HAVE HAD AN 85 FXSB SINCE 1995 ...BOUGH FROM ORIGINAL OWNER WITH ONLY 8000 MILES ON IT / HAVE DONE JUST ABOUT ANYTHING THAT CAN BE DONE TO THIS BIKE WITH THE HELP OF A FRIEND WHO IS A MECHANIC AT A HARLEY DEALERSHIP FOR MANY YEARS .. WOULD BE HAPPY TO TRY AND ANSWER ANY QUESTIONS SINCE I HAVE QUITE A BIT OF INFO ON THE 1985 AND 86 FX