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Author Topic: Nighthawk Bobber - CB550sc  (Read 17219 times)

Offline clem

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Nighthawk Bobber - CB550sc
« on: Oct 20, 2011, 22:42:50 »
Well, I hope that I don't get the axe for having a DOHC honda but here we go. I bought the bike back in the early 90's for $500 and it was in good condition. I rode it for about 2 years then it started having charging issues and I parked it. I figured that I would tear the bike completely down, clean it, then troubleshoot the electrical when it was going back together....It never got put back together! About 5 years after that I tried an ill faded attempt at a mild "Kong" job only to go unfinished due to no welder. That brings us to the early part of this year when I got the idea to do a full hardtail bobber even though it is a shaft drive.
Here is how it once looked:

After the Konging!Lol

The bobbing process:




I've got the engine torn down right because I found water in the oil. I realized that I left the engine on the floor of my dad's shop back in 98 for a hurricane and it got about 6" of water in the shop!
Hopefully I'll get it back together soon.Looking to get the bike on the road by April.
« Last Edit: Oct 21, 2011, 10:15:42 by clem »
"After every war there are soldiers who refuse to surrender. To this day there are still thousands who cling to their 30+ year old motorcycles, thinking that the war is still on, refusing to concede that the four-strokes have won"

1972 DS7 http://www.dotheton.com/forum/index.php?topic=45886.msg505995#msg505995
1983 CB550sc bobber http://www.dotheton.com/forum/index.php?topic=30599.30

Offline clem

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Re: Nighthawk Bobber - CB550sc
« Reply #1 on: Oct 23, 2011, 22:29:43 »
I spent most of the afternoon soda blasting the engine cases today. After being covered from head to toe in baking soda I actually feel refreshed.
I was looking at the cyclinders today and I'm hoping a good honing will fix them up then I'll have to hunt down a new set of rings. Going through this thing is showing me how bad it actually is to let an engine sit for 10+ years.
"After every war there are soldiers who refuse to surrender. To this day there are still thousands who cling to their 30+ year old motorcycles, thinking that the war is still on, refusing to concede that the four-strokes have won"

1972 DS7 http://www.dotheton.com/forum/index.php?topic=45886.msg505995#msg505995
1983 CB550sc bobber http://www.dotheton.com/forum/index.php?topic=30599.30

Offline clem

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Re: Nighthawk Bobber - CB550sc
« Reply #2 on: Oct 23, 2011, 22:39:48 »
Does anybody have a good recomendation for removing the old gaskets? Tried the NAPA gasket remover but that's a mess in a can.
"After every war there are soldiers who refuse to surrender. To this day there are still thousands who cling to their 30+ year old motorcycles, thinking that the war is still on, refusing to concede that the four-strokes have won"

1972 DS7 http://www.dotheton.com/forum/index.php?topic=45886.msg505995#msg505995
1983 CB550sc bobber http://www.dotheton.com/forum/index.php?topic=30599.30

Offline sasquach

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Re: Nighthawk Bobber - CB550sc
« Reply #3 on: Oct 24, 2011, 01:27:20 »
Looks good .

Offline Maritime

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Re: Nighthawk Bobber - CB550sc
« Reply #4 on: Oct 24, 2011, 10:31:25 »
I used a scotch bright pad to get rid of old gasket.  A razor blade can work but you have to he very careful not to cut the aluminum and ruin your mating surfaces.  Cool build BTW.

Nice to see a good frame built with a Jig Etc.  Are you going to run the shaft exposed?  It would be neat to coat it in a nice powder colour that contrasts with whatever you do for a frame colour.
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson

Offline MotorbikeBruno

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Re: Nighthawk Bobber - CB550sc
« Reply #5 on: Oct 24, 2011, 11:16:09 »
Looking forward to this build!  I agree with Maritime too...a nice contrasting color would be slick.



Offline clem

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Re: Nighthawk Bobber - CB550sc
« Reply #6 on: Oct 24, 2011, 17:20:13 »
Thanks for the tip on the gasket removal. I really thought that the soda would take it off but it didn't. The shaft will be exposed like an old BMW. As far as paint, I was shooting to do the tank and rear fender like the old elsinore honda's from when I was a kid. I think they were silver with the black strip down the middle, the frame will be black and I'm going to blast the rims and clear over the aluminum. I thought about putting some powder coat on the shaft but other than black, I'm clueless as to what may look good on the shaft.
"After every war there are soldiers who refuse to surrender. To this day there are still thousands who cling to their 30+ year old motorcycles, thinking that the war is still on, refusing to concede that the four-strokes have won"

1972 DS7 http://www.dotheton.com/forum/index.php?topic=45886.msg505995#msg505995
1983 CB550sc bobber http://www.dotheton.com/forum/index.php?topic=30599.30

Offline Erskine

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Re: Nighthawk Bobber - CB550sc
« Reply #7 on: Oct 24, 2011, 19:12:13 »
Very nice bit of engineering there mate :)

Offline Maritime

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Re: Nighthawk Bobber - CB550sc
« Reply #8 on: Oct 24, 2011, 19:36:11 »
Match the tank, that would be cool.
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson

Offline clem

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Re: Nighthawk Bobber - CB550sc
« Reply #9 on: Oct 24, 2011, 20:14:57 »
Very nice bit of engineering there mate :)
You talking about the unistrut frame jig? Haha

Maritime that would be cool to have some pinstripes on the shaft! There is a housing at the end for the worm gear that's thicker, would be cool to paint a little number plate on there. I think they were green back then, I'll have to find some of my dads old pictures of his cr250.
"After every war there are soldiers who refuse to surrender. To this day there are still thousands who cling to their 30+ year old motorcycles, thinking that the war is still on, refusing to concede that the four-strokes have won"

1972 DS7 http://www.dotheton.com/forum/index.php?topic=45886.msg505995#msg505995
1983 CB550sc bobber http://www.dotheton.com/forum/index.php?topic=30599.30