AbitNutz Posted August 13, 2017 Share Posted August 13, 2017 I'm a bit confused about what changes were made on the 550B to turn it into a 550C and when this was done. Also, I understand that the 650 was treated to the same changes but there was no model name change. How do I tell if my 650 has this upgrade? I heard it's not practical to up update because it's some sort of frame change. Link to comment Share on other sites More sharing options...
yukonjon Posted August 13, 2017 Share Posted August 13, 2017 Per Dillon, "The upper link arm pivot pins are now threaded in place, and have a grease groove around the pin that connects with a lube hole on the end of the pin. Use a needle fitting on a grease gun to lubricate the upper pivot pins now."I'm guessing the 650 if upgraded would have the same greasable pins but I am not familiar with that one. Link to comment Share on other sites More sharing options...
AbitNutz Posted August 14, 2017 Author Share Posted August 14, 2017 (edited) Any idea when these changes were implemented? I'm particularly interested in what they did to the 650, assuming it was any different from the 550C, and when they did it. Edited August 14, 2017 by AbitNutz Link to comment Share on other sites More sharing options...
dillon Posted August 14, 2017 Share Posted August 14, 2017 No major design changes have been made to the XL650. The 650 has always had a different style of upper pivot pin from the 550 series. A zerk fitting was added to the 650 upper and lower pivot pins several years ago. The pin design is unchanged otherwise, as it already had a spiral grease groove, and threaded ends for nylock retaining nuts. Link to comment Share on other sites More sharing options...
AbitNutz Posted August 14, 2017 Author Share Posted August 14, 2017 That's good to get from the official source. As good as the forums are they can be filled with a fair amount of misinformation. Link to comment Share on other sites More sharing options...
jmorris Posted August 17, 2017 Share Posted August 17, 2017 (edited) Not sure of the exact date but they changed the frame on both of them. They now have a truss look to them. You would have to run an FEA on the two designs to see any difference though. I'd also bet a nickel they did before the change. Edited August 17, 2017 by jmorris Link to comment Share on other sites More sharing options...
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