nightster front-end fix
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Outstanding HDF Member
Joined: May 2008
Posts: 2,230
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From: Mount Holly, NC
nightster front-end fix
with so many miles on it, my front end had gotten clangy. it would bottom out if you looked at it. something had to be done and it has to be done on the cheap.
i used cheap atf from napa. i used 13 ounces (wet internals), which is slightly more than necessary. so far the ride is pretty good and there is no bottoming out and no weeping from the seals.
i'll put a few hundred miles on next weekend and will report back. so far so good though
i used cheap atf from napa. i used 13 ounces (wet internals), which is slightly more than necessary. so far the ride is pretty good and there is no bottoming out and no weeping from the seals.
i'll put a few hundred miles on next weekend and will report back. so far so good though
Thread Starter
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Outstanding HDF Member
Joined: May 2008
Posts: 2,230
Likes: 12
From: Mount Holly, NC
forty-something-thousand. i used atf because its cheap like dirt and is similar to hydraulic fluid.
i used the heavy duty hd stuff and noticed no improvement in suspension response. i think thinner oil is better when valved properly. the next time i tear the forks down i'm having the damper tube holes braised and redrilled smaller.
i used the heavy duty hd stuff and noticed no improvement in suspension response. i think thinner oil is better when valved properly. the next time i tear the forks down i'm having the damper tube holes braised and redrilled smaller.
Stellar HDF Member
Joined: May 2007
Posts: 3,256
Likes: 522
From: USA
IMHO one can safety add up to 1/2 ounce of fork oil into each tube.
You can use the OEM type fill of Type E (5 weight) OR Harley Heavy Duty (10 weight) AND Screaming Eagle is 15 wt (I gathered the weights from forums)
This extra oil will help with sag.
One may wish to start with a 1/4 ounce see how it "feels" and build up to the 1/2 ounce.
The suspension will also rebound faster with this mod.
I would not recommend more than 1/2 ounce because you may blow out a fork seal, but you could gamble. The real cure is Progressive fork springs.
The service manual offers all the filling capacity specs and how to measure the oil level.
You can use the OEM type fill of Type E (5 weight) OR Harley Heavy Duty (10 weight) AND Screaming Eagle is 15 wt (I gathered the weights from forums)
This extra oil will help with sag.
One may wish to start with a 1/4 ounce see how it "feels" and build up to the 1/2 ounce.
The suspension will also rebound faster with this mod.
I would not recommend more than 1/2 ounce because you may blow out a fork seal, but you could gamble. The real cure is Progressive fork springs.
The service manual offers all the filling capacity specs and how to measure the oil level.
Last edited by Kenny94945; Jun 17, 2010 at 05:06 PM. Reason: Spelling
Thread Starter
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Outstanding HDF Member
Joined: May 2008
Posts: 2,230
Likes: 12
From: Mount Holly, NC
well after a week of commuting, i'm not happy. theres no leaking and no more bottoming out. but the damping is just garbage. i love the speed of the lighter oil but the sponginess is annoying. i'm going to try a bit of spacer this weekend, and if that doesn't help, i'll pull the damping tubes out have the holes braised and redrilled.
i'm still working on refilling the rk shocks. i may be wasting my time though. more to come....
i'm still working on refilling the rk shocks. i may be wasting my time though. more to come....
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May 7, 2008 08:08 AM
