I'm running T6 5w-40 synthetic in all my bikes (two and four wheel varieties). I used to run Mobil 20w-50 synthetic in my VFR's with good pressure (not too high) and no clutch issues. Some VFR guys had a lot of oil tested and saw that the wet clutches sheared oil pretty bad and pretty quick in most cases, so the 20w-50 stayed in the happy zone a long time compared to most oils. I'm not advocating heavier oil, but I doubt it's going to explode, burn, and die and explode some more because of it, especially if one lives in the deep, hot South. Probably wouldn't hurt to change it to something lighter before the next winter season, though.