The 18.1-10 not the 10W version I think is the best for the 160. I don't like the 10W on the 160.

I would sya the first thing your should do is get the engine runnign properly and performaning properly then add things like the velocity stack. This will tell you what it does and you can feel the difference.

I think it makes the YS throttle curve even better...but it does sacrifice a couple hundred RPM from the top.


Troy Newman
Team YS