Hi all, I have a GSXR750X that I bought new in 1999. After being off the road for 10 years, it's back on the road. The issue is it kangaroos when trying to hold the revs steady especially @ 4000 rpm. It also doesn't drop to idling revs, instead of 1500 rpm, it sits or goes up to 3000 rpm. Has anyone experienced this or have any ideas?