I have an '03 400i 5 speed with 460 miles. I am hearing a popping noise coming from my rear differential area. Sounds like a CV joint problem, but I checked the CV joint closest to the sound and all is well. The bike still rides good, but when I put it in reverse and backup, then let off the gas it pops. Any ideas?

 

Have you rode through any deep water or mud? I had the same problem but it was the CV....so you might consider havin another look at your Boots/cv.....axles get expensive (as i found out) good luck

 

Been through deep water, but that was in the first week I had it. It is a year old now. Curious...what was the problem with your CV?

 

I emailed an Arctic Cat Dealer and here is their response: "It sound like you could have a outer brg in the hub making your noise." What is a brg?

 

i think they mean bearing, lift the wheel, one the side you think the sound is coming from, off the ground with a jack. and see if the wheel is real loose

 

both wheels/tires are solid...no slack. this is frustrating me...

 

Classic symtom of a bad u joint in the drive shaft.

 

there is no rear ujoint.

 

With the wheels off the ground roll them over. A bearing just starting to go bad will be noisy but will not necessarily be loose, just rough. See if one side is noisier than other, feels rougher than the other.

Bear

 

I'll check again...could it be something in the rear diff?