Sled going down on DET. Help please

[AKSNOWRIDER]

Ok..this has been an issue before..you are clutched too light..you need to check max rpm on memory(read the manual it tells how). the guage cant keep up with the motor in some situations and even though it shows..83-8400 you are actually hitting the rev limiter..hit it hard enough and it goes into limp mode..the 11 series weights will work fine but when installed you need to check belt side clearence in the primary..you want .010-.020" clearence between the belt and sheives, any less and it will creep on idle, any more and it wants to start in second gear...add weight till the motor pulls 8150 max on a hard climb at your max elevation, down low you will either have to baby it a bit or swap weights if the elevation change is that much...also run it in non ethanol position if you run non eth fuel.........

 

[Zrider]

Mickyd:

I've got the exact same issue on my '13 800 RMK. Took it out last Sunday for a break-in ride. Did 32 miles and it went into Det mode 5 times. It always did it right after I gave the flipper a quick hit for 1-2 seconds. First time it happened I thought I fouled a plug, then saw all the bells and whistles going off on the dash. Sled ran fine till I punched it, then Det mode. Pulled the plugs and they looked good. Not oil soaked or white. Light tan developing on the porcelin.

Could be a bad batch of gas, to much oil in the gas(which can actually cause a lean condition), bogus TPS, etc. etc. My dealer wants me to run it again and if it continues, then he wants to see the sled. Not the way I wanted to start a new ride.

Never once saw Det mode on my '11 Pro.

 

[mickyd32]

I ran 10-68s in my 11 and felt I could have used a little less weight when pulling hard. Thus the reason for starting with the 11-66s. As far as tolerances and all that jazz, I will check it when I do the clutching changes.

The seamfoam goes in every tank (small amount) just because some of the places I ride to, fuel quality is a know issue. I have run like this since my 03 rev and never had an issue that was fuel related that was caused by the seamfoam in the tank.


As far as the comment about over revving and the situation of rpm dropping low, then spiking again because of terrain and so on, seems to be right on par with my issue.

When I am near WOT, let off, then go back to WOT, I get the DET. The last time I saw it happen I was watching my RPMs and saw 8400 on the gage, I discounted overrevving as I didn't think 8400 would be enough to register the rev limiter. However if what people are saying and there is gage delay, I am probably actually seeing much higher RPMs than the dispaly is reading, so I will start with some simple clutching

As for the max rpm recorder, I know it was also on my 11 and tried to access it the same way I always have, just cant seem to find it. I will revisit the manual as per chance they have changed something between 11 and 13 in accessing this function


thanks all

 

[AKSNOWRIDER]

Z... try adding a little weight to the primary...even if these weights worked in your 11 with the lower inerta of the quick drive it maybe too light for the 13..these sleds like weight in the clutch, we tried back to back, side by side test on the 11's when they first came out..66's would not go as high on the hill when side by side to a 68 sled..even though the 66's were pulling 8200 vrs 8050 for the 68s....

 

[Oregonsledder]

Z... try adding a little weight to the primary...even if these weights worked in your 11 with the lower inerta of the quick drive it maybe too light for the 13..these sleds like weight in the clutch, we tried back to back, side by side test on the 11's when they first came out..66's would not go as high on the hill when side by side to a 68 sled..even though the 66's were pulling 8200 vrs 8050 for the 68s....

AK, Zrider has the standard RMK, not belt drive. Z, didn't mean to speak for ya.

 

[Zrider]

AK:

I'm clutched for 6-8000'. 62's are the ticket around here. I've never had any over-revving issues. Once I get this sled broken in, I can hit some good pulls on the slopes and see what kind of R's it's holding.

OS:

You can speak for me anytime. Old dudes need all the help they can get. Thanks.

 

[mickyd32]

I changed my weights out to the 11-68s last night, as recommended for my elevation. Fit was good, didn't have to do any shimming, weights actually weighed the same (or about as close as I was going to be able to make them myself anyhow), and the test ride went well


I tried to duplicate the scenario where the sled was previously going into DET mode, tried for about an hour, never happened once. So either it has magically disappeared or I was actually hitting the rev limiter before. I'm going to hope it is scenario B

thanks all

 

[AKSNOWRIDER]

when you check it Z, use the memory, and do it a few times..we have had issues with the guage not keeping up with the motor, but the memory showed it hitting the limiter...at 3500-4400 ft (4-6000ft running 64 gram BB's) mine will hit the limiter at 1/2 throttle almost every time, once we get over that 4400 ft level, it never does it.........going to slp MTx weights and loading heavy in the belly and light on the tip seems to help with it as well.......

 

[AKSNOWRIDER]

Another thing to keep an eye on that will act like over rev/limiter... make sure the throttle lever has almost zero slop...if it gets loose it will act just like someone is hitting the kill switch off/on/off as you ride, there is an in line adjuster on the cable right at the bars...........

 

[Zrider]

AK:

Thanks for the info. Was planning on eyeballing the dash on some pulls and then check the memory to see how they compare. Had to adjust some cable slop on my '11 Pro. Will check things out after my next ride and see if the T-cable has stretched any. OK for now.

 

[SSABMUD]

Had this issue last year with my turbo. If the clutch does not have enough weight and you are seeing 8400, then guaranteed you are in over rev which is 8500. The engine only needs to see that rpm for a split second before it shuts you down. If it were mine and I has riding low elevation, I would throw a faster shifting helix at it. Load the engine with the clutch. If it is going high elevation throw weight in the primary. Another thing to check is the primary spring. I broke a couple last year and it will act very erratic on the top end.