The most annoying part with the modification is that if the raised section on the cam had continued right through to the stop position the washers to raise the cam would have not been needed, you could then just cut the ramp to a gentle grade and it would work perfectly. The other issue the washers under the cam cause is because it lifts the cam it makes fitting the cable more difficult and you have to be very careful because you get a slight bend in the cable and then it becomes notchy. Sure if you can get an unmodified carby to work and some do for some reason, just keep it that way but I find I have to modify 98% of them and then I know they will work without problems
