'80 CB650 Bobber project

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Tactical
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Re: '80 CB650 Bobber project

Postby Tactical » Sun Jul 14, 2013 2:49 am

Works great! Rides well, runs good. only two issues. The first is that it's only getting about 30 mpg, though I'm not sure what it should be getting so....The second is that I have some cam chain slap when coming off the throttle so I'm trying to get that fixed now. other than that I love it!
There are sheep, there are wolves, I am the sheepdog

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Volker_P
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Re: '80 CB650 Bobber project

Postby Volker_P » Thu Jul 18, 2013 2:04 am

Really unique result! :D

30mpg? Check out if it runs on all four at all.

Too loose cam chain typically is a quite similar but somewhat louder sound like valve ticking.
So I doubt that cam chain slack is something that can be heard on releasing the throttle. Unless maybe the tensioner may not be blocked by the rear bolt any more.
Cosky's great (free) online manual: http://cosky0.tripod.com

forum links to common technical issues

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Tactical
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Re: '80 CB650 Bobber project

Postby Tactical » Sat Jul 20, 2013 9:19 am

Thanks!

Got two full tanks through it now and its getting about 40 mpg. Which with the larger rejet and moving up the needles I expect some loss in mpg. The only issue now is the noise. like I said it only happens when I'm off the throttle, coasting.. and it definitely sounds like something loose and slapping internally. It doesn't seem to make a difference if I pull the clutch in either. I'm having too much fun riding it right now, but if I can't figure it out I'll tear back into it as soon as it gets cold again.
There are sheep, there are wolves, I am the sheepdog

cb650
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Re: '80 CB650 Bobber project

Postby cb650 » Sat Jul 20, 2013 6:32 pm

40 is ok if you riding it hard. They are capable of 55 without to much trouble.
addressed your slapping in another thread.
Did you clean the tank out?!?!?!?!

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Tactical
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Re: '80 CB650 Bobber project

Postby Tactical » Wed Jul 24, 2013 9:12 am

Which thread?
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Tactical
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Re: '80 CB650 Bobber project

Postby Tactical » Wed Jul 24, 2013 2:40 pm

found it! Drive chain hitting the case saver under the sprocket cover. I'm running a larger front sprocket so I had to do some cutting and welding but its all good now. Thanks!
There are sheep, there are wolves, I am the sheepdog

bubbawayne
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Re: '80 CB650 Bobber project

Postby bubbawayne » Sat Sep 28, 2013 12:14 pm

Could you post the pics of the tank fabrication you did please?

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Tactical
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Re: '80 CB650 Bobber project

Postby Tactical » Sat Sep 28, 2013 1:46 pm

I cut the front mounts on the Harley Sportster tank off and moved them down on the tank from where they originally were.
Image

They line up with the stock hole in the frame now. I just had to grind the area down a little..
Image

In the back I cut the tabs off and moved them outboard due to the width of the CBs backbone
Image

Then I welded on some bolts that stick out horizontally from the frame to grab the rear tabs
Image

I used rubber isolators between the mounts and bolts/nuts.
There are sheep, there are wolves, I am the sheepdog

bubbawayne
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Re: '80 CB650 Bobber project

Postby bubbawayne » Sun Sep 29, 2013 9:49 pm

Awesome! Thank you very much. Ill soon have a build thread going. I like the direction you went with yours.

Hawk213
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Re: '80 CB650 Bobber project

Postby Hawk213 » Sun Oct 27, 2013 1:39 pm

Nice bike! I plan to do the same with my 81 cb650...I'm curious on how to turn into hartail with the suspension and shocks.

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Tactical
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Re: '80 CB650 Bobber project

Postby Tactical » Sun Nov 03, 2013 5:56 pm

Update. Still no issues with this build, rides great and I always get into conversations about it where ever I go. The electronics mounted low in front of the rear tire is a non-issue. I've ridden it in all kinds of weather, and been caught in soaking rains with no problems what so ever. Love my Honda!
There are sheep, there are wolves, I am the sheepdog

Hawk213
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Re: '80 CB650 Bobber project

Postby Hawk213 » Sun Nov 24, 2013 3:14 pm

Nice. Your bike is sweet! Say, is that the original frame? or

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Tactical
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Re: '80 CB650 Bobber project

Postby Tactical » Sat Feb 22, 2014 10:52 am

Made a video from a ride when the sun was shining, helps get me through these ridiculous NY winters...

http://www.youtube.com/watch?v=kx_PLN1V ... e=youtu.be
There are sheep, there are wolves, I am the sheepdog

Pbiggs
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Location: Salt Lake

Re: '80 CB650 Bobber project

Postby Pbiggs » Sat Feb 22, 2014 9:05 pm

nice work man MERICA!


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