Original ulster engine rebuild

[Dave Mann]

Well that answers a question I've asked many times over the last 40 years, that's do pressure fed engines have baffles, thanks Tony. What oil are you using Tony? I used Duckhams Q20/50 until it wasn't available then tried Castrol Classic 20/50 for about 50 miles when two exhaust valves started to stick and looked just like your valves. I dumped the Castrol and tried Unipart 20/50 a mild detergent oil like the Duckhams and had no valves sticking.