can anyone tell where is the best place to take my 'storm for a tune up, in the manchester area ?.....i always prefer to do the work myself ( job done properly....etc ) but i cant stretch to buying my own dyno

i bought the bike second hand, its fitted with non original viper cans ( that sound great ! ) and a k+n filter - and with a couple of track days coming up i need to be certain its fuelling right....
thanks in advance,
richard.