This is the kit I bought.
https://www.amazon.com/gp/product/B00Q8JT9H2/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1
The controller is a KT48ZWSRL-lcd. I get 25mph. I put a KT48ZWSRKTB-SJT02LB controller on it and got 28mph. What do I need to do "buy" to get 30-45 mph?
https://www.amazon.com/gp/product/B00Q8JT9H2/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1
The controller is a KT48ZWSRL-lcd. I get 25mph. I put a KT48ZWSRKTB-SJT02LB controller on it and got 28mph. What do I need to do "buy" to get 30-45 mph?