2001 aprilia mille spluttering between 3-4 tho revs

Hope you have fixed this as I note that the thread is nearly a month old but if not I hope this is helpful.

I'd suspect it has been over oiled, as I had the same symptoms when I purchased my bike.
The previous owner thought he would be helpful and "top up" the oil when the engine was cold.

The excess oil will find its way the air box and be ingested by the engine, for me I started getting a misfire between 3-6k

Or throttle bodies need setting up after being sat for a while?

Give it a service get it set up

Hi Everyone,
i've got a same sort of a problem.
I've got a 2007 RSV Mille R Factory.
as it appears when the machine is started there is no problem. When i take it out for a drive, it will go into a emergence loop (2,5k - 4k rpm max.) af about 2 kilometers. The EFI and oil pressure sign will show up.
When i start the engine and let it run warm at stationary it' won't have a problem at all.

For this the oil pressure sensor has been replaced and all went well....
But after 3000 kilometers, the problem showed up again.....

As i tried to pinpoint the problem i mentioned they the problem occurred when the cooling system is in its lower temperatures (72 - 79 Celcius). I drove with my bike for hours, in the mountains on passes. The engine was on a good working temperature. But when i drove away on the highways, at high speed, the engine cooled down. It went cloudy and the climate was frisk. The cooling systems showed 72 celcius,
I stopped for fuel, and after filling it up and tried to take off again, it again went in emergency loop. EFI, oil pressure sign, and wasn't able to rev above 4k.
After 2 minutes of stupidly revving the machine up and down, it accidentally popped above 4k and at that point i was able to drie away.

Anyone an idea ?
somehow it is a sort of sensor problem combine with the cooling temperature... i think ....