94' shadow bucking

i have a 94 shadow 2.5 its been acting bad. the tach. is all over the place at normal driving speed like 45-65. feels like the tranny keeps slipping, check engine lite comes on and reads 12 and 41 which is altnaterand battery and both pushing 12.5 volts while car is running. Please Help THANX

nevermind runs great it was the computer