2003 DM 1000s.i.e. no power on full throttle

[lyolikusa]

works fine on low rpms but when im trying to open full throttle its dosnt go more then 4-5k rpm please help

[zooom]

how much fuel in the bike? last time the fuel filter was serviced? last fill up was when?

[lyolikusa]

its not it i check it. some times its just start working good fore a second. i think its some sensor

[lyolikusa]

i can send you a video if you can give me a email

[lyolikusa]

my gas tank is from 2005 S4R

[Travman]

I had a similar problem with a 2006 620.  It became worse and eventually it wouldn't go over 3-4K RPMs. Turns out the fuel pump was bad.

[Howie]

Also check for bad fuel hoses in the tank.  Open the fuel cap while the bike is running.  Is there fuel spraying around? 

[lyolikusa]

any other problems can cause that problem?

[Howie]

Simple stuff first.  Filter is maintenance anyway.  If there is mileage on it replace it.  At the same time you can check the hoses.  Or you could start with the high buck items first and, after spending a lot of money finding you had a bad hose.

[Slide Panda]

Simple stuff first. 

Occam's razor. Like howie said, start simple. and go from there. Clogged, damaged hose, kinked hose or a dying fuel pump could cause your issue. Like how said, it'd be a shame to drop a few hundred when it was a $1.50 problem

[lyolikusa]

inside of gas tank hoses is good any other suggestions?

[Slide Panda]

Did you check the external ones? Replace the fuel filter? Check the filter pick up screen in the bottom of the tank?

[chris1044]

For my own knowledge because I'm too lazy to walk to the garage and look...do these bikes have a schrader port to test the fuel pressure at?

On a car, one of the first things I'd do is check fuel pressure and volume. 

[lyolikusa]

Every thing is good most likely its a some sensor

[lyolikusa]

just fixt it it was throttle position sensor (TPS)