Hay ? Isn't the Honda CB500 motor the same as the Rebel 500 ? Fuel injected ?
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Any modern 500 motor is going to be "Enough" HP. I would think ?
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I was looking at the W800 for a while . Come to find out , its like the parallel twins of old ! Both pistons run up and down together and take turns having power strokes. Well on first glance this might look like a good idea , but it ain't .
What really happens is : When the piston get to the top or bottom ... it STOPS . Then speeds up again . Well , that causes a lot of vibration and when both pistons do it at the same time ... its more than twice as bad !
So , now modern motors use a 270 degree crank so while one piston is stopped the other is at max speed . So as one is beginning to slow for the end of the stroke the other one is needing to speed up from the top or bottom ... works good for both of them . It gives all that energy somewhere to go besides to your butt and handle bar ends !
Well , thats what wrong with the W800 . But , I wonder how the other twins are ???

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So yea , Royal Enfield has figured that 270 degree stuff out and is fuel injected too . They seem to have their gears all lined up as good as any in the world ! Now if they can get on board with loosing the inter-tubes then 48 HP is enough for a 400# machine !!!