I've noticed some lag at low revs, fooled around with pilots. finally put it down to the CV carb. Its been puzzling me though, trying to get the idle down, idled fine, no stall, not rough, but would go below 1500 revs.
So poking around I found little prick holes in the air cutoff valve, but I havent had any decel popping. Also noticed some buildup on the AV piston, so I'm thinking this was having it stick, enriching the slow circut. Ordered a new valve, be interesting to see how it changes