[Mashuri]

Originally Posted by Dezmo

not to hijack a thread here but, what does RPM matter when the balancer is spinning at the same speed?

and why do you think they use the term primary balance? Simpe, because there are secondary forces, and when you throw in a counterbalancer, it adds in its own secondary forces.....despite of what RPM youre at, no engine will ever be 100% vibration free.

Balancer isnt a good name, since they dont really balance anything, just get the vibes down to a tolerable level.

And putting lighter conrods/pistons in your aprilia should be easy, provided you know the math to figure out how much mass to reduce the counterbalancers by....reminds me of an old harley trick, guys would get an 883 sportster, bore out the cyls and put wiseco 1200 pistons in them, and it actually improved the balance because wiseco 1200 pistons are slightly lighter than stock HD 883 slugs.

And what have we learned from all this?
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From now on, every motorcycle should have an inline six.