After about 15 minutes into the ride it stalls at red lights, but starts right up easily. How do you fix this? Will a boost bottle correct this? (BACKSTORY: New 66cc grubee engine, still using the 8oz oil to 1 gal gas break in mix. New carb from thatsdax.com) I don't want to dink w. carb until out of break in period. THOUGHTS?