Steve's CFMoto 650 NK（春风 650 NK）

[Wald0]

OK, so I got my ECU. I swapped the old one for the new one in less than 5 min, and, voila - everything works as it should: no warning lights, no spluttering engine, no nothing.
Good.
Forgot to post that before actually sending me the goods, the sales guy / girl asked me for my bike production date. I sent him that together with the VIN and engine number just so as to be on the safe side. It looks like there have been different generations in ECU firmware and the one I got was plain buggy. But this is just my guess.
I do hope that the new ECU works well and brings me no trouble.
Should it malfunction again, I will sell the bike in a flash and hold a very negative opinion of CFMoto's electrical components R&D and QC (as if CFMoto cares about my opinion, aha...).

Great! im in the same boat also.. :/ my bike sputter at 4-5000 rpm range.. and the culprit it the ECU!! There is also different throttle bodies out there.. with holes in the butterfly valves and without.

[Wald0]

OK, so I got my ECU. I swapped the old one for the new one in less than 5 min, and, voila - everything works as it should: no warning lights, no spluttering engine, no nothing.
Good.
Forgot to post that before actually sending me the goods, the sales guy / girl asked me for my bike production date. I sent him that together with the VIN and engine number just so as to be on the safe side. It looks like there have been different generations in ECU firmware and the one I got was plain buggy. But this is just my guess.
I do hope that the new ECU works well and brings me no trouble.
Should it malfunction again, I will sell the bike in a flash and hold a very negative opinion of CFMoto's electrical components R&D and QC (as if CFMoto cares about my opinion, aha...). I cannot afford dropping another 2.5K on a bike every now and then.

So im in the same boat also now.. need New ECU!! There is also different throttle bodies out there, with and without hole in the butterfly valves. this hole thing must be new bike.

[Steve_Halt]

Wald0, most likely this is an upgrade for the 2014 model. But again, I am just guessing. The original engine seems to be almost identical to ER-6N's, so probably Chinese R&D and upgrade isn't much of a positive thing...
I've been riding with a flashing warning light for more than half a year - first it didn't influence the riding experience anyhow, but then the bike started behaving strangely, and only then did I decide to change it.

[Wald0]

Yes, mine will not even throw any errors at all, I Had airleak in my throttle bodies butterfly shaft and replaced it with new throttle body and it had those holes.. they say ECU should be re programmed if done that., but i have not seen any differences in performance. until this ECU went bad.. :(

[ZMC888]

The hole in the butterfly valves is meaningless. Both work off the same ECU. My TPS went in the first few weeks, I was able to source 2 different throttle bodies under warranty both in 2013 one with hole one without (as the TPS as not sold as a separate part, but is included with the throttle bodies). It's just a different way of solving the same problem at idle. Either the throttle body is a little open to let some mix through or it goes through the hole. I researched it because I was thinking about changing the bodies if one was superior to the other.

I'm sure the ECU is the culprit. I also don't massively blame CFMOTO in this case as the ECU/throttle bodies/injectors/sensors are from Ducati/Dekra/Magnetti Magnelli. I reckon the old equipment has some issues, but I still worry about longer term reliability. Still considering who made the electronics, its got to be less of a worry than a if it was directly made by a Chinese motorcycle company.

[Wald0]

The hole in the butterfly valves is meaningless. Both work off the same ECU. My TPS went in the first few weeks, I was able to source 2 different throttle bodies under warranty both in 2013 one with hole one without (as the TPS as not sold as a separate part, but is included with the throttle bodies). It's just a different way of solving the same problem at idle. Either the throttle body is a little open to let some mix through or it goes through the hole. I researched it because I was thinking about changing the bodies if one was superior to the other.

I'm sure the ECU is the culprit. I also don't massively blame CFMOTO in this case as the ECU/throttle bodies/injectors/sensors are from Ducati/Dekra/Magnetti Magnelli. I reckon the old equipment has some issues, but I still worry about longer term reliability. Still considering who made the electronics, its got to be less of a worry than a if it was directly made by a Chinese motorcycle company.

Sure, can't blame Chinese all the time... or can you?? where was those components made?? china?? ;)
first Ducati's where infamous of their electrical problems.. and ou yes... they were italians... ! bike made in china with Italian electronics.. we are so screwed! fingers crossed boys! haha ;)

[ZMC888]

Sure, can't blame Chinese all the time... or can you?? where was those components made?? china?? ;)
first Ducati's where infamous of their electrical problems.. and ou yes... they were italians... ! bike made in china with Italian electronics.. we are so screwed! fingers crossed boys! haha ;)

Hang on! The hugely reliable GW250, YBR 125, YBR250 and CBF150 are made in China....see Chinese can do it right when they have a Japanese management structure!
Dekra are a massive company. Watch F1 and I'm sure you'll see their logos on a few billboards and cars. OK, yes the stuff is made in Shenzhen China. But hold out some hope..................

[Steve_Halt]

Wald0, ZMC888, I read through your threads on 650 NK and got a lot of useful info. Thanks for sharing :)

So far, the new ECU has been ok, BUT ... [drumroll] ... after installing it, my bike's idle has been fluctuating between 2000 and 2500 rpm. I believe it is unnatural. Question: is there any way to manually adjust idle on an EFI engine, like you would do it on a carburetted one?
If not (and I assume not, since it is ECU and a massive amount of sensors responsible for ice adjustment), any ideas as to what I am supposed to do with that? The bike seems to run hotter than usual, and the ten gauge reaches 4-5 bars when sitting in traffic.
Idle with the previous ECU was a steady 1500 rpm...

[ZMC888]

Wald0, ZMC888, I read through your threads on 650 NK and got a lot of useful info. Thanks for sharing :)

So far, the new ECU has been ok, BUT ... [drumroll] ... after installing it, my bike's idle has been fluctuating between 2000 and 2500 rpm. I believe it is unnatural. Question: is there any way to manually adjust idle on an EFI engine, like you would do it on a carburetted one?
If not (and I assume not, since it is ECU and a massive amount of sensors responsible for ice adjustment), any ideas as to what I am supposed to do with that? The bike seems to run hotter than usual, and the ten gauge reaches 4-5 bars when sitting in traffic.
Idle with the previous ECU was a steady 1500 rpm...

My friend and I have both got the same bike, so I have a fairly clear understanding of what the bike should be doing and what is normal. 3 bars of heat and 1500 rpm, as you suspect is normal. 4-5 bars of heat and 2500 rpm is absolutely not correct. I think EFI bikes do often have idle adjust screws, but I haven't heard of one on our bike.

Is your fan coming on within 5 minutes of starting the bike?
I would certianly check the air filter/fuel/plugs.
I would certainly check the ECU connector, as this is known to be cheap and cause some errors. Clean the connector with alcohol and a q-tip. I reckon the ECU is runniong errors and needs a look at, however as we can't do it, have a look at what we can do. Hot and high idle sounds too lean.

[Steve_Halt]

ZMC888, no the fan doesn't come on that fast. The bike's air filter and plugs were changed march this year, all bought from the official CFMoto TMall store. Fuel is #95 gas.
The idle RPM is not fluctuating any more, sitting steadily at 2000 and giving me 3-4 bars of heat when riding in downtown traffic. I've noticed my single cylinder EFI Suzuki EN-150 also has 2000 RPM idle and it does feel comfortable and sound OK, unlike 650 NK...
Will clean the ECU connector tonight.