help!! engine problems

[joel30ltr450]

I have a problem, when I run the engine cold run really good but on the second lap the engine run bog and loose the power, I ghange the fuel pump and is the same problem, I change the fuel fuilter and the problem is there, I chanche the power comander too. Please help, I'm from puerto rico and anyboby can fit the problem. Thanks:(

[atveric132]

fuel regulator???? or maybe an injector....i would try the regulator first

[joel30ltr450]

How I know is the regulator run bad? Thanks

[atveric132]

idk if theres any way to pressure test it or not.....if you know anyone else with an ltr swap tanks and see if it fixes your bike then you would know....or just hope for the best and buy a new one.

[atveric132]

i would call a dealership somewhere and see of there anyway to test it

[joel30ltr450]

Really, really I apreciate your help.. Thanks