Need advice !Got one original 500 EFI,2002 without flywheel,got 1 flywheel from a 525 EFI 2002,and one from a 502 Mag mpi 1999 what`s the best one to use?

gen5 and gen6 use the same flywheel,so they are both the same.

Mike,
it`s difference balance I`m worry about,thanks.
Bjorn.

The 502 Mag uses the same flywheel as your 500 efi. Use that one. The casting numbers on the flywheel should be 805.
Eddie

Problem is that I forget what motors are in internal or external balance,does it mean the 525 EFI is internal balanced and the 500 EFI and 502 Mag has separate balanced flywheel and balancer?Thanks Eddie.
Bjorn.