[BRENT in 10-uh-C]

Originally Posted by 31jalopy

but not all engines are counter weighted and yes i know its to counter weight rods and pistons but what experience have you guys found/had? smoother, revs higher?

When I read this topic, the keyword is "needed". Are they "needed"? 'No' is my answer. Are they an advantage? 'Yes'. Is it smoother? 'Can be.' but not always. Does it "rev higher"? Counterweights typically have no affect on how many RPM the engine can rev. The carburetion and induction system generally controls that.