Author Topic: cold starting  (Read 1504 times)

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Offline Ernie

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cold starting
« on: September 21, 2006, 07:12:45 PM »
my bike runs great,starts right up too as long as the chokes on, better than i ever expected,actually ,but it does seem to take a long time to warm up,i have to leave the choke on for like 5 minutes after sitting all night.is this normal for these old bike or is there somthing needing attension? :-\
Its all happening !
my 1978 CB550K.......>>>
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bowhunter

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Re: cold starting
« Reply #1 on: September 21, 2006, 07:20:48 PM »
Does it require full choke for the full 5 minutes? I can usually back off on the choke after a minute or two depending on outside temps.
I normally run half choke for the first mile or so. If it requires full choke the whole time, the carbs could use a minor adjustment of the slow jets.

Bowhunter

Offline csendker

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Re: cold starting
« Reply #2 on: September 21, 2006, 07:25:41 PM »
I'm pretty much with bowhunter. Upper 40's this morning; started with full choke, backed off to ~1/2 or 2/3 closed within 1/2 minute or so, took off and was full open by the time I hit the end of my development, say a mile.  Probably a little quick, but then it was a striaght run at 40 mph for a while right after.

5 minutes of full choke would, well, choke it to death.
Actually runs --> 1975 CB550-K1
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Offline medic09

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Re: cold starting
« Reply #3 on: September 21, 2006, 08:37:51 PM »
In addition, I find that if the bike sat until 'cold' again (like after parking it after my commute, and coming back in the afternoon to ride home), it starts better with the choke for 2-3 minutes...

IOW, some choke first thing is pretty usual.  I think the owner's manual for the new bike even says to start it with choke at first.
Mordechai

'78 CB750K
'76 Triumph T160 Trident (rebuilding)
'07 aprilia Caponord

Santa Fe, NM

Offline DrMark

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Re: cold starting
« Reply #4 on: September 22, 2006, 02:28:35 PM »
I agree with Bowhunter. Mine starts and runs like he describes. I also kick mine over a few times with the key off to start moving some of the fluids around (per Honda manual - cold starting procedure), then turn key on...hit start button and Vroom...lol
1978 CB550K
1983 CB650SC Nighthawk

Offline gar

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Re: cold starting
« Reply #5 on: September 22, 2006, 03:30:52 PM »
You don't  need full choke for 5 mins, as the others say...try backing it off after a minute or so.  ALSO - IF YOU RUN IT WITH THE CHOKE ON TOO LONG, YOU'LL BLUE YOUR EXAUST PIPES.
Don't use a big word where a diminutive one will suffice.

Offline Ernie

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Re: cold starting
« Reply #6 on: September 22, 2006, 03:42:32 PM »
my exaust pipes are black :P and i do back off the choke after about a minute but cant totally open it untill about 5 minutes,i gather from the replys all these ol bikes are about the same thnx for all your replys :)
Its all happening !
my 1978 CB550K.......>>>
http://gallery.sohc4.net/main.php?g2_itemId=4440

Offline Gordon

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Re: cold starting
« Reply #7 on: September 22, 2006, 07:42:12 PM »
It does get a bit irritating having to keep it alive with throttle when down shifting and waiting at stop lights, but I still love her. 

Just turn the idle stop screw in a little until it gets warmed up.

Offline csendker

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Re: cold starting
« Reply #8 on: September 22, 2006, 07:53:17 PM »
Or gum up your slow jets some, just enough so the RPM's magically start to climb while at idle like mine does.  It's that innovative Honda Automatic Idle Speed Adjustment System.  ;)
Actually runs --> 1975 CB550-K1
Projects ---> Crusty old boat
Gallery --> http://www.sohc4.us/gallery/v/members/personal/Christopher/?g2_navId=xada3c7ff