To those who has problems fine tuning their Novarossi engine (and any other engines for that matter): 1/10 or even 1/12 of a turn on the needles are too much. You should bearly be able to see the srews moving when you are going to tune your engine for the race tune! Try it and be habby. Otherwise you either get it too lean or too rich and wont be able to get the best out of your engine.