Their first offer was £2.95 for every one of the 134 miles I did on it. I settled on half that. The fault wasn't diagnosed, or at least revealed to me. The suggestion was that the oil filler cap was loose. I couldn't be bothered to haggle over the rest as I didn't want it dragging on and all the good biking weather disappearing. If the hike is returned under distance selling regulations then a charge for excess miles is allowed, although the distance and fee per mile weren't specified in their terms and conditions.