2010 dyna fork oil change
Cruiser
Joined: Dec 2015
Posts: 118
Likes: 24
From: virginia
My dyna came with about 10k miles, so wanted to refresh all fluids. I pulled the front wheel, fender, brakes and forks in short order, no sweat at all. Hardest part was to use service lift kit and jack it up. Both forks had just about what the book said in oz, so just replaced what I took out. But, I will say that my main issue was stiff front end with original oil. I measured the vis of some of the oils, and replaced with just under 10 wt oil. Made a huge diff in suspension. Next time I will use 7 wt in these big forks. The original heavy wt oil was too stiff for me. But , the whole process was simple. Note that trying to pull and replace the caps in place is not so simple.
The level of the fork oil is measured with the springs and spacers removed and the slider fully compressed. Add some fork oil then pump the slider to be certain all air is removed then set the level; measure from the top edge of the fork tube.
The 49mm fork tubes on the Wide Glide use 29.4 ounces of fluid, 3.74" from the top edge of the fork tube.
The 49mm fork tubes on the Wide Glide use 29.4 ounces of fluid, 3.74" from the top edge of the fork tube.
Road Warrior
Joined: Dec 2010
Posts: 1,629
Likes: 46
From: East Hartford, CT
When and if you use the 12v marine oil pump you can easily pump both at once, no real need to dissasemble. try it.
The angle of the tubes isn't going to do squat just don't over fill it cause you will be locked. I found out the hard way.
The angle of the tubes isn't going to do squat just don't over fill it cause you will be locked. I found out the hard way.
Last edited by stilup; Jan 30, 2016 at 07:57 PM.
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Road Captain
Joined: Dec 2009
Posts: 550
Likes: 8
From: Syracuse, NY
regarding overfilling
here's a tip i found on another post:
with about 2 foot of clear 1/4"hose, mark your measurement. (black marker) drop end of hose into fork and align mark at top of fork tube. this put the end of hose into the tube. suck------no oil, add. too much oil and you can suck a little out at a time till you get no more oil in your hose. you can just overfill the tube a little and suck out excess, leaving you at your measurement you made on the hose.
with about 2 foot of clear 1/4"hose, mark your measurement. (black marker) drop end of hose into fork and align mark at top of fork tube. this put the end of hose into the tube. suck------no oil, add. too much oil and you can suck a little out at a time till you get no more oil in your hose. you can just overfill the tube a little and suck out excess, leaving you at your measurement you made on the hose.
Road Warrior
Joined: Dec 2010
Posts: 1,629
Likes: 46
From: East Hartford, CT
yes, I also used a brake bleeder suction with the line lowered just right amount.
Works just fine.
Better to a tad less oil in then more and have them equal.
Wth my spring kit I ended up taking an inch off the preload spacers to soften the ride some.
Used larger tubing cutters to cut them clean.
Works just fine.
Better to a tad less oil in then more and have them equal.
Wth my spring kit I ended up taking an inch off the preload spacers to soften the ride some.
Used larger tubing cutters to cut them clean.
Last edited by stilup; Jan 31, 2016 at 07:11 AM.
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