Hey mate, thanks for the quick reply. The nova website has the picture listed with only a .3mm shim

http://www.novarossi.it/files/explod.../N12TS1_RT.pdf

and have been using .4 till the engine has been fully run in ie lost pinch which it now has. would this be a good time to remove the shim and just do the usual richen the needles and work my way back in from there??