Join Date: Nov 2009
Location: Lander, Wyoming
That is the Lower Rear engine mount Nut.
You need to have someone to assist by holding the bolt Head on the left Stationary with a 14 mm socket, because if the Bolt head turns it will Rotate the lower frame Chain Slipper up off the frame and push the chain up against the swing arm.
Torque to 32 ft lbs. Check all the engine mounts. The small ones are 18 ft lbs.
Modify at "YOUR OWN RISK"!
Still riding my 1987 KL650-A1. 84,000+ miles & counting