02 M/C efi power valves

[diggler]

last winter i had issues with these damn things, i replaced the servo motor and about the only thing left is the ecu, i tied them wide open and it seemed to run pretty good, but what would the right fix be without spending 6-800

 

[Rixster]

if tying them open fixes it then I have a hard time believing it is the ECU. Did you change cables? Are you sure you have the right adjustment? There are 2 different cable lengths. one for 03.5 and newer and one for the earlier sleds.

 

[DCAMPBELL]

black dimond extreeme makes block offs!! no more power valve problems and save some weight! sell for about $200

 

[Idcatman3]

black dimond extreeme makes block offs!! no more power valve problems and save some weight! sell for about $200

And kills your fuel mileage and your mid-range power. But hey, if all you do is wide open running, you're good to go.

 

[diggler]

the servo doesnt even move with the cables unhooked, checked adjustments and they both seem to feel free pulling the cables by hand

 

[Rixster]

I am not sure on a 02 800 efi. But I know that on a 04 900 EFI. the servo doesn't do a self check until 7000 rpm. On a carb model it does it every time you start the sled. I dont know why cat did it this way. Kinda stupid to me.

 

[diggler]

i believe it is something like that on these to, but not 100% sure

 

[diggerdown]

You will need to test your wires from the servo plug to the ecu. If you get all the way back to the ecu and still have no power, there's a good chance its bad. Before you buy a different one try to find one to plug in and try, you could also have a line feeding the ecu thats bad. I don't know if the rpm info is sent to the ecu by the tack or trigger feed.