very hard start when cold - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 15 (permalink) Old 04-12-2007, 08:11 PM Thread Starter
 
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very hard start when cold

i just bought a 1986 vulcan 750. when its warm it starts fine but when its cold it is a bear to start. and is worse the colder it is out. if you use the choke it floods.
any suggestions?
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post #2 of 15 (permalink) Old 04-12-2007, 08:47 PM
 
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I found this advice in another thread here. Once you have her started, move the choke forward. Note where the rpms start to climb. Next time it's cold move the choke to this spot and try a start. Remember too not to run your starter for too long without letting it cool. You don't want to burn out any windings.

Do a search on starting, there are some good threads with starting advice for most situations.
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post #3 of 15 (permalink) Old 04-12-2007, 10:37 PM
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Have you run any Sea Foam through the gas?
It will clean out your fuel system great.

Chad Falstad "Hawk"
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post #4 of 15 (permalink) Old 04-13-2007, 12:32 AM
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might try some of the irridium plugs too.... I'm going to get a set this year. So far every one who has put them in love them! worth a shot!

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post #5 of 15 (permalink) Old 04-13-2007, 09:00 AM
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A maintenance free battery has solved a saddlebag full of cold starting problems too. More CCA and no hassle checking the battery levels weekly
(you people with the acid batteries DO check them weekly don't you?)
Then.. if it is a time between rides, you can also hook up the battery with a connector and plug into the charger between rides.
Our bikes like a strong fully charged battery. This is also good if you tend to do short commutes (under 25 miles and lower speeds) The battery charges usually at 3000 rpms+, extended stretches under that drain the battery.

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post #6 of 15 (permalink) Old 04-13-2007, 11:50 AM
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Quote:
Originally Posted by Dianna View Post
A maintenance free battery has solved a saddlebag full of cold starting problems too. More CCA and no hassle checking the battery levels weekly
(you people with the acid batteries DO check them weekly don't you?)
Then.. if it is a time between rides, you can also hook up the battery with a connector and plug into the charger between rides.
Our bikes like a strong fully charged battery. This is also good if you tend to do short commutes (under 25 miles and lower speeds) The battery charges usually at 3000 rpms+, extended stretches under that drain the battery.

I guess I'm lucky and have a good charging system... My commute is 10 miles each way (actually 2 ~10 mile trips and 1 ~5 mile trip). Have kept an eye on voltage every other week or so, and so far the battery charger has considered the battery fully charged right off the bat ;-).

Then again... most of the commute is at near highway speeds...

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post #7 of 15 (permalink) Old 04-13-2007, 12:13 PM Thread Starter
 
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hit has plenty of starting power from the battery. it just dont want to fire when its cold. im going to try the sea foam stuff for a few tanks and see what happens. the maybe rebuilt the carbs
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post #8 of 15 (permalink) Old 04-13-2007, 01:11 PM
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since you said it is flooding if you use chocke i'm guessing the problem somewhere in that area. i can't imagine starting mine without the choke.

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post #9 of 15 (permalink) Old 04-13-2007, 02:16 PM
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If it is flooding with the choke, something is wrong with the choke. It shouldn't flood especially when cold. That's what the choke is for.
One thing though. You didn't mention whether or not you use throttle when starting with the choke. You should leave the throttle alone if you are using the choke. Twisting the throttle while using the choke may flood the bike. When starting mine with the choke on, I leave the throttle alone and let the RPMs come up and then move the choke lever forward until the RPMs drop to about 1500 or so. After about a minute or so, the RPMs start to come up so I move the lever forward again and let it warm up from there for about another 2 minutes or so and then move the lever all the way forward. Hope this helps.

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post #10 of 15 (permalink) Old 04-13-2007, 03:13 PM
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Mine has an MF battery, and I've had the bike a year now, this month. Back in December or January, it started getting hard to start on cold mornings. I bought the iridium plugs and installed them and it has started every time first touch since. Your plugs might be needing replaced. Probably new OEM plugs would have solved my problem, but the iridiums are what I chose.
If it floods, I'd almost guarantee your plugs need replacing, as long as you are using the right method of starting cold, with choke and no throttle. Weak spark causes a rich fuel condition, which will foul the plugs even faster...

Before you even think about rebuilding your carbs, see what seafoam can do for you too. But I'd start with plugs.

Fergy
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