Hi All,
I just purchased a 1995 Xplorer 400 4×4 which is my first liquid cooled Polaris ATV. After bringing it home discovered that there was no oil in the counter balance. In fact there was no CB drain plug. Unfortunately, this is the first time I had even heard about counter balance oil because my Trail Boss 250 and 300 do not have it.

I don’t know how long it was driven without a CB plug or CB oil. This ATV only has 755 original miles. But I don’t know how quickly the CB is ruined without oil. Probably in minutes I am guessing.

So I added oil (10w30) ran it a bit in neutral and drained the oil. Did this two more times until the oil came out clear. Then added 4.5 ounces of synthetic 10w30 oil.

But the engine seems to shake a lot at idle even with the counter balance oil when compared to my 300 which feels much smoother at idle.

I have a feeling that the Counter Balance is toast and am looking for suggestions and ideas on what to look for. Your input is greatly appreciated.

Thanks all!