Results 1 to 8 of 8

Thread: Gas filling with petcock equipped R bikes.

  1. #1

    Gas filling with petcock equipped R bikes.

    Not knowing the internal design of the gas tank, the question is simply-when filling with gas does it make any difference whether the petcock is set to normal or reserve?
    Would you run for a short period with the setting on reserve to get rid of "stale gas', or does all gas flow through that part of the tank anyway? tia

  2. #2
    Registered User lkchris's Avatar
    Join Date
    Mar 2003
    Location
    Albuquerque, NM
    Posts
    6,630
    Not a bit.
    Kent Christensen
    21482
    '12 R1200RT, '02 R1100S

  3. #3
    Grammarian no, Rider yes ISAMEMON's Avatar
    Join Date
    Jun 2006
    Location
    Kings Valley Oregon
    Posts
    1,718
    it will all be mixed on the first bump

  4. #4
    Registered User stanley83's Avatar
    Join Date
    Oct 2009
    Location
    Somerville, MA
    Posts
    270

    Tank Design

    The Airhead tank has a cross section of an inverted "U" with a petcock at the bottom of each side. Each petcock has two input tubes, the long one for "normal" and the short one for "reserve". This allows crap to settle to the bottom of the tank and not be drawn into the fuel system. Hope this helps visualize things.
    Justin in Somerville, MA
    _________________________
    76 R75/6, 78 P200E, 63 VBB
    Lots of bicycles

  5. #5
    Liaison 20774's Avatar
    Join Date
    Sep 2005
    Location
    San Antonio, TX
    Posts
    23,303
    Plenty of petcocks shown on Duane's page to get a sense of the straws that stick up in the tank.

    http://w6rec.com/duane/bmw/petcock/index.htm
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  6. #6
    Registered User
    Join Date
    Jun 2003
    Location
    Northern Front Range, CO
    Posts
    6,663
    and, as has been implied, it is one single large container.
    if you were on reserve, flip to "on" so that you have a reserve to work with after a few more hours of riding. otherwise, you might find yourself pushing the bike to the next gas station.
    Ride Safe, Ride Lots

  7. #7

    Petcock question

    Thanks. All is clear. Now just sitting around waiting for R100RT to be delivered to day.

  8. #8
    Registered User
    Join Date
    Jul 2010
    Location
    Tularosa, NM
    Posts
    666

    Congratularions!

    One of the very best days is the one when you take delivery of a new ride. And, an Airhead???

    Excellent.

    Walking Eagle

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •