Get some of the heat shield tape like I said and you wont have body problems anymore. Of top of my head cand remember what they are supposed to be but you want to be how it came out of the box without the extra copper "break in" shim. Also GO engines are shimmed for 30% nitro and warm to hot plugs so there are a few different things that you can do to get the issue worked out. 69er the sizes front 7x19x6 and the rear is 14x25.4x6 And I am pretty shure your mill is new trust me on this break it in with the stock bearings and get it to 2-3 gallons then get a new rod pin and clips and your Ceramics and do it all at once and save your Ceramic bearings the hell of break in thats just what I did with my PTM 5 port and it will probably go till its done without needing taken apart again and my stock bearings are still good. Just to let you know that GO engines use TOP quality bearings from the factory though I am just trying the TKO's for the hell of it, take a look at where they are made on the outer race ITALY. Like i said and this is for anyone any help you need I feel like its my job I will do my best for you phone email what ever.