So how come the Model Specific thread begins with the model year 1983? The Sabre came out in 82. You-all won't kick me out for that I hope! I've owned my 82 Sabre for 21 years. Bought it used in 83. I've experienced all of the "issues" this bike came with so far except the top-end oiling thing. I have not made the top-end modification to this engine but it still runs great. I'm running with ATF in the rear transfer case to try to deal with the constant oozing of 90 weight gear oil that seems to constantly trickle out of the vent. This keeps the rear shaft constantly covered in dirty goop and makes the rear tire look awful. Now I know the specs call for gear oil in the transfer case. Service bulletins were modified to reduce the oil capacity to deal with this problem of pumping oil out of the vent. ATF has been used in manual transmissions for years now so I'm thinking it will be okay here. I've been running with it for about a week now and the oil-pumping has stopped. Do you think there will be problems with excessive wear over time? The rear shaft case always gets very warm to the touch after a good highway run and that continues to be the case here but what do you-all think about this? Any petroleum engineers out there?