Lets not forget that a professional is just someone that does a job for a living, thus that is their profession. You could be the biggest fumble fuck in the world but as long as the shop keeps paying you to change blinker fluid and change muffler bearings your still a professional. Once a master mechanic with 30 years retires he is no longer a professional, yet he has forgotten more than the pimply faced highschool drop out, that is still getting payed to change oil and has only been doing it for a month, will ever know.......but the drop out is a professional.......NO THANKS, I'll do my own work. If it's a warranty issue, all you have to do is show proof that oil changes were done, keep the receipts and make a log book of when and what was done....it also helps if when you change the filter to use a different brand of filter than the manufacturer puts on ( but still use one that they reccommend), that way there is no disputing that the oil and filter have been changed at least once.

Keep in mind, the professional isn't stranded on the side of the road or in the hospital when your bike goes tits up, he could care less because he's at home playing on the ps3 that he just bought with your money. It's your ass (literally) that is on the line and YOU are the only one that will take the care to make sure everything is done to spec.