This subject has been brought up before. If you guys want to get a scare, remove the breather tube from the intake snorkel and shine a flashlight down it. You will see that your wonderful Raptor motor has been injesting dirt/sand or whatever. (inside of the hose will be coated with crud) This engine creates a huge discharge/suction pulse that WILL pull contaminated air into the crankcase. Remember the guy that posted that his engine failed and the dealer found evidence of silica in the motor oil? How do you figure it got in there? I don't know why Yamaha overlooked this problem, but I'm just glad I caught it after only 5 hrs. of operation of my motor! I am rerouting the hose and putting on a breather filter, asap! K&N makes a nice filter that slips right into the hose and will solve the problem. Hope this helps all of you avoid unnecessary grief with damaged motors.

 

Scott,

Can you tell me where I can purchase the breather filter? Like you, I have about 5 hours on my machine and I would like to take care of the problem now before it's too late.

Thanks

 

I am also interest in this filter. Do you have a part number?

 

Try James Lucky or Dennis Kirk.

 

What size is the hose? White Brothers sell crankcase filters that fit hose sizes 3/4, 5/8, 1/2 and 3/8. I haven't receive my Raptor yet but I would like to get the filter ordered.

Help!!!

 

The hose is 1/2", i bought my filter at bap import parts. its a breather filter for a vw.
just remember when you take it to the dealer,remove the filter. yamaha told me that it will possibly void the warranty.

 

The Warrior is designed the same way. I put a k&n breather on mine. $9.00 at checker auto. Just my $.02..... All of you raptor owners need to call your dealer and/or yamaha to complain about this design flaw. If the wheel doesn't squeek, it doesn't get fixed! Zebratrailer can tell you who and where to call at Yamaha.

 

Thanks for the info!!!

 

Has any one heard of this problem on a Kodiak? Is it the hose that connects to the side of the air snorkel on the top half of the air box?

 

I think every ATV ive known to have looked over did not have a filter on it and had an open hose, I assume its not as big a problem as you guys think. The main concern is that you should change out the oil very often anyways, but if your sucking sand thats a different problem, Usually the crank case vent is just that, a vent of the lowerend. But to be safe just stretch some fine filter material over the hose and zip tie it or clamp it.