Synchrometer for carbs

[JD5]

Hello to all and thanks in advance for any and all input.
This may sound like a stupid question but I'm wondering why no one here has used the snail type Synchrometer to sync the carbs at the air box? I realize one is upstream of the carbs and the way everyone here seems to do it is the bench method or vacuum gauges from the intake nipples.
I've used my synchrometer on my 2002 Honda ST1100 at it's airbox with good results, is their a reason why it won't work on my stock 99 Valkyrie ?
Thanks again, John.

[Chrisj CMA]

I dont know enough about what you are talking about to say if it would work on a Valkyrie, but if you have to run the engine and have access to the airbox then you have to have an alternate fuel source while the tank is removed.  Seems like a lot more work even if it works.  Access to the intake runners is easy.

[LB]

I think it's because no one wants to pull the fuel tank to sync the carbs.... It's the only way to get to the airbox.

[Harryc]

Agree with Chris. I think it takes me maybe 5 minutes to hook up the Digisync and have it reading vacuum.

[JD5]

My bad, I should have mentioned I'm knee deep in rebuilding the carbs, bumping up to the 38 pilots, replacing float valves blah blah blah so the airbox will be staring me in the face. I have an I.V. type gas bottle which are great by the way. I used it to try and mix different cocktails of techron and seafoam to try and clear the pilots before I took the plunge. Well I'm post plunge and dog paddling for my life over here. It's a bit spooky committing to a carb rebuild on one of these especially when suffering from C.R.S.
Thank you guy's for your responses. This board has been an excellent resource of knowledge and I would never attempt this without it. I would also like to give a special shout out to the series of youtube video's posted by D-RAY. I thought they were done very well and extremely helpful !
Thanks again guy's, John.

[1NorthRyder]

I used those D-Ray videos when I rebuilt my carbs last winter and it worked great. I have a digi sync so that part was pretty easy. I did the desmog and ecm mod and do have some minor popping on the exhaust but the bike is running much better this year.