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No final drive breather cap

Discussion in 'XJ Technical Chat' started by Laces, Mar 12, 2018.

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  1. Laces

    Laces New Member

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    Location:
    Moses Lake, Washington
    Bike: 1981 Yamaha XJ 650
    I just did a walk around on my bike for the first time this year and noticed I don't have a breather cap on my final drive... Is this a common part that I can buy from a power sports store?


    I swapped the tires out just before the end of the season and don't remember my bolt being that oily... I'll have to clean it and check it periodically once I find a breather cap to narrow down the source of oil leakage...
     

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    Laces, Mar 12, 2018
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  2. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

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    We do have these in stock, please send us an e-mail for all of the ordering/payment/etc. information:

    Final Drive Breather Valve:

    At the very top center of your shaft-drive rear wheel housing, there is what looks like a grey plastic cap----which many people mistake for the oil filler plug. This cap is really part of the housing oil BREATHER VALVE, and luckily, it almost never needs replacing unless it somehow gets damaged. If it does, replacement valves are available below. Note that these valve "press-fit" into the final drive housing.

    HCP6228 OEM final drive housing BREATHER VALVE, for all XJ650 models except Midnight Maxims and 1983 XJ650 Turbo, all XJ700 models, all XJ750 models except Midnight Maxims, and all XJ900RK, RL, N/FN, and F models.

    HCP6227 OEM final drive housing BREATHER VALVE, for all XJ650 Midnight Maxim, 1983 XJ650 Turbo, XJ750 Midnight Maxim, and XJ1100 models.
     
    chacal, Mar 12, 2018
    #2
  3. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    The source of your leakage is the missing breather valve.
     
    k-moe, Mar 12, 2018
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