How do I check if the vacuum is good?

[IllusiveStar]

Hello all, I’m new and just recently picked up a 1999 banshee. It’s in pretty good condition and I’ve been cleaning it up as best I could. I was working on it this past week, waiting for parts and a jetting kit so I could re-jet it at the elevation I live at. Got new plugs, new carbs, oil change, air filters, fuel hose like, TORS eliminator kit. Jetting kit and all put together. The banshee is running great now. 

Anyway, the reason why I’m on here, my father in law was asking me what the Vacuum is on it and if it’s in the correct position? Like I said, the banshee is running fine, I just need to adjust the air screw a little bit and change the timing to deliver more fuel. Is there a way to check the vacuum on these quads? 

[375hp banshees]

For?

 

https://www.farmandsandtoys.com/store/carburetor-sync-tool?search=Tools

[375hp banshees]

Or

https://www.google.com/search?q=ba+shee+leak+down.twster&client=ms-android-verizon&sca_esv=969a37d7d8df40c7&ei=TOkWZ8uLENuQwbkPts3CoAQ&oq=ba+shee+leak+down.twster&gs_lp=EhNtb2JpbGUtZ3dzLXdpei1zZXJwIhhiYSBzaGVlIGxlYWsgZG93bi50d3N0ZXIyCBAAGIAEGKIEMggQABiABBiiBDIIEAAYgAQYogQyCBAAGIAEGKIESMJAUOQnWME8cAF4AJABAJgBzwGgAb8JqgEFMC44LjG4AQPIAQD4AQGYAgqgAt4LwgIJEAAYsAMYDRgewgIGEAAYDRgewgIIEAAYogQYiQXCAgQQIRgKmAMA4gMFEgExIECIBgGQBhGSBwUxLjguMaAH1C4&sclient=mobile-gws-wiz-serp#fpstate=ive&vld=cid:fb366ab1,vid:m0YgDVlDW9A,st:0

[Jereme6655]

I’m assuming your father in law is into older cars…..

im guessing he’s asking what your intake vacuum is at……which banshees don’t have intake manifolds which makes running a vacuum gauge for tuning purposes useless.
 

  

[IllusiveStar]

On 10/22/2024 at 3:10 AM, Jereme6655 said:

I’m assuming your father in law is into older cars…..

im guessing he’s asking what your intake vacuum is at……which banshees don’t have intake manifolds which makes running a vacuum gauge for tuning purposes useless.
 

  

Yea that’s what he was asking. I appreciate your response. He got me really confused about it, I thought that these banshees didn’t have a port to check vacuum. So I needed better clarification. 
 

literally, all he asked is what’s my vacuum. Did say anything about placement or anything. Thank you for the info. 

[kawa110]

Remove the air filters.
Use the carb sync tool from Farm and sand toys in the link 375 posted.

The sync tool has numbers. That’s ur vacuum.


Perform a “leak down” test will ensure you do not have any “vacuum air leaks”


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[Jereme6655]

The numbers on the sync tool are not really a technical ported vacuum number. The numbers there are just to allow the user to visually verify the carbs are flowing the same amount of air. 

[kawa110]

^^^correct


If you really want to hook a vacuum gauge up(absolutely not necessary)

You can plumb one into the crossover tube that connects the two rubber intakes that the carbs are attached to.


More so need to ensure you don’t have any air leaks and ensure carbs are pulling air at same rate.


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