I upgraded my Skyhawk 48cc with the 55cc hop up kit. It's now on a 1957 Schwinn Corvette Cantilever frame. I used RED thread lock on almost every nut and bolt--many nuts and bolts have been upgraded. I installed an upgraded throttle assembly. I totally feel a difference in power. At this time I am running it easy until the engine breaks in. I'll try to get some pictures up soon. Hahahahaa wanna race me?!