My XR70 hasn't been rode in a while.. So we cleaned out the carb, and the spark plug. Put new gas and it starts up again. Well, the problem is we can't take the choke off cause it always dies... it runs okay with the choke on. You can't throttle much gas though, or else it stalls out. Does anyone have any tips on why? btw, We let it ran for a good while to heat up.. we do live in south texas.