carb balancing with manometer problem

[Old Git]

Tried to balance carbs with manometer today, bike is running fine, but is nearly time to check so.....
Already had pipe from front carb to make it easier to connect without removing all fairing, gauge straight onto rear carb.
Now, front carb oil level falls, back carb rises right to the top of the 3ft. manometer, can't see it being that far out so have not adjusted it yet.
could it be an air leak on the front carb existing hose that is causing such a huge difference in the gauge???
Bike starts & runs fine, so can't see it is out far if at all, but want to check it so it is all by the book.
Can anyone enlighten me if a leak on the hose on the front connection would cause this???
I should have taken the front hose off & connected direct to the carb nipple, but run out of time.
Any ideas.

I'd imagine there's another fault somewhere, or your tube isn't on your front carb properly.

[embee]

Are you using the fuel tap vacuum connection from the rear carb or the fuel pump vac connection?

If it is still restricted, I seem to recall that the fuel pump vac tapping will be below the restrictor washer whereas the other tappings (the one on the front carb and the fuel tap from the rear carb) are above the washers. I may be wrong on this. Just a thought.

[Old Git]

Originally Posted by embee

Are you using the fuel tap vacuum connection from the rear carb or the fuel pump vac connection?

If it is still restricted, I seem to recall that the fuel pump vac tapping will be below the restrictor washer whereas the other tappings (the one on the front carb and the fuel tap from the rear carb) are above the washers. I may be wrong on this. Just a thought.

As per haynes manual pics, so both front & back connections are above the restriction, yes the rear connection is onto the fuel tap connection directly onto the carb.
So, since they are both above, any other thoughts???
Guess next best idea is to remove the rubber extension on the front carb tap & see if fitting directly to the nipple solves the problem, i.e. maybe the rubber extension has a split/hole & not creating vacuum.?

[northwind]

I don't know the cause... I'd just like to say Ba ba badaba (Manometer) Ba bada ba (Manometer) Ba ba badada badada badadadadada.

[Spanner Man]

Good afternoon all.

Try doing it again, making sure the gauges are connected properly. You would be surprised at how healthy an engine can sound when the carburettors are out of balance. Ask Alpinestarhero, his carbs were at least a week out, but his engine sounded fine. It was only apparent that it wasn't ok after I balanced his carbs.
Also make sure there are no air locks in your gauges.


Cheers.


P.S. Really Northwind, that was pretty poor even by your standards.

[Old Git]

Originally Posted by northwind

I don't know the cause... I'd just like to say Ba ba badaba (Manometer) Ba bada ba (Manometer) Ba ba badada badada badadadadada.

Poor ain't the word! took me ages to work out wha the fork it ment, only twigged this morning in the shower!!!!
Don't even ask..............

[northwind]

Everyone's a critic.

[embee]

Bear in mind that using an oil manometer (do do dadoodo) is about 20 times as sensitive as a mercury one ................

Originally Posted by Old Git

Poor ain't the word! took me ages to work out wha the fork it ment, only twigged this morning in the shower!!!!
Don't even ask..............

It's all in the pronunciation! If you are retarded, like me, you'd be trying to work out what song has "man-o-meter" in it.