looks like excessive use of the fuel additive "SH*T" to me
Ha, yes, I did notice that one of the holes in the "ears" on the diaphragm was smaller than the other, on the replacement part they are both the same size, maybe it was a mod, anyway it works perfectly now, I accidentally rode off my driveway onto the road yesterday and in my panic gave it the beans in first and second before managing to turn around and get back to the house, it seemed to go well, could it be that I have chanced on the correct carb set up first time round!
, not very likely , we'll see once I get it finished and take it for a good run.
