I have several 83 to 85 Royals with the air compressor, am/fm cassette, intercom, and rear shock. If I can make the air suspension and intercom work (If I can find the wiring and such) I will install them on the '88. I have a Mk 2 set of forks, how can I tell if they are Royal forks or plain Jane forks? The forks CURRENTLY on the bike need a new set of springs (do they even have springs?) or refilled with fluid (what fluid goes in there anyway?), and what's the "boxy"thing on each front caliper?