Join Date: May 2010
Location: Calgary, Alberta, Canada
I see some real misinformation here so I'd like it help clear it up.
Blinker fluid should be changed every 3 years regardless. Those that use the synthetic DOT5 fluid like to use extended service intervals but that's up to them.
Always use winter or at the very least all-season air in your tires if you ride in the winter. I don't care if it's warm where you are all year round, air should be changed out at least once per year with all-season air, or twice per year as winter turns to spring and as summer turns to autumn. That is unless you keep the bike parked all winter, then just a quick air change in the spring with new summer or all-season air is okay.
Muffler bearings are best left alone unless you intend on just replacing them. You'll know when they need replacing, but it has been my experience that trying to service them almost always accelerates the need to replace them. If you suspect that this is the year, then just replace them with the highest quality muffler bearings you can find.
Not yet mentioned is headlight fluid. This lasts much longer when you convert to LEDs (less heat, lower wattage). Use synthetic there and you may never have to change it with LEDs.
There are, of course, differing opinions on all of this. Some people just use ATF for everything, but I tried it once in place of summer air and the bike rode like a brick. It smoked a lot too when I lubed the muffler bearings with it, the headlights had a distinct reddish hue, and the blinkers often just skipped blinking altogether so I'm not sure how other people are getting it to work, but my opinion is to use the right parts for the job. Just sayin'.
Oh, and HOP, I have reconsidered and will try the latest synthetic blinker fluid next service. Will report back with findings.
'12 Road Glide Ultra, Kuryakyn Alley Cat intake, Jackpot Super Duals header, Jackpot HiRoller mufflers, PV Tuner, Daymaker LEDs