I have just placed my weekly Yamaha stock order and two more parts have now been discontinued for the 84-90 FJ.
Both of the carb end throttle cables #3 & #4 are no longer available from Yamaha.
36Y-26313-00
36Y-2631J-00
There does show inventory at several dealers, but Yamaha is no longer supplying them to the warehouse.
Randy - RPM
No worries..
Contact Motion Pro. http://www.motionpro.com/motorcycle/tools/category/cables/ (http://www.motionpro.com/motorcycle/tools/category/cables/)
They have all the FJ specifications on file. Using these specs, they can also build you custom length cables.
All the end fittings are same as oem Yamaha, they were plug and play... and they do nice work... around $26 per cable IIRC
[edit] ooops, Randy said carb end throttle cables...while I don't see them listed, give them a call with the specs and they will make them for you..