One thing I would check IS the "clutch adjustment"...
Also Where the clutch Cable free-play is.. 1/16 to MAX 1/8 inch at the handlebar when pulling on the cable housing and look at that distance from the handle stop.. This is called cable Free Play...(set when cold)
I would NOT want more than a Full 1/2 turn off the clutch at stop...(set when cold)
More than 1/2 turn out, allows the clutch plates to be CLOSER together(less separation) and the DRAG you notice...
More than that 1/2 turn out on the clutch adjustment will affect the distance between the plates (LESS)...
I like have that FULL distance especially when sitting at a red light with my clutch pulled in,,,,, as I keep it IN GEAR and ready for a quick get away if needed...
Those ways described above uses "Less clutch plate friction drag" resulting in less wear on the clutch.
I use MTL redline OR Redline V-Twin Primary Oil.. Both work good,,, Help the primary out of the "too heavy primary oil" syndrome...
Redline Keeps things smoother and Less friction cold than formal+ or Other Heavy primary lubes...
Just My Way
signed....BUBBIE