how long would it take to start having problems if you don't put enough oil in a brand new engine? i think i really messed up, i had just got a new engine put on my bike, and after a long day of work, i have no idea what i was thinking but i only put about 2 ounces of oil in my .5 gallon tank. it ran fine for the ride home, then the ride to work the next morning but when i tried to go home, when i went to start the engine up the pedals wouldn't move. i pushed and pushed and got them to move just a little bit but nowhere near enough to start the engine. is it possible that this is related to the improper fuel mixture? i mean the ride to work is only 7 miles one way. when i put my bike in my girlfriends truck to take it to another motorbike expert most of the gas leaked out in the bed of the truck.. the guy is going to have a look at it tomorrow.