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1998 Fatboy Fork Rebuild Oil Capacity and type ?????

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Old May 2, 2017 | 11:13 PM
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Default 1998 Fatboy Fork Rebuild Oil Capacity and type ?????

Hello,

I am rebuilding my forks and I am wondering what is the "dry" capacity for stock forks? I asked three dealerships and all three gave me different answers. 9.8, 11.2, and 11 ounces.

Also, I am told to use type E and from best I understand it is 20wt oil. IF I move to 15wt will the ride quality improve on abrupt shallow pothole type road situations?

Thanks in advance for your help.
 
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Old May 3, 2017 | 08:25 AM
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Bump, anyone?
 
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Old May 3, 2017 | 10:30 AM
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I just redid the forks on my 94 Fatboy and I want to say it was just over 11 oz. I can take a look in the service manual tonight to verify. I also went with some 20wt HD fork oil.
 
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Old May 3, 2017 | 12:41 PM
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Shepa, thanks for the reply, please let me know...
 
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Old May 4, 2017 | 12:40 PM
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Not sure if its the same forks as my Deluxe, but I just replaced my factory springs with the progressive drop-in lowering springs. Funny, the manual called for 11.5 oz of fork oil, but the bike only had 8 oz. I replaced it with 11.5 oz like the manual called for.
 
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Old May 4, 2017 | 08:47 PM
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This was from my 94 Fatboy manual

 
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Old May 4, 2017 | 09:17 PM
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Originally Posted by shepa401
This was from my 94 Fatboy manual

This. Dry means the forks have been disassembled, wet is for a drain and refill. Type E fork oil is pretty thin oil, more like ATF. I use HD "performance heavy" with much better results.
 
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Old May 4, 2017 | 09:51 PM
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Type e is 5w. The weight of the oil essentially controls the dampening. I like 10w cause I'm light. My dad at 200lbs uses 15w.

 
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Old May 5, 2017 | 11:54 AM
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Originally Posted by Uncle G.
This. Dry means the forks have been disassembled, wet is for a drain and refill. Type E fork oil is pretty thin oil, more like ATF. I use HD "performance heavy" with much better results.
The 1996 Service manual for the FatBoy Flstc/F/N list the same amounts as above
 
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