drunkn munky wrote:

paul g wrote:The MC18 carbs have a different air solenoid set up to the 21/28 so that might be a whole different can of worms.

It's just pipe routing though isn't it? I've been using the 18 carbs with 21 solenoids all last year and it's worked fine

Maybe that's all it is, I remember the solenoids and plumbing being more complex then the 21/28 set up. But anyway if it works it works