Hi guys my motorized bike i bought a bunch of upgrades like the bbr thrust exhaust, performance carb with better air filter, new gas tank, new cylinder and cylinder head, and it keeps topping out at around 20mph im new to motorized bikes and just got this like a month ago and only been riding it for about 2 weeks, it accelerates pretty good to about 20mph but then just stays at that speed, i do have some throttle slack but dont think that is the problem, also can anyone tell me how to fix my throttle slack like with some type of spacer or something, and when i go out to my garage like in the morning or something i will see a really small wet spot on the floor so i think my gas is dripping even tho i turn off my fuel