at the weekend i did the following for a mate – full suss
replaced rear gear cable, investigate rear hub rumble, check shock pressure, all over check.
greased the front and rear hubs and headset bearings gave everything else the once over, thats bolts, spokes, pedals, tyres, saddle, everything checked/tightened, then produced a list of issues, as below. All in it took me 4hrs
chain stretched >1%, cassette worn, middle ring worn, BB has play, LH fork bush play, fork seals leaking – i then advised on costs of replacement/service and timelines.
4hrs at lbs prices is £100 easy, my mate knocked a chunk off the cost of the head gasket he did for me