my engine don't wan to run over 3500 rpm :(

[lloydie]

They don't run well with the airbox lid off! It's like trying to fart with your but cheeks squeezed together ! It just don't work

[bigtwinthing]

They don't run well with the airbox lid off! It's like trying to fart with your but cheeks squeezed together ! It just don't work

Thats an "butt" comparison Lloydie

[lloydie]

They don't run well with the airbox lid off! It's like trying to fart with your but cheeks squeezed together ! It just don't work

Thats an "butt" comparison Lloydie

Now your being anal !! :Lol:

[obimic]

It was looking the vaccum "bushel".
A guy on french VTR forum ask me a video to see if they move identical or differents.

I will you see the result too.

[tony.mon]

It was looking the vaccum "bushel".
A guy on french VTR forum ask me a video to see if they move identical or differents.

I will you see the result too.

Slides, I think we call them, moving together to see if the diaphragm has a hole in one or the other carburettor.
Assuming they do, check the petrol tap diaphragm.
You're just going to have to use Google Translator on those words

[obimic]

Sliiiide !

yes, I use googleT. I miss the correct word.

[Hvornum]

Most definetly a wrong air/fuel mixture issue. I'd bet if you were extremely careful/gentle on the gas you'd be able to go higher on the revs, but it would go unclean as hell and probably ain't good for the engine if overdone.

As people have said, check the vacuum tubes and the carburetor offsets, it has to be within 0-20hg from each other.
If the offset is too big, one cylinder will pull more heavily than the other causing these vacuum percussions. And (I'm guessing here) this might cause the engine to stall on higher revs if again, the offset is too big.

Do you have a vacuum clock or carburetor timing tool?
If so here's a nice guide to check the carburettor settings: http://www.vtr1000.org/phpBB3/viewtopic ... 31&t=14214


Edit: The only reason for "cliquetis" (french for noise clutter/slamming) is if there's to much fuel in the engine when it ignites the fuel. And this can be caused if the carburetor is pulling to high. So check the values on your carbs.
Somewhere i was also told you could test the theory by opening the tank lid and see if it gets worse right away because of a already fuel-rich mixture or if it takes a bit of time because the carbs and vacuum is within good ranges..
But i'll leave that to the more experienced mechanics, just thought i'd throw it out there in case it was true (altho in my head it sounds weird)

[Kurt999]

check the vent tube that comes out of the carb, passing through the side plate and ends up sitting in the space between the carbs. If it's blocked or pinched it will cause this problem.

[obimic]

Kurt: my vent tube are cut . there lenght are 10-12cm

[obimic]

After:

change the carbs units
change ECU & ampli igniter & keys
change sparks plugs
change ignition coils
control 4x the camshafts timings
control 2x the chain tensionner
change vac pipe
change carb pipe


I try an other: change the "top position sensor" (I don't know how you tell "capteur de point mort haut" ).

I make an other video:













wombles SENSOOOOOOR !!!!!



YEEEEEEEEEEEEEEEEEEESSSSSSSSS!!!!!

[tony.mon]

Good news, at last!

Now ride it!

I think we call that part the Throttle Position Sensor- it controls the ignition advance, and fits on the side of the carburettors.

[obimic]

it's not the TPS.

I speak about the sensor inside the engine near the clutch

[obimic]

" PULSE GENERATOR " ( number 6 on microfiche)

[tony.mon]

AH, that part rarely fails, unless you take off the clutch cover and forget it's connected......

Its unusual that the pick up gave you that problem- they should either work or not- it's just a Hall Field generator, I thought?

[obimic]

yes, it's Hall Field Generator.

The connector was good , also the engine can't run without him.