Hi guys o need help with my vfr400 nc30. I changed the countershaft seal but there is so much sump compression it keeps pushing this seal out. Is this worn piston rings? Or something more serious? What size are the piston rings? Or what other bikes piston rings will work in this bike? Bike is un modified. 1989 model. Please help

Sent from my LG-D722 using Tapatalk