After a recent punctured tyre in Sydney I have taken my motorbike back to the place i bought it off (suzuki drz400sm 07) to get a new tube fitted. Prior to this tube fitting my bike had a major service with them (1st service) Where they check all sorts of things and one of them was align the front end as apparently it wasnt straight (i had a slight off, bent handle bar mounts etc) they test rode if after the service and everything was a, ok. To me the bike was 100% fine in the front end before the major service, and it felt exactly the same after the major service. The problem comes 3 days later after they had fixed the flat tyre. I ride out of the shop and instantly something isnt right, it feels strange/loose in the rear end. I ring them straight away and explain the issue, then take it back the next day. They say that the steering bearings were loose and thats what was causing it (Which they were supposed to check in major service) but that didnt fix my problem. I take the bike back to them again, this time they verify that nothing is wrong with the rear end, its all aligned and everything is 100% correct and the issue is that the bike is pulling to one side. They tell me its a problem with the steering. I find it HARD to believe that its the front end as they "aligned" the front end in their major service, the bike road fine up untill they changed the rear inner tube. They then said they put a whole new rear tyre and wheel on the back and associated parts from another bike and rode it and its still pulling to one side slightly. Re-firming their view its in the front end. They believe its some damage/bent part from my previous crash. I also find this HARD to believe as the bike rode fine, before and after their major service and only when they changed the rear tube is when it began to feel not right. Im extremely frustrated as my motorbike mechanical knowledge is pretty slim. The shop wants me to pay an hours labour for all their double checking of the rear, then an hour or so labour for taking the front end off and sending them to be fixed. They still dont know what the problem is and i feel that the shop is trying to take me for a ride. Especially due to the steering bearings being loose after letting them know of the knocking in the front end, and them writing down in the invoice they checked the bearings when they didnt at all. What should I do?