i figured i needed a compression tester that is a no brainer I was wondering what numbers i should be looking for good compression how high should the tester read or should i just be concerned with cylinder leak down i believe it is still stock bore my banshee will not start unless i spray staring fluid around the air filter i was wondering if i it needed the top end rebuilt seems to run fine with lots of power after it has started it just will not start with out the starting fluid may be it is the carbs i am just trying to figure it out any help thanks much also how much should a top end rebuild cost