it's a motobecane 26" crome beach cruiser has a grubee kit ,im the second owner, my opinion is the "air" between the bushing and the clutch drum {needs} a "missing critical" needle berring .i had hardware failure bushing cracked clutch failed ,ordered replacement parts the clutch drum was made out of the most inferiour metal i have seen/for a gear/unbelieveable. it runs now,but after somme miles the vibration only seems to worsten