1961BMWR69S
1960R100S
Hello every one. Ok I'm building a /2 conversation.the bike is 90% done. Just elect and waiting on the exhaust system from epco. It is a 1965 frame,1960 swing arm and a 1960 R60/2 rear end with no vent. The motor I'm using is a 1977 R100s w 40mm carbs. I have five /2 bike,61r69s,65r60/2,67r50/2 two 69r60us. Know all my /2 have a vented rear drive. With the r100 motor in this /2 should I put a vented rear drive on or just leave the none vented one on. I'm thinking I might build up to much psi in the rear drive with running this 1000cc motor and maybe blowing a seal. I just rebuilt the hole rear drive so it has new seals in it. I also have a r69s rear drive and a r60/2 vented drive on the shelf.I don't know if I should change it out or not, or just ride the bike and watch what happens. I think I'm problem going to blow the rear end with all the power from the r100s motor. It is going to be a solo bike only. Vent or none vent