Where to start? Long story, please bear with me. Bought an 07 leftover in 08 and had it triked by a motor trike dealer. Since new I have had what I can best describe as a coffee grinder sound that starts in 3rd gear and through 4th and 5th. It may be doing it in 1st and 2nd but I can't hear it. I have had the valves adjusted - same. Noticed that the sound goes away when I pulled the clutch in so a new kevlar clutch was put in - same. Dealer said the drive shaft was loose so a new drive shaft (under warranty) - same sound. Had the whole set up re aligned by the dealer and Its slightly better but I still hear it. Here is my question - Do you think I'm just hearing the normal sound from the Ford Ranger rear end and drive shaft spinning? It runs awesome so should I be worrying? Also I just noticed that when the sound starts if I pull or push on the handlebars it goes away while I have the pressure on. It doesn't have an ez steer rake but I'm thinking the head wobble is causing this? Man I'm so frustrated....please help if you can decifer my rambling........thanks!