2004 ST1300 with 45,000 miles, sidecar fitted a long time ago. The bike will periodically refuse to shift in/out of first when the engine gets fully warmed up, followed by driving in stop and go traffic. This has been going on for several years, mostly a nuisance. More recently, I've noticed the bike may creep slightly when stuck in first, clutch fully pulled in and motor running? Switching the engine off then provides normal gear selection between first/neutral/second, etc. Otherwise, shifting thru the gear box underway is reasonably smooth and uneventful. I have recently fitted new gear shift linkage, clutch slave cylinder, SS clutch pipe, and full clutch flushing etc, in an attempt to resolve this. I use Valvoline 30/40 synthetic brake fluid, and Rotella T6. Looking for advise for next steps to eliminate this nuisance. Thanks