Polaris 250 -89 engine noise

[doublee]

Hi, i have a polaris 4x6 -89 and im not sure if there might be something wrong with the engine.
It makes a kind of scrabling sound like when a rod bearing is bad, but i can only hear it when revving quite high, usually bearing fault is heard mostly on low revs.

Could it be bearings? piston? Or just something loose that is vibrating?

[MarkinAR]

Could be trash on the magneto side of the case, one way bearing on the clutch making noise, might even be something as simple as a heat shield vibrating at a certain frequency generated by RPM.  Can you post a video so we can hear it and maybe help diagnose?

[SashaGraves21]

I also am having this occur, especially when driving for a short period of time. It sounds like it’s coming from my left front tire/cylinder.

[MarkinAR]

@SashaGraves21 If the noise seems to be in the general tire area I would suspect a bad wheel bearing. Bearings heat and expand under use so that probably explains why you hear it after riding a bit. But that's just a guess. 

[SashaGraves21]

! Good point! What do you think is up with the lack of idling it’s like it doesn’t have enough fuel.

[Dion Braud]

2 hours ago, SashaGraves21 said:

! Good point! What do you think is up with the lack of idling it’s like it doesn’t have enough fuel.

Most likely Carb issue

[SashaGraves21]

So the “pig valve” it’s been called many things- is on the left side of the gas tank and it can shut fuel off or turn it on- after I cleaned the carb up, redid my lines, and cleaned out my tank, today it’s working like a champ and idling well! I’ll send a pic, I didn’t put it all the way together bc I am going to rebuild the top half just because everything else was so rough I know the rubber seals are toast. But yay and cheers!!!

[Dion Braud]

Good job!

[SashaGraves21]

I know right!!!! I am so proud, yesterday I thought it was going to cost me a bunch and I wouldn’t be able to get it back together. This site helped me find a manual and also got me reading what other people see. I noticed the brand is irrelevant compared to the years the machines were made in. 

[MarkinAR]

There's not much of anything you can't do yourself with a little time and research. Good work. 

[SashaGraves21]

Yeah I’m a teacher so i get 10 weeks off now. Thank goodness.

[Dion Braud]

[SashaGraves21]

Dude now it won’t shift into reverse without dying. I swear I’m gonna kill this little trail boss!!!!

[Savage3]

Check for reverse safety switch on your model in manual. Most likely short to ground, kills the spark.

[fireslayer]

It's a 2 stroke . They make a lotta noise. LOL