95 m900 cuts out at high rpm

[motomike]

 i have a 95 m900 i got as a basket case i got it running and when i ride it hard it it feels like runs out of fuel. this is what happens it starts great, idles great, and thottle response is great when i ride it slow,low rpms like 2000 it runs good. when i open the throttle wide open and take off in 1st gear pulls hard untill i get into 2nd then it dies out like no fuel intill i let off on the trottle then it comes back. i tried riding in 3dr gear at low rpms then roll on the throttle does the same thing when the rpms get high like 3000rpm. things i have done clean the carbs, new fuel filter, new fuel pump rebuild kit, new non vacume operated petcock and new fuel lines with no kinks.         

does the fuel pump work from the intake vacume? thats how i have it and i think when it gets into high rpm it would be just a stedy vacume not a pulse like it needs to operate. is there any specs on the fuel pump like psi or flow rate? does the pump need to hook up to the crank case for a pulse like i have seen in the past with other bikes?

[ducpainter]

Are the plugs black?

It sounds to me like the slides are not lifting...

you've covered most of the other bases already.

[Howie]

The fuel pump is hooked up correctly.  Like ducpainter said, start with pulling a plug.  Any history on the bike?

[greenmonster]

Fuel line from filter in good shape, nice round bend on it?
Mine started to go soft in the middle, caused a thinner passage f fuel.
Symptoms just like yours.

[Howie]

Also check the fuel line from the pump to the carbs.  They get soft and collapse.

[Capo]

Definate symtoms of fuel starvation, if the slides were not lifting, the engine would not rev much above 1K.
As others with FHE have said, check your fuel lines - that rubber has been in contact with fuel for 13 years.

[ducpainter]

Definate symtoms of fuel starvation, if the slides were not lifting, the engine would not rev much above 1K.
As others with FHE have said, check your fuel lines - that rubber has been in contact with fuel for 13 years.

I have to disagree with your slide comment.

The slides in the cv carb are directly related to fuel delivery as well as air.

Most fuel delivery problems related to restricted flow appear after periods of high rpm operation as opposed to not ever running over a certain rpm.

Those aren't the OPs symptoms...My money is on the slides not operating properly.

[Capo]

You are correct, I'm 'pre CV' 

[motomike]

the plugs look lean and the fuel lines are new with no kinks and the slids are moving up and down with rpm i also checked for vacuum leaks none. the bike had been crashed so it ran good before the crash and the guy i bough it from was going to fix it and pulled it apart and lost intrest in it and sold it to me so i had to replace the frame and now im here not knowing what to do i just wont to ride it its my first ducati. the only other thing is that when i replaced the fuel pump kit it got a little better so thats why i thing its a fuel problem.

[ducpainter]

the plugs look lean and the fuel lines are new with no kinks and the slids are moving up and down with rpm i also checked for vacuum leaks none. the bike had been crashed so it ran good before the crash and the guy i bough it from was going to fix it and pulled it apart and lost intrest in it and sold it to me so i had to replace the frame and now im here not knowing what to do i just wont to ride it its my first ducati. the only other thing is that when i replaced the fuel pump kit it got a little better so thats why i thing its a fuel problem.

Are you running an airbox?

[motomike]

yes i have an air box it has a k&n air filter but the lid has been cut out  i guess for more air flow

[ducpainter]

Are you sure it ran right before the po crashed it?

[Speeddog]

Are you sure it ran right before the po crashed it?

+1.

Also, make sure the diaphragms are fully seated all the way around.
If the top covers are off for a while, the diaphragms shrink a bit, and it's really hard to get them fully seated.

If you rev the engine with the air filter off, do both slides open similar amounts, and does it look like the same amount of fuel is coming out of the jets?

If the bike is backfiring at all... be very careful about looking down the carbs...

[greenmonster]

the plugs look lean

Just to b sure/isolate the problem:
Unhook fuel line into carbs. have a small container under hose, run starter a few secs.
It should pulsate quite freely.
If so = it's carb related, not fuel delivery.

[motomike]

so i found out that the fuel pump is working good. i took apart the carbs they are mikuni 132. i looked at the jets the main fuel jet is 70 and the main air jet is a 50 the needle is on the 4th clip from the top. doent look like the stock one maby it has a jet kit in it. the pilot fuel jet is a 40 does any one know if the jets i have are close to what i should be running and any one know how to identify my engine to tell what cc it is the title says its a 900 just wana make sure it not a 750 or 600 thanks.