Air filter won't stay on.

Finally got a chance to get sled out yesterday that I bought a week ago. It's a '99 MM 700 and did well on my 40 mile jaunt.

The only issue is I have three individual air filters at the carbs. The middle one is right against the steering shaft and after a couple miles of riding it always falls off. It's been "formed" to fit there but I can tell it has been an issue with previous owner as the hose clamp is worn out on that filter - can't tighten it down anymore. So I switched hose clamps and got it good and tight on the middle carb, but 10-15 miles later it was off again. Any suggestions on how to handle this?

An update on the sled. I did get an airbox and boots off of ebay that arrived late Friday - had a poker run already planned for Sat. morning, so didn't have time to change it out. I had fixed the middle K&N filter so it would stay on and it did for the entire 40 mile poker run.

But about 20 miles into the run, the sled started running very sluggishly. Could tell it was getting way too much fuel or not enough air. I checked altitude when it started doing this - was 5100 ft. - the weekend before I was running at 4600-5000' with no problem, but I stopped a lot more. So I wondered if the lack of cool air thru the pods was causing the issue and I limped on in to the warming hut. It idled fine, it started right up each time, but it was just bogging down bad - all I could do was just run it around 5000 rpm and putt-putt along. Pulled a plug - it was a bit oily.

So got to warming hut and shut it down for an hour or so. It was basically 10-15 miles downhill back to the truck - I was curious whether there may have been a jetting issue for the elevation and that it may improve as I started going down hill. So we took off - and it ran fine the entire way - didn't need to drop in elevation. The other thing I noticed was the terrible gas mileage - I used over a 1/2 tank for this 40 mile trip while my wife's MXZ 670 didn't even use a quarter tank.

So I concluded the issue was less around jetting and more around the K&N pods and sucking warm air. Sunday, I pulled the pods off and installed the
air box. I didn't pull sled off trailer, but fired it up. What I noticed right away was that instead of clutch trying to engage around 4200 rpm as it always had done, it was pulling on the tie down straps right at 3000-3200 rpms. So I'm hoping to find time this week to run up to where I made the first run with it and just run it like I did at poker run and see if it will bog down at all. We have another poker run of same distance this upcoming Sat. and I'd like to see if this airbox makes a big difference - it sounds like it should?

Interesting - this icing problem - that kind of makes sense to this slow mind. However, it is a '99 MM, and conditions that day were groomed trails - not snowing and about 30-33 degrees the entire trip. I wasn't getting snow or anything else under the hood. When you say "turn the water on", is that some kind of petcock I'd be looking for? I see one petcock on top of carbs on the clutch side, but I'm pretty sure that's the fuel shut off - I didn't look that close, but it came to mind when you mention it. Thanks.

Thanks to both of you for responding - the airbox I got supposedly came off a '99 MM 700 - I do not have or do not see how a petcock/switch was attached to it at all. However, I'll check the petcock I do see above the carbs on the clutch side. I know it was fully open or closed - just not sure which.

What I need to see is a pic looking down at a stock engine for that year....I'll have to look for one.

Thanks again.

Thanks for pics - I do have that tab - wondered what it was for. I noticed something else different - your spark plug wires - they look like that run up to top half of air box?

Yes, the carb heat petcock was mounted on a carb rail with zip ties. I mounted it back on the tabs on airbox. The petcock was and is open...so either it's getting nothing thru the lines or i'm back to simply seeing if installing the air box (meaning cold air into carbs vs. warm with k&n pods) will have an impact on what I originally talked about when it bogged down last weekend on poker run.

Thanks for pics - I'll have to see if I can work on remounting coils and CDI back where they belong.

Looking forward to see if I have "bogging down" problems this Saturday as I did last Sat.