That's known as Coffee Grinder Syndrome on the VN750. Warming the engine and moving the clutch lever in/out a few times in neutral can help avoid a problem on the first takeoff. But you should always be careful on the first couple of takeoffs anyway, keeping the rpms low and slipping the clutch until it fully engages. The rest of the day it should be fine, however mine did have CGS once after being parked a couple of hours.Yeah, I'm running 5W40 Shell Rotella Synthetic, too. Seems to be OK. . . .
The only thing that I notice is that the clutch *really* grabs when the motor is cold? I'm thinking that maybe I should try another oil on the next change to see if that makes any difference.
You all think the 5W40 might be causing the clutch to be grabby like that? Maybe the oil doesn't really matter?
There's info on the forum for CGS, drilling the clutch basket, etc. Seafoam treatment in the oil helped mine for a while, but it was back after a year or two.