I recently ordered a mototrized bike kit from walmart.com and when i received it, the clutch was really tight. Like to the point where the little brass cable stopper will just let the cable through it when the lever is pulled in. The clutch arm isnt stuck, just very stiff. I have read the threads on how the clutch plates are stuck to the actual engine, and tried to use some of that advice, but to no avail. Any tips would be appreciated. Thanks!