Yep its true. They have a huge counter balance to smooth things out.TimNC said:I have read that the 650's 2 cyl's go up and down together or 360 degree rotation. Is this true? If so, do they fire together? I'm somewhat confused with this since this is the first time I have EVER heard of such a thing. :?
Pistons go up and down together (360 degree engine) but still fire alternately. This was a common configuration with British twins as well as lots of the early Japanese twins. This config only requires one set of points or one pickup. It still has one cylinder firing for each turn of the crank so power characteristics are pretty much the same. Rocking couple is eliminated but primary imbalance is increased, smoothed out by the use of dual counter-balancers.TimNC said:Ok. So both pistons run together - fire together - acting as one large single cyl. I'm assuming then that the purpose is torque since hp would suffer in such a setup.
I do not think there is a relationship between power and firing order, power is all about the swept volume and pressures blah blah.........TimNC said:Ok. So both pistons run together - fire together - acting as one large single cyl. I'm assuming then that the purpose is torque since hp would suffer in such a setup.