Originally Posted by
masher81
Thank you. That is good to know. I love my JX21. I was thinking I could use the arrow piston and sleeve when it finally wears out.. but keep the JX crank since it is already filled. Anyone else try a combo like this?
Yes I ran the JX crank in my GTR-21 3 port and it made it have more bottom end power. The new GTR-II Plus (3+2 port) engine has more bottom end so the stock crank works fine. But I would imagine that the Ninja crank would give it even more power because it is lightened.