Just a few to add from me:

JER (Departures) very straightforward and not weighed. Take to outsize baggage at far left of check in.

LGW (Arrival) Bike through main luggage carousel but had to put vertically on trolley to get through glass doors..

LHR T3 (Departure) Not weighed and had to take to outsize baggage. The guy mentioned security sometimes require them to be opened so went into the bowels to the security scanner but no issues arising, just a bit of a tour!

YVR (Arrival) Bike arrived on outsize carousel to left of exit where skis buggies etc also arrive.

Only 1 experience but all very easy. My second suitcase was golf clubs which followed an identical process!