Thanks for the reply, they all look like U's, and a recheck of the codes has two BA's and 1 AA. Guessing the AA is an MC18 carb then. Anyway fitted the HRC kit to one carb, and noticed the other already had the tubes, adjustable needle and bigger jets fitted. Interestingly it had 42SJ and 170MJ but still with PJ's. I've gone with the base HRC setting so I'll see how that goes. Will be awhile before I can road test, but seems to pass the stationary test recomendations in the tuning section. One other Q, in the additional PJ blanking pack I noticed a ball bearing, do you know where that goes?
