Well, Ive never had a single problem with my 250 motor. Its never once let go (apart from when I let go of it at Cadwell lol) and I think I give it some abuse. I run that on bog stock unleaded and she will make 62-63bhp all day everyday. There can't be many flaws in head that can do that from stock?
_________________
If I have to take the carbs off once more...