Yamaha cross plane crankshaft - Wrist Twisters
 
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post #1 of 18 Old 04-05-2009, 07:07 PM Thread Starter
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Yamaha cross plane crankshaft

I've read about this in three different magazines-how big a deal is it really? To me (novice rider), the mass centralization done by Honda on the CBR1000RR sounds far more noticeable than the this firing order change done by Yamaha, unless the torque gain is REALLY noticeable, even in spite of the extra 18 lbs this thing is now carrying.

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post #2 of 18 Old 04-06-2009, 02:43 AM
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The torque gain is supposed to be a plus and they have a very different sound from what I hear. I've heard em on TV during some of the races but not yet in person. I'd like to hear one in person...Not your typical inline roar anymore now


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post #3 of 18 Old 04-06-2009, 07:50 AM
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Hmmm... Ben Spies is riding the Big Bang Yamaha in World Super Bike. 3 Superpole starts and the season has just begun.

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post #4 of 18 Old 04-07-2009, 08:26 PM
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well, i dunno if that means it's gonna work. lets talk to our politicians about it. with their wisdom...*cough choke*
oh...sorry, i guess it would seem something is working for yammi then!

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post #5 of 18 Old 04-07-2009, 08:38 PM
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I dunno about the R1, I wants me the V-4 Aprillia
http://www.motorcyclenews.com/MCN/Ne...eves-on-track/

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post #6 of 18 Old 04-08-2009, 07:19 PM Thread Starter
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Quote:
Originally Posted by justintyme73 View Post
I dunno about the R1, I wants me the V-4 Aprillia
http://www.motorcyclenews.com/MCN/Ne...eves-on-track/
I always figured the RC51 would be my complement to my 9er because I am looking for something totally different in a sportbike (I-4 vs. V-twin, for example). That is why the new technology of the of R1 was appealing.

The combination of the V-4 and chassis adjustability is really cool...but that exhaust can...I dunno...it's like meeting the most beautiful girl ever and during dinner at the restaurant she starts dropping the n-bomb at other patrons...wow, does that thing stand out.

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post #7 of 18 Old 05-28-2009, 09:18 PM
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Quote:
Originally Posted by Nesty View Post
I always figured the RC51 would be my complement to my 9er because I am looking for something totally different in a sportbike (I-4 vs. V-twin, for example). That is why the new technology of the of R1 was appealing.

The combination of the V-4 and chassis adjustability is really cool...but that exhaust can...I dunno...it's like meeting the most beautiful girl ever and during dinner at the restaurant she starts dropping the n-bomb at other patrons...wow, does that thing stand out.
One word Aftermarket Soon

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post #8 of 18 Old 06-06-2009, 05:08 PM
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Quote:
Originally Posted by McCrimmon View Post
The torque gain is supposed to be a plus and they have a very different sound from what I hear. I've heard em on TV during some of the races but not yet in person. I'd like to hear one in person...Not your typical inline roar anymore now
Heard one running yesterday, with the new crossplane firing order it had a slight sound of a vtwin. What I was most impressed about was the throttle body velosity stacks controlled by a servo that at approx 6500 rpm the velosity stacks raise up about 3/8 of an inch creating more turbulance in the air box.
Still yet the sae hp of the new R1 is well below the ZX10 and the GSXR1000.
Be interesting to see how they do on the track this year.

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post #9 of 18 Old 06-08-2009, 07:27 PM
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Is it safe to assume they got any torsional loading problems sorted ?

Granted, I'm thinking straight-eight here but I imagine that's one reason nobody tried it sooner.

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post #10 of 18 Old 06-08-2009, 07:39 PM
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I like it.

Soundbite:

YouTube - Yamaha R1 2009

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post #11 of 18 Old 06-08-2009, 07:48 PM
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Can someone explain the Crossplane crankshaft to me?

Spoiler:
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post #12 of 18 Old 06-09-2009, 02:33 PM
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The Yamaha 2009 R1 is the first production motorcycle with crossplane crankshaft, pioneered in the moto gp racing. Connecting rods are 90 degrees from the next, a uneven firing order of 270 degrees-180 degrees-90 degrees & 180 degrees. this eliminates inertial internal crankshaft torque. Resulting in allowing the torque to build smoothly for outstanding torque coming out of corners. In other words you can kick ass in the twisties.

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post #13 of 18 Old 06-09-2009, 02:42 PM
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Quote:
Originally Posted by Basspiece919 View Post
Can someone explain the Crossplane crankshaft to me?
they moved the plane over closer to the squidal valve to make it fluctuate smoother... then they put the selector button to make it a 600,750, and 1000...

ya see... the squidal valve controls horsepower output at any given time including when the engine is not running... i have seen some guys that recently had their cross plane and squidal valves reworked and they had a 234 mph ducati monster and a 170-180mph 919... see that is boring it out to the max... now you have to be carefull because excessive squidal will make the sides of your tires extremely slippery and cause you not to be able to lean more than 25 degrees from plumb at any given time unless the bike is on its kick stand....

hope that helped



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post #14 of 18 Old 06-09-2009, 02:43 PM
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Quote:
Originally Posted by BDVMAX View Post
The Yamaha 2009 R1 is the first production motorcycle with crossplane crankshaft, pioneered in the moto gp racing. Connecting rods are 90 degrees from the next, a uneven firing order of 270 degrees-180 degrees-90 degrees & 180 degrees. this eliminates inertial internal crankshaft torque. Resulting in allowing the torque to build smoothly for outstanding torque coming out of corners. In other words you can kick ass in the twisties.
Was that a partial quote from Yamaha or all from your experience working at the dealer either way...I like the added torque

I'd like to ride one sometime...Can I come down and Demo one Bob


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post #15 of 18 Old 06-09-2009, 03:12 PM
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Quote:
Originally Posted by BDVMAX View Post
Still yet the sae hp of the new R1 is well below the ZX10 and the GSXR1000.
Be interesting to see how they do on the track this year.
Hmmm... I hear Ben Spies is doing pretty good on one as a SBK rookie.

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post #16 of 18 Old 06-09-2009, 06:24 PM
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The hp is down compared to all other 1000's. It makes even less than the previous R1 according to Sport RIder. They also said it has the best connection to the throttle and rear tire. The torque is supposed to similar to a V-twin.

Oh yeah and Spies is bitch slapping most of the field :001_smile:

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post #17 of 18 Old 06-09-2009, 06:43 PM Thread Starter
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Quote:
Originally Posted by barton664 View Post
they moved the plane over closer to the squidal valve to make it fluctuate smoother... then they put the selector button to make it a 600,750, and 1000...

ya see... the squidal valve controls horsepower output at any given time including when the engine is not running... i have seen some guys that recently had their cross plane and squidal valves reworked and they had a 234 mph ducati monster and a 170-180mph 919... see that is boring it out to the max... now you have to be carefull because excessive squidal will make the sides of your tires extremely slippery and cause you not to be able to lean more than 25 degrees from plumb at any given time unless the bike is on its kick stand....

hope that helped
That is the single best post you have ever written. I really find it hard to believe, however, that you don't have some sort of blueprint design graphic to accompany it.

25 degrees from plumb-man is that priceless.

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post #18 of 18 Old 06-09-2009, 07:55 PM
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Quote:
Originally Posted by McCrimmon View Post
Was that a partial quote from Yamaha or all from your experience working at the dealer either way...I like the added torque

I'd like to ride one sometime...Can I come down and Demo one Bob
Chris,wish I had one you could demo, we completely sold out all the R1's last week. Words getting around about the completely re-vamped R1 and they are selling fast.

And you know I wouldn't quote anything out of a tech manual!!!!!!!!

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