Kevin frazier
Widowmaker!
When you crack it @sonny we will know what happened in yours, i bet 4th didnt break and the circlip is off due to that heavy fifth gear cog wacking it, a billet 4th gear is not the answer to a bullet proof transmission, 4th gear is not the problem as far as being weak when all the gears are the same, the circlips dont get dislodged because of a gear that should be billet, but for only 250 not an issue. There has been a billet forth destroyed when other stuff came loose, certainly not the billet 4th gears fault. Oem Forth dont just explode on its own accord.