The first Mount Up graded from Thunder Bird.Was so bad It shook my feet off the floor bords and broke exhust bolt. I order one from J@P 4300140 installed it this morning and shimmed it with 1 washer . What a differance very little vibration. I called Thunder Bird and said I wanted a refund because the mount is faulty and cat't be used I think they know Moco has a bad mount. They said 20% restock that is BS .Im thinking what about the hours I was balled over with the mount.

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