Running a sx with the stock intake and a pro curcuit pipe and as I get up to elevation and the motor gets covered in snow the bike won't idle....sometimes... As I come back down the hill idle gets better, but seems like if bike gets blasted with snow idle goes rich??? I have the thermostat installed with a small hole drilled in it to keep pressure down but seems when temperture drops on the head the ecu dumps fuel into the motor. Is anyone else having this problem with these bikes or am I the lucky one. Thanks
Idle problems with 13 sx450
- Thread starter the gman
- Start date
R
Rush44
Well-known member
So far I haven't experienced this and we change as much as 3,000ft a day. I've rode it in super cold conditions, rain, ultra deep powder.... not so much as a hiccup (unless it was running on it's side and died, floods a tad when that happens). I'm going to do some more stock airbox work to it since I saw Randy's bike when we rode yesterday and mine was stuffed full of snow and his was nearly spot free.
So far, in the winter, the 13 450 SXF has been all I hoped it would be. I just need my LT and rails to ship so I can float in this deep powder a lot better.
So far, in the winter, the 13 450 SXF has been all I hoped it would be. I just need my LT and rails to ship so I can float in this deep powder a lot better.
The same thing happened to the one in our group last year. Scary when you run the battery dead trying to start it and you ten miles from a road.
Get your temperature up and the problem will go away. Are you still running the dobeck?
Get your temperature up and the problem will go away. Are you still running the dobeck?
What are your water temps when this is happening? I doubt that you're the only one having issues, you're just the only one willing to admit it.
I would really focus on maintaining 170+ water temps next ride out. Block the radiators or whatever it takes...
Have you ridden this bike in the dirt? Did this happen then?
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Teal I think you are correct. My temp gauge is out of order right now,broken wire. Yes I broke this bike in this last summer, no problems, but we have other 13 sxf s running at priest lake without this problem, and mt doo and rush run in colder temps than I and claim no problems. What bike had problems last year and did you find a fix??? My problem is the bike will start and idle good when it is 10 degrees out,run good up the hill,then go way rich up a bit at elevation, come back down and idle fine, then when I get up in elevation will idle rotten again and when I come back down idle fine again. I am not sure if elevation, or better snow conditions, colder motor is the culprit. Sounds like a bad map sensor but they are too expensive to replace just to see. I do have a 1/8 inch hole drilled in my thermostat so the bike doesn't run as warm as some but I know of one bike without a thermostat that does not have a idle problem. Like I said in other posts fi is great......when it works.....
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mtn-doo
Well-known member
Hope that gets figured out Gary? Dang... There are several sxf 450's here and they run perfectly. Not one glitch. Several of us out in handlebar deep pow again Friday. Starts perfectly, idles perfectly, rev's to the moon in 3rd and is an amazing machine. DirtRider threw a leg over it and said it was as good as the KX500 Monster last year.
We rode several 13 sxf 450's last year and they were the most trouble free bikes we've rode. That is why we bought new ones this year.
Don't give up Gman, It will get sorted out? Something is not right? We will post some vid's on the sxf soon.
We rode several 13 sxf 450's last year and they were the most trouble free bikes we've rode. That is why we bought new ones this year.
Don't give up Gman, It will get sorted out? Something is not right? We will post some vid's on the sxf soon.
Randy did you talk with the ktm rep yesterday? Any ideas? Seemed like my bike ran better a priest lake last week when it was colder, and now I am at revelstoke and it doesn't seem to have as much snort. Am going to take it back to dealer and have them check it all out again. Just at 100 bucks a visit this is getting spendy.
It sounds like a fuel issue. Try adding some gas line treatment. Turn up your idle as well.
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funjunkie
Member
If it idles bad all most of the time I would try this warm the it up then spray the air temp sensor with brake clean and see is it idles up and smooths out. If it does it has a clogged injector and is running lean. The only reason I'm saying this is had this happen once. It took awhile to figure out what the heck was going on. It idled bad and seemed to run ok on the top end. You can take the injector out and blow it out backwards to clean it out. If it does not idle up when you spray brake clean on the air temp sensor then that is not the problem. This is just something easy to try.
The bike I was referring to is a 13 450sx. The first couple of rides last winter it would have a hard time idling, by the end of the day there would be so much fuel in the oil the bike would hardly run. The fix - at least in his case, was to keep the motor temp up.
The same bike has been running good this year, but was problematic last year.
Have you checked the in-line fuel filter? His was dirty at one point during the season last year, he uses a tank filter now.
I am running a afr gauge to see what's going on and bike idles about 12 when idling good, then when idle goes rotten afr is off the gauge rich, 9 or below. The intake filter and sock is clean. Rode yesterday in neck deep powder in revelstoke and seems to be elevation sensitive. No fi light when it goes rich just decides it wants to waste fuel. Going to take it in to the dealer see if they can sort this out one more time. Anyone have any other thoughts?? Thanks
Didn't realy measure it but was 6 feet plus. Rode keystone,sale and boulder and no base yet. Saw alot of stumps sleds had hit ect. Warmed up yesterday so maybe will base up but cold temps last week put down one hell of a houre frost layer. Christmas should be fantastic.
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mtn-doo
Well-known member
hmmm? That is strange? I have 3 rides and no oil change. Still center of the sight glass. Allen and I were visiting last night about it and his stock 501 just finished the 4th ride and has not changed his oil. Same inverted efi system.
Did you install the map switch? That will run your AFR's way down... Stock map is leaner and run's 12.8 ish at altitude. Perfect number
At the time it was a 100% stock bike, stock mapping, straight from the showroom. It's not my bike, but the guy I ride with. Strange that some have issues and some don't, his behaved no different than any other fuel injected bike. If it was too cold, it would over-fuel to the point where it would not idle and fill the oil with gas.
This year he has an engine cover, thermostat, pod filter, FMF exhaust and a PCV with auto-tune, he also blocks his radiators as needed to maintain temps... It fires right up and runs perfect now.
They have a fuel filter in the line right at the quick disconnect, think you need a screw to pull it out.
I have a friend with a 13 501 XCW and his filter is constantly picking up water or schmoootz from the tank, once he cleans the filter he's good to go till it plugs again. Yesterday he was going to pull his tank and try to flush it.
I have a friend with a 13 501 XCW and his filter is constantly picking up water or schmoootz from the tank, once he cleans the filter he's good to go till it plugs again. Yesterday he was going to pull his tank and try to flush it.
What about this....with the thermostat with a hole drilled in it it flows enough fluid to keep the stat closed....get to deep powder and jump off trail and work the motor hard enough to open thermostat...super cold water enters motor and ecu compensates with a rich mix??? Damm FI...thinking too much. Bikes at dealer so hope they find SOMETHING. Is everyone running a thermostat?? Hole drilled?? If someone would check ohms on the cylinder sensor mine was 4.50 ohms at 70 degrees and .645 at 170ish. Air intake is about the same at 70.
