should have done a search, this topic has only been covered a 1000 times!!
The cub cylinder, by design is a drag race cylinder right out of the box! this means that it will have very little bottom end, a decent mid range, and a top end that will rip your arms off!
Yes you can choke it down and try and make it have more low end, but doesn't that defeat the purpose of having a drag race cylinder??
I would get rid of the cub and have a set of stock cylinders done up for the type of riding you will be doing.
Cheaper in the long run, and will perform a hole lot better!!