let me know how you get on with the throttle bodies,we are running 16.5 front and no we aint touched the mota,we think the power will be good as standard and tuning may be good on fast tracks,but short tight tracks are what we mostly use in uk,i know you have some fast tracks in ireland,but try racing around the three sisters circuit in uk in the wet and a 450 would be tough to beat,thats why we will just run the 570....60 bhp standard mota.keep in touch m8 with any changes you make,have you had to make ,any mods to the slipper clutch, ours is not working properly at the mo , let me know and good luck dude. is McKee still racing,we know him and the farmer boys.