Masao Furusawa (Yamaha) Q&A

Where's the word "DFI" ? ....well, better safe than sorry maybe.

<div class='quotetop'>QUOTE (jazkat @ Aug 5 2008, 09:52 PM) <{POST_SNAPBACK}><div class='quotemain'>...
are you gonna pull me up on DFI for the rest of season?
...
Actually I am gonna pull on Furusawa & PM him..

Insightful article

Theres one thing I don't understand:

Screamer config. .........

its supposed to be too powerful for most to ride .....

why does Rossi run "big bang" surely he ca just set the thing up as screamer config. and he has instant power. ?

If Stoner runs it why don't the others?

<div class='quotetop'>QUOTE (BarryMachine @ Aug 6 2008, 09:35 AM) <{POST_SNAPBACK}><div class='quotemain'>Theres one thing I don't understand:
One?
<div class='quotetop'>QUOTE <div class='quotemain'>Screamer config. .........

its supposed to be too powerful for most to ride .....
news to me. Where have you seen that?
It give less feed back to the rider is what I heard.
<div class='quotetop'>QUOTE <div class='quotemain'>why does Rossi run "big bang" surely he ca just set the thing up as screamer config. and he has instant power. ?
Screamer vs big bang is NOT a setup option. For starters he would need a new crank and new cams. Then it is about everything that feeds the engine that need changes. Ignition and fuel injection. When they got that right they can start with mappings to get driveabilty and finally they must reconfigure the rest of the electronic systems, tc, lc, fuel consumtion program.....

Instant power?
Sounds more like a winter of hard work to me.

<div class='quotetop'>QUOTE <div class='quotemain'>If Stoner runs it why don't the others?
The other ducati riders? I'm sure all the Ducatis use screamer config.
Among rest of the manufacturers we've seen Kawasaki testing it. Maybe it arrives after the summer.
But a key difference between the ducati and the others are the desmo valves. If I got it right the noise from internal resistance in the screamer are higher then the big bang and thereby it gives less feedback. The desmo valve train reduce internal resistance and maybe that's the reason they got the screamer to work so well. Compared to the Yamaha the V4 vs IL4 is also a key difference.

<div class='quotetop'>QUOTE (Babelfish @ Aug 6 2008, 06:05 PM) <{POST_SNAPBACK}><div class='quotemain'>Screamer vs big bang is NOT a setup option. For starters he would need a new crank and new cams.

well I'd call that a setup option on a motogp bike

<div class='quotetop'>QUOTE (Babelfish @ Aug 6 2008, 06:05 PM) <{POST_SNAPBACK}><div class='quotemain'>One?

Too true ....... I guess you can say I don't understand any of the Rossifan Fairytales

<div class='quotetop'>QUOTE (BarryMachine @ Aug 6 2008, 10:10 AM) <{POST_SNAPBACK}><div class='quotemain'>well I'd call that a setup option on a motogp bike
whatevah. To me that's two clicks on the suspension, not compeltely new internals.

<div class='quotetop'>QUOTE (Babelfish @ Aug 6 2008, 06:13 PM) <{POST_SNAPBACK}><div class='quotemain'>whatevah. To me that's two clicks on the suspension, not compeltely new internals.

is that all thats on your road bike ? .... its a bit more complicated than that






<div class='quotetop'>QUOTE (Babelfish @ Aug 6 2008, 06:05 PM) <{POST_SNAPBACK}><div class='quotemain'>news to me. Where have you seen that?
It give less feed back to the rider is what I heard.


You were obviously born yesrerday

http://www.crash.net/motorsport/motogp/rac...ick_doohan.html

http://armchairbikefan.blogspot.com/2008/0...sus-doohan.html

do a search on that newfangled Googly thingo .... even us oldies can use it.

<div class='quotetop'>QUOTE (BarryMachine @ Aug 6 2008, 10:18 AM) <{POST_SNAPBACK}><div class='quotemain'> is that all thats on your road bike ? .... its a bit more complicated than that









You were obviously born yesrerday

http://www.crash.net/motorsport/motogp/rac...ick_doohan.html

http://armchairbikefan.blogspot.com/2008/0...sus-doohan.html

do a search on that newfangled Googly thingo .... even us oldies can use it.

Maybe I was born yeasterday, but even I know that while the screamer configuration is a similarity I also know for fact that a comparison between a stroker, in any configuration with a four stroke packed with electronics is totally irelevant. You could just as well pull in vankel engine or jet for that matter. This pretty basic stuff and makes me wonder when you were born.

If you want to be clever and pull up links, please make it a comparison between four stroke screamer and big bang configurations, not two strokes and some dubious similarities between Stoner and Doohan.

Interesting little read.

<div class='quotetop'>QUOTE (Babelfish @ Aug 6 2008, 07:52 PM) <{POST_SNAPBACK}><div class='quotemain'>I also know for fact that a comparison between a stroker, in any configuration with a four stroke packed with electronics is totally irelevant.

Nice bit of ........ there ... care to elaborate ...... I think this could be one of those ...... fairytales coming up

<div class='quotetop'>QUOTE (BarryMachine @ Aug 6 2008, 04:44 PM) <{POST_SNAPBACK}><div class='quotemain'>Nice bit of ........ there ... care to elaborate ...... I think this could be one of those ...... fairytales coming up

No I would not care to elaborate. If you are too stupid to see the enormous difference, I'm not going to try teaching the difference between two and four stroke or what electronics does now compared to then.

Instead, why don't you come up with a link that suggest the screamer 4-stroke are to powerfull too handle?
And while you're at it, drop those links that says the big bang give better drivability and feel. That we allready know.

<div class='quotetop'>QUOTE (BarryMachine @ Aug 6 2008, 08:35 AM) <{POST_SNAPBACK}><div class='quotemain'>Theres one thing I don't understand:

Screamer config. .........

its supposed to be too powerful for most to ride .....

why does Rossi run "big bang" surely he ca just set the thing up as screamer config. and he has instant power. ?

If Stoner runs it why don't the others?
Masao Furasawa explained his opinion on big bang versus screamer engines for the yamaha here.

Stoner runs with it because the desmo Ducati is designed to run in a screamer config, ie all four Duke riders run with this engine configuration.

Kawasaki made lots of trialing (link) a screamer engine, but it has not made its way into a race as yet AFAIK. This inability to make the Kwak screamer work to the extent that they'd try it in a race scenario implies to me that Furusawa is correct.

again ...... my question was on power ........ yes I know that generally when power is increased there are usually tradeoffs in other areas ..... historically holistic bike handling ........ but still ..... even Doohan re-took it up as an option. Seems Yamaha are pressing on with unknown possibles over a known ( but not liked ) possible ........ not sure it makes much sense to me. I guess I still find the whole thing a bit in the realms of fairytales ........ after all ...... the one measure by which say Rossi and Yamaha are judging their "need" on is the "oddity" in the Ducati fold ......... if we based the Yamahas "need" on the remaining three Ducati riders perfomances ......... Yamaha my decide what they need is a few months in the Bahamas ......

<div class='quotetop'>QUOTE (Babelfish @ Aug 7 2008, 01:08 AM) <{POST_SNAPBACK}><div class='quotemain'>Instead, why don't you come up with a link that suggest the screamer 4-stroke are to powerfull too handle?

I know you don't read english Babel ..... but I think you need to find a better translator of those articles ......


Mind you sometimes I think too much of the real articles are so easily ignored by the Rossifans as they do not fit the predetermined fairytale. ...... so who knows.

<div class='quotetop'>QUOTE (BarryMachine @ Aug 6 2008, 11:53 PM) <{POST_SNAPBACK}><div class='quotemain'>again ...... my question was on power ........ yes I know that generally when power is increased there are usually tradeoffs in other areas ..... historically holistic bike handling ........ but still ..... even Doohan re-took it up as an option. Seems Yamaha are pressing on with unknown possibles over a known ( but not liked ) possible ........ not sure it makes much sense to me. I guess I still find the whole thing a bit in the realms of fairytales ........ after all ...... the one measure by which say Rossi and Yamaha are judging their "need" on is the "oddity" in the Ducati fold ......... if we based the Yamahas "need" on the remaining three Ducati riders perfomances ......... Yamaha my decide what they need is a few months in the Bahamas ......
Barry, have you been trialling kngadrok's drugs?

Couldn't make head nor tail of that.

Were you agreeing or disagreeing with what I posted (via Furusawa's comments)?

<div class='quotetop'>QUOTE (yamaka46 @ Aug 7 2008, 09:03 AM) <{POST_SNAPBACK}><div class='quotemain'>Barry, have you been trialling kngadrok's drugs?

Couldn't make head nor tail of that.

Were you agreeing or disagreeing with what I posted (via Furusawa's comments)?

You posted comments based on Furusawa's article ....... Furusawa is historically opposed to Screamer config . ( we went through all that last year ) ..... his main reasons are balance and pulsing in the power train .... and the effect od these on the controllability for the rider ........well yes fine bit if you want power you have to get used too that ......... ( another anomaly ..... why do folk want the 990's back and yet accept big bang 800's? ..... seems "fruity to me ).

Yes Big bang is nicer power deliver ...... as would an electric shopping cart be ...... but when it comes to needing more power ..... they may need to trade off a bit of the smoothness Rossi requires. Maybe thats the whole problem? Rossi who can perform on a bike at a very pinacle of refinment, is up against a guy who seems to be revelling in the rawness of a bike. In which case it will come down to two opposing riders in two opposing tecnical camps going at it to see who wins ....... sounds like Motogp to me.


I think in the end Rossi has set Yamaha a very hard task ..... to give him more power .... but with ease of use.