Has anyone ran the tb cam and sprocket kit in the lifan 120 head? If so, what do you think about it? Just curious to see. I know most people will say run the z40 but I am looking for something that will help it rev once I get it to 145cc but still have plenty of bottom end. This 10 year old needs it in his little quad and his dad wants plenty of power out of corners but a decent top end too. Plans are PE24, tb cam and sprocket, 145cc kit from tbolt, and my backyard port job.