250F Problem with idle and oil out of breather hose

When i start the bike cold the fuel pressure at idle is 43 psi but after i rev the bike and gets hot is settles at aprox. 47 psi, at idle, is this normal?
Don’t know what the specs are, but I’d think that would be sufficient. You have stated that you have idle issues, if it was a low fuel pressure problem I’d think your problem would be even worse when riding the bike under load. I noticed you haven’t stated if the bike runs well off idle.
 
Don’t know what the specs are, but I’d think that would be sufficient. You have stated that you have idle issues, if it was a low fuel pressure problem I’d think your problem would be even worse when riding the bike under load. I noticed you haven’t stated if the bike runs well off idle.
No, it does not run well, sometimes it stalls and dies if i give it some throttle. The manual states that the idle pressure should be 43 psi. I am buying a new pump. I hope i will not have to replace all parts on this bike :)) Already spent so much money. Sometimes it also pops when i rev it
 
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No, it does not run well, sometimes it stalls and dies if i give it some throttle. The manual states that the idle pressure should be 43 psi. I am buying a new pump. I hope i will not have to replace all parts on this bike :)) Already spent so much money. Sometimes it also pops when i rev it
I know you said in your initial post that the head was done buy a shop. With new valves and seats, but did you ever measure the valve clearance yourself? Everything that you were saying kind of sounds like a valve Clearance problem.
 
The valve clearance is in spec, i checked it twice, no tight valves. I hope is fuel pressure problem and a new pump will solve it. If not i will take to someone who repair bikes because i had enough of this. The problem is we don't have in the area an experienced repair shop for dirt bikes and i am afraid to spent money and have it not fixed properly. I also hope is not the ECU because it is like half the price of the bike and i will be forced to dismantle it and sell it for parts.
 
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