Well guys I can say one thing after getting my TZ broke in and tuned it is a BIG hand full!!! I have it geared at 15CB and 49 spur and when I am rolling along and hit the throttle and count to 1 all 4 tires are ballooning if I can keep the front wheels on the ground. I started with 13 CB and 52 spur breaking it in and taking it easy I had a problem keeping the front wheels on the ground after the first couple of tanks of fuel at half or less throttle. So I geared it up and still think I am going to have to go higher. Need to get it to the track to see what other changes I need to make as it handles totally different with the TZ.