These will appear in an upcoming photo thread on clutches, but since I got them together now, I figured somebody might find them useful. THESE APPLY ONLY TO THE US and CANADIAN 550/600 CLUTCH (and possibly the 400-four cyl) NOT TO THE BIGGER BIKES. The Japanese and World (and probably Euro) market bikes apparently had a clutch with two clutch boss springs, like in the diagram. Every US and CDN market 550/600 clutch I've seen only has the one, as explained here. The bigger bikes are a lot simpler. The EXPLODED views in both the factory and aftermarket books are wrong for the USA bikes but apparently DO apply to XJs sold elsewhere; Here is the correct info for North America: NOTE: This diagram also has another flaw, it only illustrates a total of seven friction plates when in fact there are eight, seven "normal" ones and one "special" plate with a large ID for the clutch boss spring. Likewise it only shows 6 plain plates when in fact there are seven. WHEN REASSEMBLING the clutch, you need to know this, the orientation of the asymmetrical "tabs" on the plain plates: The pic on the right is the "Clutch Boss Spring" and third friction plate, as called out in the corrected exploded view. Like I said, this is North American market 400-4/550/600 specific info, and will not apply to the 650/750/900s. Thanks to forum member kickaha for the additional info, every little bit helps.