1996 polaris indy 500 efi

[ratmn218]

this machine sometimes on takeoff is really doggy,was wondering if needs injectors cleaned? what is a good injector cleaner ,or was thinking maybe a temp sensor bad, giving it a wrong mixture from brain box?any way to test sensor? also maybe a throatle safty switch malfunctioning,how can i bypass that?

[mnwild]

I have a 1996 600 XLT that does the same thing. I can let it run for 10-15 minutes and it bogs down or like you said doggy then eventually takes off and sound how it should.

I hope people respond because I am cusrious to what can be done.

[chad austin]

I just bought a '97 ZR440 and this is exactly what my sled was doing, called a buddy of mine and he said to check the jack shaft bearings and sure enough they are bad and are getting changed tomorrow.

[ratmn218]

anyone ever had problems with throttle safty switch?

[Gus]

anyone ever had problems with throttle safty switch?

That is something to check. I had mine get stuck one time and I did have issues almost like you describe on an 92 indy 500 efi. Mine was just iced over though from a messy snow storm. I guess thats what it is there for however my throttle itself wasn't stuck. Just the sensor. I wouldn't know how to test any more through besides making sure that pin can move in and out, sorry.