its just a little mojave 250. Its all stock. I made the choke seal correctly. I took it around my yard in the snow and on the road with the snow and it ran good. I then ran it on the dry pavement and it had quite a bit of hesitation........its wierd, one rev it will rev right up and then i will rev it again and it will be hesitant. Air filter is clean. It has those shitty CVX carbs that has the vacume operated slide. Kinda thinkin about getting a different carb but dont want to spend $165 on another carb if thats not the problem