carb jet

Hey everyone, this is my first post so please bear with me here. Alright so let me start by listing what I'm working with: (I underlined the most important stuff) Elevation: Sea level Terrain: All flat other than trails which rarely have hills of more that 6 feet gain in elevation at 40 degree...

I just got my bike kit 2 days ago. I hope im not doing permanent damage to my bike, but i started noticing a few things. -engine is hesitant.. I can be cruising along (maybe 15-20mph) and the engine is running rough, then all the sudden it smoothes out and I immediately feel it...