On my last ride of the season last October I heard a faint tick, tick, tick noise. I shut the engine off and the noise persisted as long as the bike was rolling with clutch pulled in, but I couldn't locate the source. For my spring prep I have a lubed the speedo drive and cable, and I have installed a new RK o-ring chain as the old Diamond chain was ?? old. I have adjusted the disc brake wipe. The wheels spin freely and the wheel bearings seem OK. I have read here about clutch rattle but I don't know what it sounds like. Does the speedo ever need a lube job? The front tire has a center groove but there was no rock trapped there. Most of the bike is OE. Or is there some kind of time bomb hidden here? 750K1-56Kmiles