Found an interesting solution to petcock problems on a Honda Valkyrie:
http://www.horseapple.com/Valkyrie/Tech ... utoff.html" onclick="window.open(this.href);return false;
Solution is to install a Dan-Marc electronic fuel value: http://www.dan-marc.com/79-afc11112.html
Valve costs $30 plus a little more for fuel line fittings & perhaps a mounting clamp.
When actuated, it draws 3/4 amp.
Link to valve manufacturer: http://www.afcvalves.com/main.html
Don't know if the valves will work for our gravity-fed fuel systems.
Looks promising for the tripples.
Not sure about the twins, their alternators are pretty meager as it is.
Any thoughts or insights?
Anyone know of this being used on a Suzuki two-stroke?
Any other similar solutions?
potential fix for vacuum petcocks
Moderators: oldjapanesebikes, H2RICK, diamondj, Suzsmokeyallan
- jabcb
- Moto GP
- Posts: 4311
- Joined: Mon Dec 13, 2010 4:32 pm
- Country: USA
- Suzuki 2-Strokes: 69 T350 thru 75 GT750
- Location: southwestern Pennsylvania
potential fix for vacuum petcocks
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more
Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
- jabcb
- Moto GP
- Posts: 4311
- Joined: Mon Dec 13, 2010 4:32 pm
- Country: USA
- Suzuki 2-Strokes: 69 T350 thru 75 GT750
- Location: southwestern Pennsylvania
Re: potential fix for vacuum petcocks
T250/T350/T500/ early GT250 vacuum petcocks are still available from Suzuki but they are now around $330.
Manual petcocks are available and it seems like a lot of people like the Pingel, which is around $90.
Turns out Pingel also makes a vacuum petcock that looks like it will work. They have several different designs that retail for about $180. Its pricy but its new and a good bit cheaper than a NOS Suzuki part.
Petcock has On - Reserve - Off.
On is vacuum operated like the Suzuki petcock.
Looks like Reserve also functions as Prime & is not vacuum operated.
Pingel markets then for HDs. Don't know if the vacuum our old two-strokes generate will be enough to active the petcocks.
Has anyone used one? Do they work on our vintage bikes?
Example Pingel:
Manual petcocks are available and it seems like a lot of people like the Pingel, which is around $90.
Turns out Pingel also makes a vacuum petcock that looks like it will work. They have several different designs that retail for about $180. Its pricy but its new and a good bit cheaper than a NOS Suzuki part.
Petcock has On - Reserve - Off.
On is vacuum operated like the Suzuki petcock.
Looks like Reserve also functions as Prime & is not vacuum operated.
Pingel markets then for HDs. Don't know if the vacuum our old two-strokes generate will be enough to active the petcocks.
Has anyone used one? Do they work on our vintage bikes?
Example Pingel:
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BAS (Bike Acquisition Syndrome) - too many bikes but have room for more
Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
- oldjapanesebikes
- Moto GP
- Posts: 3229
- Joined: Sat Feb 07, 2009 12:43 am
- Country: Canada
- Suzuki 2-Strokes: GT750(Jx3,L,M,A,B),T500
- Location: Ontario
- Contact:
Re: potential fix for vacuum petcocks
I see that Z1 offers two vacuum operated models that might fit - they list them specifically for Suzuki, and they have 44mm spacing. Cheap too !

Link to the page is here:
http://www.z1enterprises.com/detail.aspx?ID=1716" onclick="window.open(this.href);return false;

Link to the page is here:
http://www.z1enterprises.com/detail.aspx?ID=1716" onclick="window.open(this.href);return false;

Ian
If at first you don't succeed, just get a bigger hammer !
If at first you don't succeed, just get a bigger hammer !