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Offline Steel CB650C

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I'm new
« on: August 11, 2012, 12:37:22 PM »
Hello All

I am a new member with a 1981 CB650C in great shape with only 19500K I have only had it for 6weeks but I have my woes. Nice to be a member I love the site. Look forward to future ride and meeting members.
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Offline Bob Wessner

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Re: I'm new
« Reply #1 on: August 11, 2012, 01:00:50 PM »
Welcome. Lots of help with woes here.  ;)
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Offline scunny

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Re: I'm new
« Reply #2 on: August 11, 2012, 01:50:27 PM »
welcome, and as Bob said, we deal in woes.  ;D
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Offline cb650

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Re: I'm new
« Reply #3 on: August 11, 2012, 09:19:02 PM »
Welcome
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Offline bender01

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Re: I'm new
« Reply #4 on: August 11, 2012, 10:04:14 PM »
Welcome with your woes! Where are you?  Some one near you will help.. open beers to cure the woes! ;D
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Offline Steel CB650C

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Re: I'm new
« Reply #5 on: August 12, 2012, 01:09:58 PM »
Hi All

Thanks for the welcome

I am located just outside of Toronto and here is my story.

I bought this bike 6 weeks ago from someone who used it as a 2nd bike the bike was insured and plated the previous owner let me take it to my shop for inspection. I took it on a 60k trip city and highway and got it up to 140k with no problems. The bike shop was impressed with its condition and the fact it only needed 2 throtle cables and a bulb for safety. So I bought it for $950.00 the bike shop recomended that I have the carbs cleaned as it seemed a just a little off so I agreed and thats where my woes started.

When the bike was returned to me it sounded much better than it did before and seemed a little quicker even lighter that is until I hit 5500rpm then it lost all power and would not go over 105k so the bike is back in the shop and has been there for 3 weeks.

I have had only 6 days with this bike and dont even have pictures yet the rest of the time the bike shop has had it. They think after 6 failed repair attempts that there is a short before the CDI spark module. That is being the bike is in such shape there is nothing they can find wrong but now the 1st and 3rd cylinders are not firing?

Help anyone please  :'(
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Offline cb650

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Re: I'm new
« Reply #6 on: August 12, 2012, 03:52:05 PM »
If your serious about the bike bring it home and do the work yourself.   A"shop" will bleed u dry.   The 650 isnt that hard to work on.  But it is a 30 year old and probably needs help.  And every bike has issues after that time and previous owners.
That being said the bike has 2 ignition circuits on 1/4 and 2/3 cyls.  So it might be carbs. Hows the tank inside?  first place to start no matter what in my small book.
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Offline Steel CB650C

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Re: I'm new
« Reply #7 on: August 12, 2012, 04:13:09 PM »
The carbs have been cleaned and checked 3 times the gas tank looks almost new. The bike is super clean everywhere.
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Offline cb650

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Re: I'm new
« Reply #8 on: August 12, 2012, 04:22:04 PM »
Then it is just a process of elimination.  Takes time but worth it in the end.
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Offline onepieceatatime

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Re: I'm new
« Reply #9 on: August 12, 2012, 04:23:19 PM »
Quote from: cb650 on August 12, 2012, 03:52:05 PM
If your serious about the bike bring it home and do the work yourself.   A"shop" will bleed u dry.   The 650 isnt that hard to work on.  But it is a 30 year old and probably needs help.  And every bike has issues after that time and previous owners.
That being said the bike has 2 ignition circuits on 1/4 and 2/3 cyls.  So it might be carbs. Hows the tank inside?  first place to start no matter what in my small book.

I agree withe everything cb650 said.

Quote from: Steel CB650C on August 12, 2012, 04:13:09 PM
The carbs have been cleaned and checked 3 times the gas tank looks almost new. The bike is super clean everywhere.

It doesn't matter how many times they have been cleaned if there is fine particulate getting into them plugging them up again.
Disconnect the fuel line from the carbs, turn on the petcock, and allow some gas into a clear jar. From that you will be able to see any debris that may be getting into the carbs.
The only way it would be ignition related with 1 & 3  being the problem is if the shop in question put the plug wires on wrong. As stated, 1 & 4 are on one coil and ignitor and 2 & 3 are on the other coil and ignitor. If the shop can't get firing order correct, I certainly wouldn't trust them to a carb bank clean and setup correctly.
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Offline onepieceatatime

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Re: I'm new
« Reply #10 on: August 12, 2012, 04:24:04 PM »
You may also want to visit this site:
http://www.hondacb650.com/index.php
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Offline cb650

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Re: I'm new
« Reply #11 on: August 12, 2012, 04:48:57 PM »
Clean the tank no matter what.  No reason to dump #$%* in clean carbs.
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Offline kslrr

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Re: I'm new
« Reply #12 on: August 13, 2012, 07:18:43 PM »
Welcome! 

Be patient and take your time.  The first go around for me on my 650, I had the carbs off/apart 6 times.  Now once again, after sitting in Las Vegas for 6 months, #3 is not firing.
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Offline Steel CB650C

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Re: I'm new
« Reply #13 on: August 14, 2012, 03:18:24 PM »
Thanks for the advise guys I will get my bike back and fix it my self and then I will finally be able to post some picts. :)
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Offline Steel CB650C

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Re: I'm new
« Reply #14 on: August 25, 2012, 11:31:14 AM »
Bikes back and all fixed she runs like a champ the shop kept it until it was fixed and only charged me another $29.00 after 3 techs worked on it for 2 weeks. Pictures will be posted today sometime. I can give details of all repairs tests and mistakes upon request.
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