[Vibration with Big Bore???]

Thanks for the advice guys. Hopefully it's just the lower shaft cause I don't have time to take the hole engine apart before racing season starts.

[Vibration with Big Bore???]

I just had a Wiseco 1195 kit installed and some mild port work done on my 99 Bird. All other engine components are stock. The vibration from the engine has noticeably increased, especially at lower revs. Is this normal or did my mechanic screw up the balance shafts? If so, I may have to lock-tite all the bolts.