Stock swingarm length?

[GeneralG]

Curious as to how long the stock swingarm is. I've tried measuring center to center from the front pivot bearings to the rear bearing carrier and come up with a measurement of 18.5" Is this correct? What is the Honda spec'd length?

I just recieved a longer swingarm from another member here and just wanting to make sure it is a +2 and not any shorter. The aftermarket Alba swingarm measures right at 20" from center to center.

Thanks