Talking about a 1000 SP more and more often when I start it up and when I shut it down the thing backfires, not every time but enough to notice, know someone with a standard 800 who was starting to get the same thing. Anyone else been getting this

Had a zl 500 that did the exact same thing. I know that they are a different motor, but i wouldn't worry about it.

My 2001 ZR-800 and my xfire 800 do it. The ZR would blow your ears off. I read somewhere that its vapor still in the can being sucked back in the motor? There's over 10,000 miles on the ZR so I'm not worried.

Have 3 1000's . they all do it, the midrange and idle fuel is soo rich that the unburned gas in the pipe flashes off in the pipe when you shut it down, either get a Boondocker to lean out the low to mid fuel or let it idle for a minute to allow the pipe to cool enough that it can't ignite the unburned gas.

what motorsport said.....let it idle down for a while

if your machine is a choke job then give it a shot of choke before you shut it off. Or just sit for a while and let it idle down and burn the extra fumes out before you shut it off.

My M7 does it to let it idle down before you shut it down.

Guys, the 1000 is NOT rich in the middle. Lots of guys are ADDING fuel in the middle to richen them up. Don't be taking fuel away without doing some testing....unless you like new pistons.

I agree with cmscat50. DO NOT take any fuel away in mid-range. Just do what the other guys said. Just let it idle for a minute. And my zl that does it has over 10000 miles on it. Its fine.

We have three 07s. (f6, f8 and cf8) All three do the little whoomph, after shutting down sometimes. Mostly after long fast runs. The cf8 has another issue though. Long wot runs produce flames. Big flames. Coffee can sized balls of flame that continue while it is sitting at idle. This happens after running a couple of miles at wot. We could run at 70mph forever and no flames. But we could not get the sled to not shoot flames if we ran wot for long runs. The temps were in the mid 20s on the trail. Right now the dealer is stumped.

Also this same sled shut down at 14 miles out of the box. Plugs were fouled on mag side. But the shutdown was instantaneous, like a meltdown. It does seem to bog sometimes, let off the throttle and punch it, comes back to life.

Sitting at 400 miles in dealers shop right now. Ski well belly has a hole burned through it. Almost lost the sled. Started to burn around the exhaust while we were sitting on the side of the trail with enginge off. That was before we knew about the exhaust flames. Then we watched to see the cause.

I will disagree with you on this one, Cat has 2 1000 calibrations one for the CF and one for the F. The CF is way richer than the F in the mid and way leaner on the top end. I have a Boondocker on one of my CF1000's and are running neg fuel up to 6500 RPM, -7 @ idle and now I don't have a smoke storm and it does not backfire when shut down. We had 2 CF and one F on identical rides 2 weeks ago in West Yellowstone and the F consistantly burned 15-20 % less fuel than the CF's.

Yeah I have a crossfire 1000 and I just went snowmobiling last weekend and I noticed it to but I also noticed it takes a second for the idle to come down so when you stop try letting the machine idle briefly before hitting the kill switch. I did that and that seemed to stop the backfiring problem.

07 XF 800SP will sometimes backfire when shut down. Buddy with F8 does the same.

I agree... 2 motors to show for it. ECU is finally being remapped. It is pig rich on the bottom... 07 XF1000 std.

Have you figured out what the issue is with the 800 my 1000 is now a flame thrower since we finally got some snow. I will be droping of to dealer after this weekend. could the flash fix this. Just don't want to burn the whole belly pan of.
jd

My M8 runs perfect with no bottom end issues or backfires on shutdown-My buddies X8 backfires one out of 5 shutdowns and has alil burble down low on takeoff-it seems to be a hit or miss issue as far as ecu programing and fuel supply goes-some are affected and some are not-

Hope to know soon. We are heading to the UP on Monday. Dealer could not find anything else. So, we hope it is just a reflash issue. AC has said to give them a call if anything is wrong. They are interested as well, I guess.

well I got my ecu reflashed and its ready to go, riding this weekend so we'll see if it runs any different

I've read blogs on Snowest about several people having flame throwers! One guys sled caught on fire and the dealer gave him a new sled, then the new one started doing the same thing. Read some of the threads in the Snowest Arctic Cat section. It sounds like a ECU problem; hope you guys get it worked out with Cat.

Just wondered how the sled ran after the flash. my dealer is sending mine in today. Is you motor seem to be shacking more mine seems to be time for a complete lookover when I get ecu back.
jd

My ECU is going in for a make over as well.
I got a wicked black mark down the side, so the plan is to back off the oil pump too.....
Dealer says if the cowl is burnt/melted below the exhaust, A/C replaces it... Mine has melted right below the metal shield.

seemed to run the same as before, no big gas consumption change or performance difference. Backfire is still there it ended up being a competition between me and the guy with the crossfire 8 to see who would get the loudest bang at each bar

Rode for the first time after reflash on the cf8. This thing is still buring the belly pan. It gets so hot that the plastic in the locking screws is melting out. The front suspension is going to start falling apart. Cat tried to drop rpms with weights in the primary. Rpms went from 8160 on the peak to 7960. They are now 77g weights. I am getting damn frustrated. This is the third trip this year that has been wasted at the dealer trying to get the problem fixed. Dealer back home has no snow, so they can not run it after trying fixes.

favoritos: I was at my dealer onTues. getting my front motor mount tightened up and someone called him and said he had an xf8 shooting flames the lenght of the belly pan while riding near Mass City. He stated that he had his reflashed. About an hour after his call Cat called my dealer and said the rider was taking his sled to Hurely, Wi.rather than bringing it to him. The Cat tech wanted to talk to my mech. because my pan is melting also. Tech said as of Tues. there is no reflash for the 8 but are working on it as they spoke . He did not say what action to take so Iam going riding. If she burns up ,oh well . Winter is to short and it seems to me Cat is awful slow about this issue with the 8 and1000.

That was me in Mass City. We were staying in Wakefield so we tried to find a dealer closer to our room. Is your pan melting around your exhaust protector plate? If it is, check for flames after long, wide open runs. If you have flames, they will start the plastic on fire after some time. They are still not sure what the cause is, or what to do about the problem. Have your mechanic pull the exhaust and look into the Y pipe. My plugs look good but the Y pipe tells a different story on mine.

Mine has some melting onthe plastic next to the frame,about3" long by 1" wide. the outside of the plastic is now yellow not orange by the sheild. I had the pipe off Mon. and checked the cylinder walls and they are black like tar. Y pipe looked good. I'm on my third set of plugs at 600 miles. If I let my sled warm up for more than 1 min. she'll foul a set. Dealer is reluctant to turn down the oil pump . I'll be doing a ratio test this weekend and adjust the pump myself if he won't. I belive less fuel at idle will solve my fouling issue but the wide open flames could be a different story. Wondering how you got a reflash when the Cat tech told my mech. ther is not a current flash but are working on it. I hope they figure it out as I love the sled but will jump ship if not solved shortly.

I have the same problems at idle as well. It loads up like crazy if I let it sit and idle for any period of time. I ride with a f8 guy and the oil isn't a whole lot worse than his, but he can let his sit and idle forever. Mine does use about a gallon or two more of gas on every tank.

The plastic you are talking about is now gone on mine.

The first picture is from outside and you can see where the edge of the belly pan had been sealed to the bulkhead. The second is from inside the hood. It is hard to see, but the view is straight down and you are looking at daylight through the hole in the pan. There was aluminum tape on the outside, but the flames burned right through that also.

Mine looks the same but not as bad. I also put tape to see if this will slow down the problem but am sceptical. Going riding today will see if it helps. Hope C AT GETS THIS FIXED SOON. i AM NERVOUS AS IT IS LIKE DRIVING A TIME BOMB. COME ON CAT LETS MOVE!!!

I agree. I thought they had it fixed the first few times so we took off riding. I can tell you that I now have no faith in this sled. The holes are getting so large that the flames are now in the engine compartment. I can't see if they are shooting out while driving fast so I don't know when it's going to completly blow up. I just don't want to be in the saddle when it goes. I'm also a little concerned about the heat stress on the frame and suspension.

Yooper, check your inbox.

Calling dealer mon.. Going to give him and Cat 2weeks to fix or am going to get rid of it. I also am nervous in the saddle as yesterday right foot got hot but could not see if flames were present. My frame tubes next to the can are yellow now and also the stabilizer is seeing a lot of heat along with the a-arms and bushings. Are the bushings brass or plastic? If so they should be deformed from the heat also. As I stated before, if someone (hopefully nobody) gets injured because of this problem there will most likely be a huge lawsuit against Cat and you know what that means.

Your dealer may be able to help us because you actually live where the sled can be ridden. Tell him to take it on trail 3 East of the firesteel bridges. Start out from Mass City to get it warmed up. Ride WOT until the trail has to stop at M28. The flames will be shooting out while it is sitting there idling.

I had noticed that my right foot was warm as well. I didn't know why until we first saw the flames. I still do not know if it flames while running fast, but I know about the flames at idle.

I think the stabilizer bushings are plastic, but I have not seen any dripping out of the tube. I know that Cat was going to replace anything that could be potentially damaged. Right now I'm worried about the metal losing strength from all the heat. These sleds can not be safe with these issues.

We have 3 2007 Cats this year and this may be the last. The other two guys are getting tired of waiting for me to get this thing looked at on every trip. They are just as frustrated with Cat.

i got 1800 miles on mine and this last week after running 90 to 95 for 20 miles it stated throwing flames when we stopped now i can put my hand in between the exhaust and the frame this really bites because i had polaris for 10 years and never had any thing like this happen this is my first a/c and might be my last if they dont get it fixed

Call Cat. Call your dealer. We have to get this fixed.