Yamaha humming/grinding noise at idle in high

[blewis00]

hey guys I recently put in a new machined sheave and new oem belt with duner clutch springs, weights, slides etc. everything moves nicely when in nuetral however when i shift into high or reverse i hear a humming noise at idle which goes away under load. I also blew up a belt after the install but that was a dayco aftermarket which i think im chalking up to being a POS. It is also hard to shift from high to neutral. I have to shift to reverse then back up to neutral. That and the noise concern me. Ideas?? thanks.

 

[blewis00]

I disassembled and reassembled the primary, and re-greased all the weights. everything is sliding correctly. havent checked the springs. the clutch assembly seams to be working fine.

 

[blewis00]

please explain further. what would cause it to run smoothly in neutral and not in high drive.....until there is a load put on it. when i hit the gas the noise goes away. thanks