October 21st, 2013, 02:37 PM | #1 |
ninjette.org member
Name: Justin
Location: Toronto
Join Date: Sep 2013 Motorcycle(s): 2010 Ninja SE Posts: 103
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Engine dies during cold starts, normal?
My bike starts fine in summer, now its getting colder. I turn on the choke to start the bike, it starts fine also but after a few seconds it shuts off itself. After second starts, it dies again. Third start, same thing. To fix the problem, I usually give it a little gas to rev the engine slightly (3-4k rpm) for about 5-10 seconds. Then I can let go and the bike will keep running.
I am wondering if this is normal? |
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October 21st, 2013, 02:52 PM | #2 |
Long Time Rider
Name: Blue
Location: Charlotte, NC
Join Date: Sep 2010 Motorcycle(s): 2009 Kawasaki Ninja 250R Posts: A lot.
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Either your choke cable is improperly adjusted or your warm engine idle speed is too low. Your idle speed should be around 2-3k rpms with the choke on. The idle speed with the choke on should start low and increase as the engine warms up.
Your warm engine idle speed should be 1350 +/- 50 rpms. It should be adjusted when the bike is fully warmed. |
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October 21st, 2013, 02:54 PM | #3 | |
ninjette.org member
Name: Justin
Location: Toronto
Join Date: Sep 2013 Motorcycle(s): 2010 Ninja SE Posts: 103
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Quote:
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October 21st, 2013, 03:02 PM | #4 |
ninjette.org guru
Name: Ben
Location: R'lyeh
Join Date: May 2011 Motorcycle(s): 2006 GSXR 750; 1983 CB750SC Posts: 277
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I kept my operating temperature idle at 1500 rpm (fully warmed up). On cold days with choke fully open, the bike will sit at 2-3.5k rpm. As it warms up, the revs with rise to around 3.5-5k. I usually leave it at full choke until the rpm's naturally go up to 5.5k with 100% choke before I cut choke completely and ride. Another method I began to use more commonly was to use 100% choke to start the bike, then adjust the choke to allow 2-2.5k rpm and ride conservatively for 5 minutes, then shut off the choke completely and ride normally.
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October 21st, 2013, 03:55 PM | #5 | |
Long Time Rider
Name: Blue
Location: Charlotte, NC
Join Date: Sep 2010 Motorcycle(s): 2009 Kawasaki Ninja 250R Posts: A lot.
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Quote:
Ideally it should be under 3k (manual says 2.5K) You should check to make sure you have enough free play in your choke lever (2-3 mm) at the bottom of the choke lever. You can also reduce the amount of choke you use to start up too, if you don't know how to adjust your cable. |
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October 21st, 2013, 04:11 PM | #6 |
ninjette.org guru
Name: Ben
Location: R'lyeh
Join Date: May 2011 Motorcycle(s): 2006 GSXR 750; 1983 CB750SC Posts: 277
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October 21st, 2013, 07:49 PM | #7 | |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
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Quote:
Use just enough choke to keep it running around 2500 and no more. Let it idle for a couple of minutes, then ride moderately to warm it up, keeping the revs lower until fully warm. It will warm up completely a lot faster riding than idling. |
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October 22nd, 2013, 06:55 PM | #8 |
ninjette.org sage
Name: Sarah
Location: NYC
Join Date: Aug 2012 Motorcycle(s): Silver 2005 Ninja 250 - Available for free mustache rides. Posts: 842
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I've had this problem too. I've read that the best way to warm up is to ride, but if I ride too quickly, she just died as I go to a stop for a stop sign. I usually try to keep her around 3k with choke and as she warms up, I slowly lessen choke to get her back to 3k.
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October 24th, 2013, 02:31 AM | #9 | |
ninjette.org guru
Name: scott
Location: australia
Join Date: Jan 2012 Motorcycle(s): 2012 ninja 250r se Posts: 435
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Quote:
if i leave the bike outside in the frost overnight i cannot start the bike until i flood the engine. put the choke on, hold it flat for 10sec, then try to start. summer i dont need the choke at all. every bike is different |
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October 24th, 2013, 04:10 AM | #10 |
ninjette.org certified postwhore
Name: .
Location: .
Join Date: Feb 2011 Motorcycle(s): . Posts: Too much.
MOTM - Feb '13, Feb '14
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The choke is not an on or off device. It is an analog thing and gas many shades of on. You should try giving it 2/3-3/4 choke instead of full choke so itgr bike idles around 2500 rpm while first started.
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