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  1. #1

    Join Date
    Jul 2011
    Upstate NY

    GP1200 Fuel and Oil line sizes

    I am looking to replace the oil and fuel lines on my 99 GP1200. I don't know what size to buy.. the stock lines are not labeled with sizes.

    The fuel lines all look to be the same size to my eye.

    There seems to be two different size oil lines. There is a bigger line that runs from the tank to oil pump. All the other lines appear to be smaller.

    Anyone know what size lines to buy? Is there a different grade line for gas and oil?


  2. #2
    Yamaha artisan Cutlass's Avatar
    Join Date
    Oct 2010
    Madison, WI, USA
    The stock lines are metric. The big oil supply line is 7mm inside diameter. The little oil lines are 3mm or 3.5mm ID (can't remember exactly).

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