both me & my wife have sportsters bought new in 2001 - around 5000mi they both started to slip, clunk in 1st gear maybe 1 out of every 6 take-offs, the dealer replaced the 1st gear in mine and the 1st & 3rd in my wife's. now I have 15000mi and she has 11000mi and both bike's are having the same problem again. the dealer tech says some models have this problem every 5000mi. has anyone heard of this or any info from HD about this?