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Cold Start

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Cold Start

PostAuthor: bobbygrigoroff » Wed May 30, 2007 8:48 am

Hi Folks

I've been away in the bush for a while (without my bike) and it's great to be back (I think).

New problem for my lady??

Started the bike up (couldn't wait) but noticed the rear cylinder was not firing up - exhaust output was cold. Checked the plugs for spark - no problems there. Started her up again and this time waited a minute or so and it started to fire up - exhaust output was warm (same as front). (I did'nt check for a wet plug - but will do that tomorrow).

I did do the following battery check though (I've seen often enough on this site that if the battery is pooped the bike will run like poop)

I switched her off and checked the battery - 12.4 volts. With the battery out of its hiding place I started her up again and checked the voltage - 12.8volts coming through - not enough according to the book.

Tested the stator wires (3 of them in pairs) and they came up 5ohms.

Will a crap battery show the incoming charge as lower than it should be? even though in the off position it comes up with 12.4 volts?

Is there something else I can check that is more likely or is the battery the most likely culprit (I have had the bike for 8 months but don't know how old the battery is). :con:
1997 Virago 750
The More I Learn About Women
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The More I Learn About My Bike
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PostAuthor: SeaComms » Wed May 30, 2007 8:56 am

It is showing that it is charging a little bit at least, thats a start. The battery on these ladies needs to be in tip top shape to fire the ignition properly, the general concensus is a year is a good life span.

The stator winding however should be around 0.5 ohms between any of the white wires at 20* celcius, with 14.3 - 15.3 volts showing at the battery at 200 rpm. Something is not right there.
Help us to help you - PLEASE PUT YOUR BIKE DETAILS IN YOUR SIGNATURE AND TURN YOUR SIGNATURE ON!
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Cheers, Dave.....
1984 XV750 (Japanese model imported in 2002) - Mustang Seat, modified 535 Windscreen, Modified Resonator, Willie n Max bag set, HID Headlamp, Highway pegs...

Advice given is just my opinion, is done so with the best of intentions
and based on previous experience or the ability to read a manual.
Please don't hold me responsible if you break something following my advice..
However I would be happy to take credit if it works ;)

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PostAuthor: Aussiexv1100 » Wed May 30, 2007 9:13 am

Did you use the charging fault find chart I sent you. It should tell all.
Aussie
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When in doubt, it is usually best to remain silent, and be thought a fool,
rather than foolishly open ones mouth, and remove any doubt.
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Re: Cold Start

PostAuthor: bobbygrigoroff » Wed May 30, 2007 9:19 am

Aussie - you ripper, I forgot all about that chart. Thats my next move.

:beer:

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Re: Cold Start

PostAuthor: bobbygrigoroff » Wed May 30, 2007 9:24 am

Oops - would the charging (or battery strength) account for the rear pot not starting up for 30 seconds or so? or am I looking down the tube at perhaps 2 problems (one found by chance - i.e. charging the other being the initial problem?

BTW saw a 1999 XV Road Star (1600) with 15k on the clock for $9000. Woulda bought it but it seemed a little rough for the Ks and the guy hadn't really done a good job on the body and paint. Are these suckers good?

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PostAuthor: Aussiexv1100 » Wed May 30, 2007 9:24 am

Remember, to read it very carefully, it is easy to misunderstand some of the instructions, ask F/F medic. LOL
Aussie
It's a lazy man that won't find his wife a second job.

When in doubt, it is usually best to remain silent, and be thought a fool,
rather than foolishly open ones mouth, and remove any doubt.
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PostAuthor: Aussiexv1100 » Wed May 30, 2007 9:32 am

Yeah I think that an under charged or weak battery can cause one cylinder to drop out.

I think that the Roadstars are ok, Haven't heard any bad reports on them.
Aussie
It's a lazy man that won't find his wife a second job.

When in doubt, it is usually best to remain silent, and be thought a fool,
rather than foolishly open ones mouth, and remove any doubt.
[author unknown]
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PostAuthor: mark75 » Wed May 30, 2007 9:35 am

wonky battery is a mating call for gremlins. :up2:
"Over the Mountains of the Moon,
Down the Valley of the Shadow,
Ride, boldly ride" ... E.A. Poe


Time flies >>> whether you're having fun __ :bike: or not :fan: ---

Any day above ground is a good day.
so Laissez les bon temps roulez ... just roll safely
Semper Vigilans...always watchful

"I hear and I forget, I see and I remember, I do and I understand." ... Confucius*

If you don't read the news you are not informed.
If you read the news you are misinformed.
... Mark Twain


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*The views, opinions, and experiences expressed in this post are mine and may not necessarily represent views and opinions of other VTF members, so feel free to agree, disagree, or ignore them.*
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Re: Cold Start

PostAuthor: bobbygrigoroff » Wed May 30, 2007 9:41 am

Thanks Aussie, SeaComms & Mark.

I will run through the test matrix and see where it takes me (and whomever i can conscript to help me at the time)

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