rider.

The only musician in Yamaha camp that I've know is Toseland. Probably, thats explain why he adapt to the bike well compared to Lorenzo. Of course Rossi had to work harder to ensure he was ahead of everyone on Yamaha with his talents and experiences. I guest, sooner or later in the season he will get fed-up with the Yamaha directions.

Wot! A Piano firing order? Lol!

Zydon - somehow your humour is lost in translation. The noise to which Furusawa refers is interference with the throttle connection caused by a change in the balance of forces within the motor which occurs at high revs. What design flaws are you referring to?