Subject: RE: Stupid newbie question #1, petcocks
Author: Greg Bender
Date: Jan 26, 2005, 6:34 AM
Post ID: 1718276515
Hi Randy,
I'd love to see pictures of these, if you have 'em. If not, don't
bother. Thanks!
greg @ thisoldtractor . com
ranjan wrote:
AJ I have a 67 V700 with original tamedicks, (petcocks) that do not have any perforated tubes on either side. These petcocks have flip levers mounted horizontally that have only 2 positions, on or off. As Greg stated you use the left one as main tank, and the right as the reserve, acct. of the tank tunnel acting as a separate reserve tank area. I think that Greg's left petcock tube with higher perforations could possibly give you a 2nd reserve if there actually was a reserve position on the petcock, similar to BMWs of the time. If I run my R90/6 like my 700, I get 3 reserves. First I run the LH cock on main, 2nd the RH cock on main, then back to the LH for reserve and finally the RH reserve hoping the gas station is in sight. I've never ran out yet, with this much low fuel warnings and a 6.8 gallon tank. Oh! my aching butt!! Randy Wilson SE SoDak 67 V700 97 R1100RT 75 R90/6 68 Shovelhead I'm getting tired of 'renching! too many, but not for sale 51 Panhead 72 CL 350 79 DT 80 (street legal) 82 XT 550 (not running yet) ----- Original Message ----- From: "Greg Bender" <gr-@thisoldtractor.com> To: <Loopfram-@topica.com> Sent: Tuesday, January 25, 2005 5:16 PM Subject: RE: Stupid newbie question #1, petcocks Your free subscription is supported by today's sponsor: ------------------------------------------------------------------- Find out how you can get a Free Gateway M320X Series Laptop computer! It has a $1299.99 value but can be yours Free! http://click.topica.com/caac6MFb1dfltb6364ma/ProductTestPanel ------------------------------------------------------------------- If you are lucky, AJ, you have either one of the two common petcocks that Guzzi used. One type is chrome plated, and the other type is alluminum. Both have square bodies and with a little handle/lever that turns. Now, on to how most of them operate... When functioning properly (that is, no leaks), the petcocks I described above are either "on" or "off". There is no "reserve" position (more on reserve, later). If all is right with the world, the 6 o'clock position should have the fuel moving through either petcock. Either the 3 o'clock or the 6 o'clock positions will close the fuel supply. About reserve...later models (starting with the 850T, I think) used petcocks with three handle positions "on", "off", and "reserve". Moto Guzzi used a different technique with the loop frames. Essentially, there is a tube that is affixed to the top of each petcock (stuck up into the tank). The tube is perferated with holes so that the fuel can flow. On the left petcock (in the stock configuration), the holes in the tube did not start until part way up the tube. On the right petcock (in the stock configuration), the holes in the tube go clear to the bottom. The idea being that you turn the left petcock on and run the bike. Once the fuel level goes below the perforations on the tube, you turn the right side petcock on and beeline for the nearest petrol station. This design requires that you have a "cross" installed between the fuel lines so that one petcock feeds both carburetors. As Patrick mentions, there are many aftermarket varieties that have been installed on a lot of the loops, so you really don't know what you have until you take a look. To the best of my knowledge, the above information is correct. However, the wise members on this list will certainly correct my errors. Good luck! Patrick Hayes wrote:
Regards, Greg Bender 1971 Ambassador 2000 Quota http://www.thisoldtractor.com/gtbender Your free subscription is supported by today's sponsor: ------------------------------------------------------------------- Like music? Get a CD player on us. Click here. http://click.topica.com/caac48Rb1dfltb6364mf/PermissionData ------------------------------------------------------------------- |
Regards,
Greg Bender
1971 Ambassador
2000 Quota
http://www.thisoldtractor.com/gtbender