What carb do I have?

[scrambler]

So Keith, when you say turn it off when parked, do you mean set it on the on position?

[KEITH KRAUSE]

So Keith, when you say turn it off when parked, do you mean set it on the on position?

To avoid the possibility of fuel passing through when the motor is off you need to move the lever to off position. If the petcock is operating as designed then the on position would also not allow fuel to pass in the absence of vacuum.
But I would use off position. No chance of fuel passing through even if the petcock diaphragm fails to seal (in your case/running non-vacuum carbs).

[scrambler]

There is not an off position on this petcock.
it has On, Reserve and Prime. so in this case, on should serve as an off position, once I seal up the vacuum side, correct?
Scrambler.

[Steve]

Correct. You could actually use RUN or RES.

.

[Nessism]

There is not an off position on this petcock.
it has On, Reserve and Prime. so in this case, on should serve as an off position, once I seal up the vacuum side, correct?
Scrambler.

True that! No off position. Keith has been drinking Kawasaki koolaid so long he forgot.

[Adler]

Awww, why didn't MY bike come with expensive performance carbs...

Also, I like the idea of using the vacuum port for syncing them as a vacuum line to the carbs... Should work splendidly.

[scrambler]

Thanks Guys, I do appreciate all the help and advice, and going out of your way to give it.
this is a truly great website.
Scrambler.

[81GS750]

How about buying a thread in vacuum port nipple, similar to those used for performing a sync job? Screw it into one of the threaded sync ports in the cylinder head.

+1 for that idea. That's how I plan to run mine on the 750.

[Spyderman]

so you have the 29MM smoothies
well i run them on my 1000 and i just run on prime all the time i installed a little shut off valve in the fuel line that i turn to the off position when the bike is not in use this way i never have fuel leak into the engine should the needle and seat fail to stop the flow
it also serves as a nice anti theft deterrent no fuel no go
here is a pic

[KEITH KRAUSE]

There is not an off position on this petcock.
it has On, Reserve and Prime. so in this case, on should serve as an off position, once I seal up the vacuum side, correct?
Scrambler.

I'm sorry. No "off". Been living with a Pingel.
"On" would work fine to shut it off. You have a vacuum operated petcock. If operating correctly the petcock won't flow unless it's in prime position. My point is to not let it stay in prime when you park because it's possible fuel could still pass through under certain conditions. So I'd treat it like an on/off petcock. "Prime" when riding and "on" when not.

[KEITH KRAUSE]

True that! No off position. Keith has been drinking Kawasaki koolaid so long he forgot.

Yes. Between the 14 having no petcock and my GS using a Pingel, I've forgotten my roots and become too hi-tech for you Neandertha.......uh, I mean guys.
The manifolds port would work fine too if the petcock thing is too complicated. Seemed simple to me though.
Use a good fitting/better quality material hose though because the manifold gets hotter than you may realize.

[KEITH KRAUSE]

Wonder if the smoothies are jetted right?





Now I did it.

[scrambler]

Yeah, I'm definitely splicing in an extra shut off valve first thing.
I put it all back together an rode it a bit to see how it ran. the 4 into one has leaks, I'll have to weld up. the carbs seemed in good synch, but don't seem to to be shutting off quick enough between shifts. any ideas on that one guys?
Scrambler.

[Spyderman]

Wonder if the smoothies are jetted right?

here's a clue for you as to why they don't shut down fast enough between shifts
also be sure you have both the push and pull cables hooked up to the carbs as the smoothies need both cables to be sure they close when the throttle is shut down

[scrambler]

Thanks, what are the correct jets?
Scrambler.