I have been bench running a new Moki 2.1. When I got it it had a gallon of fuel through it. I have about 1/2 gallon through it. I can't seem to get the engine to turn more than 5000 rpm at full throttle - is this normal? When the engine nears the bottom of the tank it does come to life as the mixture is leaned but I do not let it run under those circumstances for long.

The high speed needle valve seem to have no effect on the rpm - I have it set to about 3-4 turns. I have not touched the factory setting on the low speed mixture dial. I am using 3/32" fuel line with an inline filter. Pressure is from the muffler. I am using new omega 10% nitro fuel and an OS F plug. It does need to have a glow igniter to keep running.

I have ordered a cline regulator and will be sending the carb in to get some work done by Cline.

Am I going about the break in right?
ScaleMe