I have not had much luck with the front end of my 2007 yz450f. I had the front forks revalved (kept the stock springs) by a very competent suspension guru. First problem I had after about 4 or 5 months was the inside catridge coming loose. That was duly replaced. Now about 2 months later my right fork spring broke about a 1/3 of the way up. That was replaced with a race tech spring. 3 days later and the left spring broke at the half way mark?????????? Fortunatly the race tech come in pairs. The guy that does my suspension says he would not have believed the story if he had not seen it himself. I feel like I'm in the twilight zone. I'm not overly hard on the bike and weigh 78kg. Any ideas on what could be causing this.