88′ Foreman TRX350D pulls to the left when you let go the handlebars

I had to basically rebuild this bike of mine and ended up having a 1988 Foreman 350 with the rear and motor from a 1987 Foreman 350. Everything works well except it pulls to the left when you let go of the handlebars. Any ideas what is causing this and how to correct it?

Yes, it has all time 4×4

88′ Foreman TRX350D pulls to the left when you let go the handlebars

I had to basically rebuild this bike of mine and ended up having a 1988 Foreman 350 with the rear and motor from a 1987 Foreman 350. Everything works well except it pulls to the left when you let go of the handlebars. Any ideas what is causing this and how to correct it?

Yes, it has all time 4×4