2009 Yamaha YZF-R1 engine technology explanation

Yamaha introduces a new engine with the introduction of the 2009 Yamaha YZF-R1.This is the first production bike using inline 4 - crossplane crankshaft engine technology.
http://www.yamaha-motor-europe.com/pr...

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[vrsixer]

nice design but surprised they didn't come up with this earlier it's common sense, much smother bowerband and more control

[idroppedit]

ummm there's the bike called the M1... won a few championships with it... it works... trust me!

[bassistmatt]

the crossplane doesn't develop more peak torque than the flatplane as when all 4 pistons are stopped at tdc/bdc in a flatplane gives the torque due to the slight acceleration of the crank. what the crossplane does is allow the engine to rev up faster. a flatplane fires "bang - bang - bang - bang -" 0-180-360-540-720, crossplane fires "bang - - bang - bangbang-" 0-270-450-540-720. there is a 90deg overlap and a 270deg gap along with two 180 degree strokes through the 720deg firing cycle.

[sitanshu gm]

but all de motogp bikes use cross plane crank.....yamaha was de 1st 2 bring it 2 de market!!!

[AhilMohan]

It doesnt sound anything like a V-twin. More like a V-Four if anything. The latter using similar firing pattern.

[ausirider91]

its just the same principle as 90 degree v twin cylinder

[goutymaygis]

Does the 09 and 10' R1's get their vtwin sound from the newly designed crank shaft? I love the sound, just need some explanation as to why is sounds like this now:) I love it none the less. So much meaner sounding.

[xdux]

love the drums and bike combo. yamaha makes sick drums too! just ask dave weckl.

[xerox2405]

es todo una belleza pero el sonido es muy feo es mejor la del 2007

[Gan805]

brilliant

[shootphotosnotarabs]

someone send this link to suzuki, i can now blame my crash completly on bad crank construction. that is now my excuse!

[V8JOHNNY]

a crossplane crank firing order creates a pulse of power per crank revolution, kind of like a big bang engine but a little softer. the theory is that the tyre polimers have that extra micro second to re-adhere to the track allowing for greater traction. V-twins are a natural big bang engine and are renound for their traction out of a corner