Lean the LSN some. Maybe the HSN. Go 1/8th turn in on each. Fire it up, gently clear it out with the wheels off the ground. Throw it on the ground and drive. If the idle steadily drops after a good 6 minutes of running, lean the LSN another 1/8th. If it idles afterwards pretty steadily without the rpm's climbing. Start tuning the HSN for a decent top speed. Small adjustments with pplenty of time for the engine to adjust to the new setting.Then fine tune the LSN for good initial acceleration. You will need to adjust the idle screw and throttle linkage to compensate afterwards. Keep the fuel tank at least 1/2 full. Don't pull out the temp gun until it performs and you think you have it tuned. If it is under 270F at the end of the tank, leave it be. Always tune for performance, then temps. Some engines run great @ 180F, some don't do poo until 280F. Depends on the quality of the engine, fuel ,plugs and how it was broken in.