use a full synthetic oil or not ???

[YBUSA]

I have 2012 busa that is due for its 12k service , my dealer savage Suzuki recommend a full synthetic oil . due to these guys being so busy ,I`m looking elsewhere to get the work done . another dealer said I should stay away from a fully synthetic oil . I was told if I like to give it a bit of stick (drag racing ect ) a fully synthetic oil could cause clutch problems . can anyone give me an opinion please ??????
matt

Hi Harry, I sell oil for a living and you are welcome to call me at work during the week 03 9555 7510 all these bikes must run a synthetic, but it must also be suitable for a bike, that is the catch. Bike oils have no friction modifiers or the clutch will slip. Anybody who tells you not to run synthetic oil knows nothing about oils.