So much for 17,500 rpm

www.motorcycledaily.com/01february06_redline.htm

I'm not exactly sure what to make of this.  

Very simple actually; they got caught in a lie.  

ouch. but it is weird to me that they would try something like this...they had to figure that someone would dyno the bike at some point in time...  

I would chalk part of it up to a lack of communication between the engineers and the marketing guys.  Sometimes, they don't get along so well...  

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ouch. but it is weird to me that they would try something like this...they had to figure that someone would dyno the bike at some point in time...

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Well tachs are always off, and your speedo.  That is one thing to look at along with all of this.  If the engine isn't actually going to 17,500 who knows the reason.  It makes peak power somewhere in the 14g's.  That high redline is just to allow overrev.  Whatever.  I really like the way the bike looks in person, and all the technology that is involved with the bike the redline isn't that important to me.  

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Well tachs are always off, and your speedo.  That is one thing to look at along with all of this.  If the engine isn't actually going to 17,500 who knows the reason.  It makes peak power somewhere in the 14g's.  That high redline is just to allow overrev.  Whatever.  I really like the way the bike looks in person, and all the technology that is involved with the bike the redline isn't that important to me.

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If i can remember correctly Mazda got in trouble, about 5 years ago, for claiming their Miata had significantly more horsepower than it actually had.  It was beyond the usual crank vs. rwhp and Mazda had to recall a batch of the Miata's via a class action law suit. It was in my old Car and Driver magazine. In Yamaha's case 17,500 sounds much more impressive than 16,200 and my guess is more than one person bought the R6 based partly on that claim.  If squids are willing to buy bikes for appearence or BNG 1,300 more rpm's are gonna bring them in droves. Shame on Yamaha.  

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Well tachs are always off, and your speedo.  That is one thing to look at along with all of this.  If the engine isn't actually going to 17,500 who knows the reason.  It makes peak power somewhere in the 14g's.  That high redline is just to allow overrev.  Whatever.  I really like the way the bike looks in person, and all the technology that is involved with the bike the redline isn't that important to me.

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Yeah, I kind of agree with you Jet.  More than 1000 rpm off at redline is too much.  I have yet to ride a bike that wouldn't go 500-1000 rpm into the red area of the tach before the limiter kicked in.  And for what it's worth, my 10R redlines at 13k, but I can set the shift light for 13.5....  Why would they allow me to do that?  Unless the tach is off at that speed...

What I'd like to know, is what was the needle indicating when it hit the limiter?  If it stopped at 17,500 rpm, then 16,200 is boarderline for error in my opinion.  But if the needle was pointing at 18,500 or something, then that is unacceptable.

And how many think Yamaha's race ECU will let the motor spin to 17.5 or higher?  


Chris  

Well this is interesting! The article says that Yamaha will stop promoting the false rpm limit, yet the March issue of Sport Rider is still heralding this bike as “spinning at 17,500 revolutions”. They must not have known about this until after the issue was printed. I hope Sport Rider has a follow-up on this in their next issue.  

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Well this is interesting! The article says that Yamaha will stop promoting the false rpm limit, yet the March issue of Sport Rider is still heralding this bike as “spinning at 17,500 revolutions”. They must not have known about this until after the issue was printed. I hope Sport Rider has a follow-up on this in their next issue.

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I don't think this is anything new at all.  When I dynoed my 2001 YZF600R it was off by a little over 1,000 rpms at redline, same thing with my 2003 SV650S.  When sportrider tested an '05 ZX6RR last year they said while the tach showed a redline of 16,500 rpms the motor never reached 15,000 rpms.  I know I've read other mags that have had similar experiences with other bikes.  

Just so everybody knows all manufacturers over rate their redlines, its not just Yamaha.  This dyno graph shows 2004 600's and note that none of them even make it to 15,000 rpm save for the honda.  I am pretty sure all of these bikes had indicated redlines of more than 15,000 rpm so they are all off.  Yamaha just over rated their redline a little too much on the new R6 in my opinion.

Disregard the Ducati I didn't notice it was in there.  

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I don't think this is anything new at all.  When I dynoed my 2001 YZF600R it was off by a little over 1,000 rpms at redline, same thing with my 2003 SV650S.  When sportrider tested an '05 ZX6RR last year they said while the tach showed a redline of 16,500 rpms the motor never reached 15,000 rpms.  I know I've read other mags that have had similar experiences with other bikes.

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