I suspect you’ll need to disassemble the the crankshaft to get it right.

insert the crankshaft and reed case into the bottom of the crankcase and press in using an arbor press.  The crankshaft counter weights need to be supported (use a bolt and nut) to prevent bending the crankshaft. As I stated previously, it helps to put a witness mark on the reed cage/crankcase before disassembly so you get it lined up on reassembly. locating bolt won’t line up unless it’s properly lined up. There is a locking washer under the locating bolt to prevent it from backing out. It’s been 20 years since I did this maybe someone has other tips to help.   Seems like I used a washer to keep the crankshaft from damaging the reeds when removing and pressing crank/reed cage in.