[Cody Lee]

I have a k4 GSX-R 600 it will only rev so high under load in gear. For example, I could barely get it to 90mph on the highway due to lack of power in the mid-range/upper rpm.

 

[1Slowrider]

More like a riddle. Fuel flow test.....

 

[Cody Lee]

More like a riddle. Fuel flow test.....

I'm thinking the fuel filter

 

[1Slowrider]

Usually the high pressure internal filter.

 

[Cody Lee]

Usually the high pressure internal filter.

That's the filter in side the fuel pump ain't it

 

[1Slowrider]

Hence "internal", but yes. Very pricey part. Do the flow test to confirm. In a repair manual, or Youtube.

 

[peter079]

Is there any "FI" on the dash?

 

[TheGeek]

Yup... do the fuel flow test.

 

[Cody Lee]

Is there any "FI" on the dash?

Yea I had a F1 light on but I have no power at my switch at all