WOW! Remarkably simillar to the problem I had with my SE 6-spd. See here:
Damaged SE 6-spd tranny parts
Slightly different situation, but unsettling that both your problem and mine involve the pully shaft drive gear.
I would start with HD to see if they will do anything about it. To me, that is clearly a manufacturing defect. But it is a seven year old tranny. So they might say, "they all do that"!!
Make sure you call the mother ship and send Customer Service/Satisfaction beaucoup pix of the defect with markup circling the defect.
If you get no satisfaction from HD, then I am afraid you are in for needing to rebuild the tranny. So you have to do some soul searching about your options. Here they are from cheapest to not cheapest:
- Go through tranny and replace only damaged/wear parts, orings, seals, gaskets, etc.
- Revtech builder's kit gearset in 5 or 6-spd
- Other third-party builder's gearset (like Ultima, etc.)
- Baker DD6 builder's gearset (top-of-the-line to me)
These options assume that your case is OK. Take it off the bike, strip it, clean it us so that it is spotless, and then magna flux the high stress areas to make sure there is not a problem with it. If you find a problem, PM Chopper and discuss the tranny I sent to him. Do the same thing as above with the inner primary.
If the case is good, then the builder's gearset kits are your best options if finances permit. If I had it to do again, I would NOT go with an HD product, but would opt for the Baker kits. To me, the DD6 is your best bet for the long term, particularly if you do a lot of touring.
If your case is shot, and you opt for a replacement assembled tranny, again I think the Baker stuff is top-of-the-line. But you will have to evaluate your options and what fits in the budget.
While you are tearing into stuff, evaluate the condition of your cam chain tensioners. If you still have the original equipment spring-loaded tensioners, consider replacing those with the roller chain conversion, or the gear drive system. The tensioners are another gernade just waiting for the pin-pull.
Let us know how you fair.
TQ