what or why are you changing might help. Are you going to a smaller front sprocket? 15 to 14 ..... How old is your existing chain and rear sprocket as if they are worn they will wear the new sprocket down. A smaller front sprocket mean the back wheel will go back further to get the correct chain tension, if the chain is already worn and the wheel adjusted back you could get to the end of your wheel adjustment, plus it being this far back will effect your rear ride height too that will then need adjusting as well.. fit a crank case protector whilst you are in there...... Oh and of course there is a correct torque.
I always though that was high, I remember doing mine and the torque wrench hadn't clicked and it started to feel wrong so I left it at ??Nm.
Yes, 15 to 14 to drop the gearing a little. No obvious wear to chain or sprockets. Adjustment is not far to the rear. 186 Nm sounds a fair bit - roughly, what is that in ft lbs? If in doubt, I tend to base it on how much effort it takes to undo and apply similar effort into tightening it again. Hardly scientific I know...
being the smart arse mechanic that i am, i ignored the manual and relied on my vast experience to tighten said nut. it came loos.
