Need Help With Dyna Forks
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Road Master
Joined: Oct 2008
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From: Philippines
Need Help With Dyna Forks
Let me start with an introduction. My name is Bob. Retired military living in the Philippines. I'm a Softail owner and long time wrencher helping a buddy work on his newly purchased 2001 Dyna Low Rider. The original owner is deceased so prior maintenance actions and upgrades cannot be ascertained. We do have a PDF version of a service manual.
We are attempting to change the fork oil but have run in to a few anomalies.
1. The manual gives fork oil amounts in both Fluid Volume = 10.7 ounces, and length measurement (top of oil level to top of tube) = 7.2 inches. However when pouring 10.7 ounces of fluid into the fork tube, the fluid level measurement is 5.25 inches. Yes, the fork slider was cycled and the fluid has settled into all cavities. Experimenting found that a fluid level of 7.2 inches equals roughly 8.5 ounces of oil which in my opinion is to little fluid.
Question: What is the correct amount of fork oil for this bike and can anyone explain these service manual measurement anomalies we found?
2. The springs removed from the forks have progressively wound coils. I believe the springs may be "Progressive Suspension" stock height, however there was no spacer installed. I've used Progressive Suspension springs in my Softails both stock height and lowered and each required a spaces.
Questions: (A) Did Harley ever use progressive wound springs in Dyna's? (B) Does Progressive Suspension stock height springs require a spacer and if so what is the optimum spacer length? (C) What is the required fluid amount if using Progressive Suspension stock height springs?
Any info is appreciated and you can mail me direct at olongapo2@gmail.
Thanks
Bob
We are attempting to change the fork oil but have run in to a few anomalies.
1. The manual gives fork oil amounts in both Fluid Volume = 10.7 ounces, and length measurement (top of oil level to top of tube) = 7.2 inches. However when pouring 10.7 ounces of fluid into the fork tube, the fluid level measurement is 5.25 inches. Yes, the fork slider was cycled and the fluid has settled into all cavities. Experimenting found that a fluid level of 7.2 inches equals roughly 8.5 ounces of oil which in my opinion is to little fluid.
Question: What is the correct amount of fork oil for this bike and can anyone explain these service manual measurement anomalies we found?
2. The springs removed from the forks have progressively wound coils. I believe the springs may be "Progressive Suspension" stock height, however there was no spacer installed. I've used Progressive Suspension springs in my Softails both stock height and lowered and each required a spaces.
Questions: (A) Did Harley ever use progressive wound springs in Dyna's? (B) Does Progressive Suspension stock height springs require a spacer and if so what is the optimum spacer length? (C) What is the required fluid amount if using Progressive Suspension stock height springs?
Any info is appreciated and you can mail me direct at olongapo2@gmail.
Thanks
Bob
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misfitJason
Dyna Glide Models
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Aug 21, 2014 10:36 AM
