Thank you for the replay. Actually I left the LSN at 3 to 4 turns open, just at the point where I start to see a red 0-ring from the needle. The engine seems to work better, but when I accelerate the engine doesnt respond well. I tried to lean out the HSN, but I dont want it to lean it out more because the engine gets hot too early, just in a minute or less of low acceleration.

I tried two plugs, one hot and the other medium hot I believe, and both seem to work ok, I think, although the plugs seem to get a bit darker. The HSN at this point is set aroung 2 to 3 turns open, which is more than the manual was saying of 1.5.

The fuel I use is 10% Omega fuel, as the manual was saying of not using a mixture with nitromethan not higher of 15%. However, now I dont know if the fuel I use is 10% of nitromethan or 10% of castor oil. Can someone tell me? In the bottle doesnt say anything. I sent an email to the factory and they told me I should try a fuel with a higher oil castor, around 15%.

Some suggestions?