Thread: Steve's CFMoto 650 NK(春风 650 NK)
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#201 Re: Steve's CFMoto 650 NK(春风 650 NK)08-09-2013, 05:54 AM
I will try to give you a more mature reply then the previous one:
Try to measure / or just replace in case you can't measure, the fuel relais.
Relais sometimes go bad, specially if low quality internals are used.
They still click (that's what you hear) but they do not really connect any more, not allowing current to flow to your start motor.
If it is not the relais, you got to dig a bit deeper.
I know that e.g. Ducati's and many alarm systems don't match well, might be the case for your NK as well.
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#202 Re: Steve's CFMoto 650 NK(春风 650 NK)08-09-2013, 05:57 AM
Thanks for that! Do you happen to know what the standard resistance is for those relays? I don't see anything in my manual about that and I'll be honest about electricity not really being my strong point...
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#203 Re: Steve's CFMoto 650 NK(春风 650 NK)08-09-2013, 06:33 AM
You being in Shanghai; by far the easiest way is to buy and replace one.
They hardly cost anything, and you will know immediately.
If the problem persists, you got to give a bit more details on the 20 min start process.
Remote diagnostics is difficult, but not always impossible.
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#204 Re: Steve's CFMoto 650 NK(春风 650 NK)08-09-2013, 06:43 AM
Yeah, for sure. That's why I was asking about the rating, so I could go pick up a spare on the way home from work ;-)
Basically, if the bike is not ridden for more than 2 or 3 days, when I go to start it this is the sequence:
1. Ignition on, all battery lights check out
2. Arm the kill switch
3. ECU light comes on for the check phase and I hear the relay click
4. Check light goes out and I hear the relay click again
5. Hit the starter and it turns over, but no combustion
6. Kill switch off
7. Ignition off, remove the key
8. Smoke a cigarette and curse
9. Try again.
After a few cycles, I usually hear the relay click, then the fuel pump priming (about a 1 second motor hum). Then it starts no problem. I've tried the following:
1. Disconnect and reconnect the ECU
2. Checked all cables from o2 sensor, sidestand sensor, coils etc.
3. Fiddled with connections around fuel pump
4. Shake the bike around to set off the GPS alarm, then reset it with my phone
None of these things seems to have a direct result. It just seems to decide it wants to start eventually. Thanks for this, by the way!
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#205 Re: Steve's CFMoto 650 NK(春风 650 NK)08-09-2013, 07:08 AM
I dont know what they are rated, they should be basically all the same (higher amp).
Any headlight relay or start motor relay will do.
They just allow 12V through (direct from your battery to your pump) if they are powered (by your ECU signal).
Your sequense confirms to me to start with suspecting the relais, if not, then pump.
I don't think it is ECU related, seems you get the signals on the right time / location.
E.Last edited by 998S; 08-09-2013 at 07:12 AM. Reason: Not enough coffee, wrote bs before. This should be correct.
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#206 Re: Steve's CFMoto 650 NK(春风 650 NK)08-09-2013, 07:12 AM
Good call, thanks again! I'll pick up a new relay on the way home, plug it in and let you know the outcome!
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08-10-2013, 04:36 AM
So, turns out it was a faulty connector to the fuel pump. One of the little blade connectors worked loose somehow. Not sure why it would sometimes start - maybe my fiddling around somehow knocked it back into place. The blades were so loose you could just slide them out of the connector with no effort.
Thanks for the help though, at least I know how to test a relay now :-)
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#208 Re: Steve's CFMoto 650 NK(春风 650 NK)08-10-2013, 05:49 AM
themicah, no worries about hijacking the thread :)
Tell you what - I haven't ridden my bike for a couple of weeks. Then I'd try to start it - unsuccessfully.
1. Ignition on, dials lights on.
2. Relay click, no pump whirring.
3. Repeat.
Fuel pump connector problem :)
So thanks lots, cheers!
Ride safe :)
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08-10-2013, 06:15 AM
Haha! Good to hear the hijacking served a purpose other than my own! I guess it's worth noting to all potential 650nk owners that this forehead slapper of a problem isn't so uncommon. I wish I had a garage, I'd put together my own set of connectors and require all those bits after seeing how poorly this one was assembled. Disappointing, but good to know it wasn't something more major, like the ECU or the fuel pump.
Next mission for me is a modded faring that lets me access the coolant fill spout without removing the damned faring first... Extras are cheap on Taobao, and that'll be a good project until this damned furnace of a summer shuts down.
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#210 Re: Steve's CFMoto 650 NK(春风 650 NK)08-10-2013, 09:27 AM
make sure you take lots of pics when doing the fairing mod :) I'll most likely need it as well :)
Speaking of which, themicah, how's the bike in this weather? I mean, +40 and all...
The reason I ask - I'm in Nanjing, that is very near Shanghai and we have pretty similar weather over here. I got a couple of bikes to choose from and I noticed I tend to pick my wife's Suzuki EN-150 over my CFMoto more and more often.
The bike doesn't overheat, just feels not right in this scorching heat.
What do you say?
Cheers!Last edited by Steve_Halt; 08-10-2013 at 09:29 AM. Reason: added info
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