I did a sort of pre-assembly last night with the parts I already have and decided to put the 125cc tank in the JT and stick with stock for the beach runner. It is real easy to do with the JT, I have had one fitted in there before. The CEN top plate requires cutting for a 125 or bigger so I will stick with 75cc in that one. It also means the car wont go as far in the event of a runaway!!