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Petcock with off position?

  • Thread starter Thread starter MrZig
  • Start date Start date
Why exactly is yours still leaking even with the tractor valve put in place?? The tractor valve has a very clear on/off switch, and when it's in the off position there is no way that gas is going to be flowing through the valve.
 
Gimpdiggity said:
Why exactly is yours still leaking even with the tractor valve put in place?? The tractor valve has a very clear on/off switch, and when it's in the off position there is no way that gas is going to be flowing through the valve.
Click to expand...

It's not leaking through the plumbing, it's leaking through the actual turning-knob-selector.

See the part to the immediate right of #2 in this picture: http://www.cmsnl.com/img/partslist/fuel-cock_bigSUE0046FIG-38.gif

I replaced the rubber seal around it and it slowed the leak down, but when I wiggle the selector it feels really loose. The screws are tight, too. Although I did round their heads off a bit. Basically gas is coming out of the front of it and dripping down.

Screw it, I'm not going to **** around and I'll just buy the OEM petcock for the 400. It should last as long as I own the bike and I know it was built for it.
 
MrZig said:
It's not leaking through the plumbing, it's leaking through the actual turning-knob-selector.

See the part to the immediate right of #2 in this picture: http://www.cmsnl.com/img/partslist/fuel-cock_bigSUE0046FIG-38.gif

I replaced the rubber seal around it and it slowed the leak down, but when I wiggle the selector it feels really loose. The screws are tight, too. Although I did round their heads off a bit. Basically gas is coming out of the front of it and dripping down.

Screw it, I'm not going to **** around and I'll just buy the OEM petcock for the 400. It should last as long as I own the bike and I know it was built for it.
Click to expand...


Ah, I see.

I'd say it's time for a new one. I just got my GS, and even though I'm not sure if it NEEDS a new petcock, I'm ordering one for it anyways.

In my opinion, it's better to be safe than sorry.
 
"Low-rent spanky bodge"... That's awsome, bwringer.

Anyway I just bought an nos in the suzuki box at a suzuki dealer in Youngstown Ohio, for 47.00, just 3 months ago.

unfortunately I'm still starving for fuel... I need a high flo after market.

besides the point! Do some more searching online...
 
Mr Zig...get a late 90's (or compatible) RM250 petcock. You have on/off/reserve. No vacuum control and no doubts about when you turn the thing to "off". Also only about $20.
 
...wait, that's assuming the petcock for the GS400 has the same flange pattern as the 78 and 81 GS750's.
 
makenzie71 said:
...wait, that's assuming the petcock for the GS400 has the same flange pattern as the 78 and 81 GS750's.
Click to expand...

Would the 250 petcock flow as much fuel as the 400 though? I wouldn't want to starve it for fuel at high rpm's/WOT.

And that's the thing, I can't be sure if it's the same flange. hmm.
 
Those 250's put down more power stock than your 400 has even the potential of creating...plus, petcocks don't really come in that many sizes. You'd be hard pressed to find one that wouldn't flow enough fuel for the biggest of the GS'.
 
Spyder said:
Anyway I just bought an nos in the suzuki box at a suzuki dealer in Youngstown Ohio, for 47.00, just 3 months ago.

unfortunately I'm still starving for fuel... I need a high flo after market.
Click to expand...

You have other problems besides the petcock.
 
zig...kinda botched that...you want RMX (street legal RM) or RMZ (4-stroke) because they're the ones with the reserve.

Mine doesn't have as sharp a shape to the base...I'll double check the year...but I know it's from an RMX250.
 
makenzie71 said:
...if I were having issues I wouldn't be suggesting it.
Click to expand...

Lol I know I'm just confirming that it was the bike you were running it on.

Well I think that's the valve I'll grab then. Cheaper, and has a manual off selection to boot.

Holy crap is the one fuel intake part tall though.
 
I can't remember if I had to swap the screens out...I'm thinking I did because my RMX piece didn't come with a screen, iirc...but the petcock on my bike wasn't stock, either...so that part is a gamble, I don't foresee you having issues, though.

Biggest thing is make sure your bike has a 44mm petcock bolt pattern.
 
makenzie71 said:
I can't remember if I had to swap the screens out...I'm thinking I did because my RMX piece didn't come with a screen, iirc...but the petcock on my bike wasn't stock, either...so that part is a gamble, I don't foresee you having issues, though.

Biggest thing is make sure your bike has a 44mm petcock bolt pattern.
Click to expand...

44mm, is that the distance in between the two mounting holes?
 
yes...center to center...it's hard to measure without proper tools so if it looks like it's anywhere in that area within a couple mm then it's golden. Odds are it's the same, but I don't want to guess.
 
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