I have a Blaster that starts just fine but seems to fall flat on the top end in 1st and second gear. 3-6 seem ok. I have played with the mixture but I can only get it to a certain point but not enough to fix the problem. I am at about 5000 feet in New Mexico. The Blaster is all stock. What are the stock jet sizes? What settings are people running? Does anyone know if there may be another isuue causing this?

Thanks
Jim