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Thread: Big Twin flathead transmission oil loss

  1. #11
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    Re: Big Twin flathead transmission oil loss

    ...and this is the puller/installer tool, do you want shots of it in action?
    Click image for larger version. 

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  2. #12
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    Mar 2006
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    Re: Big Twin flathead transmission oil loss

    Here are the pushrod seals, one in the shaft and one (sprung loaded) in the clutch hub nut. Have no experience or hands on knowledge of the sprung one, later nuts have a usual modern seal, the one in the end of the mainshaft is cork (not used in later bikes).
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  3. #13
    Join Date
    Jan 2008
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    Re: Big Twin flathead transmission oil loss

    right heres a quick fix and it works ,,, both my bikes had a small leak on the tranny ,

    i bought REDLINE V-TWIN TRANSMISSION OIL 70-240 w well its made the gear change sweeter and NO LEAKS


    JOHN
    (old iron ass)

    Royal enfield winter hack
    1978 FLH80 SHOVELHEAD
    1950 EL hydra glide PANHEAD

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