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Greetings, I've just joined, since it seems all SACS gurus are here (I've already browsed some topics; and checked the Frankstein guide, many times). I have a kind of weird project in my hands, for my recently bought GSX750F ('99, as new as one can get: only ~3000 miles, 1 owner); stuff like *reducing* wheel size, *reducing* engine capacity; plus: political incorrect paint job (Lucky Strike cigarretts propaganda), maybe 4-2 mufflers vs. stock 4-1; etc. So, to get to the point: I have several New Old Stock 600 heads; have new camshafts also; I know I must buy new valves, since my 750 valves are bigger and can't be transplanted to a 600 head; valve springs are softer on the 600; but all other head parts are the same, except the rocker arms!, see bellow: model / rocker arm part number GSX600F, Bandit 600 / 12840-19C00 GSX750F, GSX1100F, GSX-R1100, Bandit 1200 / 12840-27A01 Does any one know what's going on? Maybe different ratios? I really would like to avoid buying 600 rocker-arms (x8 = very expensive)... In short, my question is if these are interchangeble, or better not do do it (i.e. it's safe to use 750 rocker arms in a 600 head setup)?... Thanks in advance. Regards. -Antonio Mota
