Hi there.<br /><br />A friend of mine has a New Yamaha 60 4 stroke on my Buster M. It's brand new with injection. Previuosly, he had Suzuki 50 (4 stroke) but changed it on Yamaha to get the higher speed. <br />With Suzuki the top speed was 62 on 6000 prm with 16 pitch stainless prop. <br />Now...