Re: 1963 Sportwin O-Ring on Upper Crank Bearing? Home › Forum › Ask A Member › 1963 Sportwin O-Ring on Upper Crank Bearing? › Re: 1963 Sportwin O-Ring on Upper Crank Bearing? h20lewUS Member - 1 Year (includes $3 online payment fee)Replies: 51Topics: 17 December 24, 2017 at 5:42 pm #68955 Thanks guys for the advice. Much appreciated. I’ve got one more re-assembly question on the connecting rods, but I’ll post that as a separate question.