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Noob looking for some help...

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Old Aug 17, 2013 | 04:31 PM
  #1  
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Default Noob looking for some help...

Just bought my bike about a month ago, I want to change the transmission & primary fluid. I wanna switch everything to a high quality synthetic. I just don't know what weight to use. What are all of your recommendations ??
 
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Old Aug 17, 2013 | 04:46 PM
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Lots of threads to search on what kind to use but generally its gonna be a 20w-50.
 
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Old Aug 17, 2013 | 05:04 PM
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I use 20w50 in the engine, 75w140 for the trans and synthetic gear oil for the primary. The thicker trans fluid helps with smoother shifting. Not sure if it helps but that's what I've always used.
 
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Old Aug 17, 2013 | 06:05 PM
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I've real good luck with M120W50 in the engine oil , M1 syn gear lube in the trans, and SYN3 in the primary. This is on both Dynas. The Syn3 is a bit pricey these days so maybe the newer primary oil from HD might benefit you. I personally think a gear oil would be too thick in the primary and there could be difficulties on cool mornings.
 
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Old Aug 17, 2013 | 06:58 PM
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Stick with Harley in Primary & Trans. I'd go with SE3 for engine. Works good for me.
 
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Old Aug 17, 2013 | 08:25 PM
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No need for synthetic in the primary. Waste of money. 10w40 weight works fine. I also use gear oil in tranny and 20w50 in crankcase.
 
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Old Aug 17, 2013 | 11:07 PM
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2001. FXD

ROYAL PURPLE 20/50 motor
Mobil 1 20/50 syn primary
REDLINE SHOCK PROOF HEAY Trans.

Like they said , do a search. Everyone will go back and forth.
Just try to go with a red colored tranny fluid so if u get a leak u can figure it out easier IMO.
 
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Old Aug 17, 2013 | 11:16 PM
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ynots's Avatar
ynots
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mobile 1 20/50 motor (walmart)
Formula + primary
redline shockproof v-twin in tranny
 
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Old Aug 18, 2013 | 03:35 PM
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Thank you all.... I ended up doing Mobil 1 gear oil in trans and Mobil 1 v twin 20-50 in the primary. Appreciate all your help!
 
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Old Aug 18, 2013 | 10:04 PM
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Amsoil 20-50 engine
Dyno trans/primary fluid in primary

amsoil severe lube 70-90 in transmission
Amsoil severe lube 70-140 transmission in my pro street.
Amsoil AT in the primary in the pro street.
 
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