m1000 surging wot

[slomo]

having a odd problem with my m1000 surging like hitting a rev limiter at wot
it is a 2008,full speedwerx exhaust,jaws can,pcv,it runs perfect untill 3/4 throttle if i go past that it starts to surge or studder,also have 85g weights in as of today running at 2000 ft,things i have looked at so far,grounds,removed pcv and put stock pipe back on still doing the surge thing,reinstalled speedwerx exhaust and pcv,rechecked tps calibration on pcv
power valves clean and not sticking,also pv cables good and not off of the pv servo if i hold the throttle at 3/4 this thing screams if i push past that its surging so is it posible that the tors switch it bad or tps?

 

[Devilmanak]

Go through the clutches, sounds like they are fighting a stick or something. (Sticking, then free-ing up, then sticking.) Just a guess. At what point did it happen? Figure out what you changed on the sled to make it happen (if anything) than go there.

 

[slomo]

400 miles on it,new weights as of today,secondary new and tried the stock one as well,removed primary spring and checked primary clutch completly all ok there as well,keep the suggestions coming please

 

[markoo]

What rpm are you running at full throttle?

 

[slomo]

7700 ish and drops to 6900,if i hold it pinned it surges up to 77 down to 6900 but if i hold it 3/4 throttle seems fine and pulls 7700

 

[Mike from langley]

I've got the same thing going on. I've only been out twice so far and conditions haven't allowed a good pull up hill in deep. I do notice that it seems to go away once I'm up at altitude. Down at the launch point is 2-3000 feet lower. I've got reeds and full exhaust and running stock set up in clutches. I'm thinking I need more weight down low? If it pulls clean up high this weekend I might leave it. Sound reasonable?

 

[slomo]

that is why i put the 85g weights in as im at 2000 ft,but at 3/4 throttle it rips,i wonder if it is going into fail safe mode from a bad tps sensor but no dtc,or can a bad tors switch cause this? throttle cable too tight cause this?but i have not made a trip to the hills yet and dont want to bring it running like this im going monday to mcbride and want to have this thing rippin
racinstation helped alot and we have eliminated the 6000 rpm bog that i couldnt pull through but now this,i refuse to give up as i think this thing will be a ripper once this is fixed

 

[DPalmerM10]

High side of stator could be weak, mine was, did same thing. Dave.

 

[diggerdown]

Borderline stator, fuel pressure, or TPS would be where to look.

 

[Devilmanak]

Did it run fine before you messed with the cluthing? If so, you are loking past the obvious and need to go back to where it ran well. If it ran well on Saturday, you changed clutching Sat night, and it ran poorly Sunday, then looking at anything other than clutching is looking past the obvious.
Sounds like over-revving to me. (Badly.) If it pulls 7700 at 3/4 but won't take any more throttle after that, throw more tip weight in it.

 

[slomo]

no same thing before i changed clutching,this sled is new to me as of late last year and just trying to get it to run right,it only has 400 miles i dont think a stator would fail that soon but i guess its possible

 

[Daltech]

Seen stator failure on M1000 before 2000km. So might be possible. There are 2 stators. One for low rpm, and one for high rpm.
Friend of me had the same issue as you are describing, and it was stator issue.
If you can find the repair manual, you will find how to measure the stator.

 

[WyoBoy1000]

Just thought of this.

Check to make sure the plug wires havent warn through and arcing to a ground, also make sure the plug caps are screwed into the wire all the way. If you don't have extra motor mounts your clutching wont work right but also when you give it the power the engine will pull backward and possibly pull the plug wires or cap back against the steering post or bulk head etc... then arc out on a ground. it makes sense as 3/4 throttle wont pull the engine has hard letting it shift better.

Every M I have owned has warn the plug caps or wires, every m1000 needs motor mounts. My engine moved far enough on my 09 that if you pinned it down the trail around 78mph the belt would climb over the primary and explode, that gives you an idea of how far it moves. I usually run the wires where they are not touching anywhere then black tape them together and it will kinda hold them in place, but still wont stop the motor movement.

 

[slomo]

checked the wires cut a 1/4 inch off and put the plug boots back on as one was loose,no rubbing,have the linderman mount in there as well,im going to disconnect my egts as i was tied into the red wire with blue stripe right at the ccu near the fuse didnt think it would be an issue but going to eliminate
that as a cause as well just incase the ccu is loosing a bit of voltage to send to other things like the pump or injectors

 

[WyoBoy1000]

I had my egts hooked up the same. I would put new plugs in it also.

 

[slomo]

will try new plugs in the morning to see how it goes kepp the ideas coming thanks to all

 

[Qreiff]

My sled acted weird (without going into all the details) and it ended up being coils. After reading this thread, I could easily see it being a coil(s) or stator issue.

 

[WyoBoy1000]

Mine did the same then quit, but I can't remember for sure why, might have just been the PCIII. I remember around then finding plug wires worn, loose ground, brake light stuck on, hand warmer bad, and it quit but just can't remember.

 

[slomo]

still nothing going to swap ecu from another one tomorrow,new plugs are in and run some cleaner through it just to make sure,i will post a vid of what its doing tomorrow as well so you can see how it acts thanks for all the ideas
so far,stator ohm tested fine but realize it still may be it as well,going do do a few more tests first but again keep the ideas coming thanks so far

 

[WyoBoy1000]

Add fuel on top at max rpm