Hi everyone. New member, new owner here. Thank you for all of the info I've gained lurking the forums. I've been riding my 74 R90 for a few months as I work through the areas that need attention and enjoy the bike for the summer before I take it off the road for the winter and do a refresh with it. Most of the systems are in good working order with a few things being quirky but all signs point to those being worked out with the refresh. One thing that is happening and seems to be getting worse is that on down shifts to a stop or slow down, i.e. coming off a highway or up to a stop sign after a stretch at speed the bike will backfire and stall. I have tried to approach this situation by pulling in the clutch and gliding to the exit or stop without down shifting and it will stall and backfire as well as down shifting at appropriate speeds and once it gets in to first it will do the same. The bike will sputter and backfire if my up shifts are not timed accordingly and I attribute that to operator inexperience. I just came back from an afternoon ride from Wallingford Ct to Gillette Castle and on the way back the problem was noticeably worse that whenever I came to a stop sign or similar decrease in speed it was stalling and backfiring. If anyone can point me in the right direction for diagnoses or resolutions it would be greatly appreciated. THank you again for the information and I look forward to hearing what all of you have to say. I am really enjoying this bike and want it to run as smooth as possible. Thanks.