Ok, so prior to taking my 2012 XL1200C for a 240km ride, I'd had it serviced, and immediately after and for two weeks following, everything was fan-friggin-tastic. Time comes for the end of year holiday: 2 weeks 'down south' (Busselton for all the WA members). The whole ride down, everything was ok, but when I went to ride my bike to the nearest bottle-o the day after, I noticed there was a nasty wobble in the handlebars, at low speed. I figured it was just time for a wheel balance, and left my mind at that, but the wobble got progressively worse.
Time comes for the 240km ride back home.... I didn't even manage 10km before the wobble became so bad that the whole back end was fishtailing - I barely managed to ride the bike back to where I was staying. Long story short, I got a mobile mechanic out who specialised in HDs, and after he took it round the block (I started the bike and kept the FOB), he instantly diagnosed it as loose spokes in the rear wheel. What I hadn't noticed, due to my distraction with the wobble, adrenaline from a whole-bike wobble at 120km/h, etc, was that the wobble had caused the upper belt guard to literally snap off it's weld, and the guard had started grinding up the rear pulley (sprocket)!!!
(After the mechanic tightened up the loose spokes and removed the now bent upper belt guard, everything was 'ok' enough to ride back to Perth, and straight into Perth HD!)
Bottom line: EVERYONE with a recent sportster, that has stock HD spoke wheels, should specifically get them checked regularly, to make sure that s**t like this, doesn't happen, otherwise you'll be out ~$1,000, over basically nothing!!!
Have broken spokes on rear wheel in past, but they where not loose, when i broke 5 spokes on rear wheel i got a flat, as spokes puntured tube from inside.
you would think if you get you bike serviced at HD they would check & tention spokes when servicing?