Question

Why can't we completely balance a single cylinder engine?

Answer 1

hey ,
any material that you can remove to reduce the reciprocating mass (piston /wrist pin /ring /top half of rod ) will make an improvement in engine performance , maybe not noticeable at lower rpm's but certainly at high rpm's plus it reduces stress on the engine parts . this will affect the balance of the engine but not greatly .
however, it is a fact that it is impossible to balance a single cylinder engine .
the best can be done a compromise.
hope it helps you..........