Hey everyone, i am having an issue with 2006 636. It was just about 13,000 miles now and i have just started noticing this week that when ever i put the bike under any kind of significant power just about half way up the power band i get very violent jolts. The first time it happened it scared the crap out of me and i had no idea what it was. I thought it could have been the chain because it has not been tighened in a fairly long time... After tightening the chain i am still getting this jolting. I am beginning and i really hope not that something is wrong with the clutch or transmission. The last maint to do on this bike was an oil change with amsoil 10W-40 motorcycle oil, which was about 1500 miles ago. Can anyone shed some light on this situation? any help would be appreciated.