Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Hi Mo. Yes they are a 500T carb experiment that so far is not going too well. Hopefully removing the air cut off valves will cure the problem. Just re-looking at the advice that Ash sought on Facebook, and I'm not sure I agree with what was said. They mentioned that the cut off valves introduce extra air on the over-run to stop exhaust popping, that's not my understanding. I'm fairly sure they introduce extra petrol to enrich the mixture past the point of ignition so it cant burn in the exhaust header. Hence my running rich problem, and why I'm removing them. Will find out once the jobs done and the weather allows a run out.
I have got a set of 450 carbs on the way (not sure which model will see when they arrive) so I am going to strip all the new bits back out of the 500 units to reuse. I will order two genuine seal kits from DSS at some point. Also got an ultrasonic bath coming so I can save having to pay people to do them. Cheeky to ask, but are you still doing your own zinc plating as I could do with some small carb bits doing.Sent from my Pixel 7 Pro using Tapatalk