? How lap crank 1999 KTM Pro JR 50

Joined
Sep 17, 2001
Messages
38
Likes
0
#1
The flywheel (Rotor) on my sons KTM Pro JR 50 slips a little. The shop suggested I lap the rotor on.
Does this mean put valve gringing paste on crank and than slide rotor straight on and off a few times? Or,use some emery cloth and sand the paste on the crank itself not touching the rotor?