Yes, get a torque wrench. Do not guess. Yamaha
had revised the spec from 61 to 47 ft lbs so, they feel too much torque is a bad thing. The hole in the side cover along with the smaller one above it is in order to rotate the crank to put the piston at top dead center for valve adjustment and other work. Ever heard the accronym RTFM? Something that may be of interest. My bike number falls into the highly suspected range of failure. I have not checked the torque on mine yet. I plan to do so at the next oil change so I can remove the cover and see inside. I have over 100 miles on it now and have raced a two hour hare scramble with no issue. I have used the e-start but have been kick starting it also. I understand that the e-start with a back fire causes the problem. I have been very careful when using the e-start and not touching the throttle as the manual states. Yamaha
did make a poor call by putting the starter ring on a taper fit flywheel. I bet in the future, they either move it to the other side or put a spline on the shaft to increase the strength.