Author Topic: Inherited Cafe?? Project/basket case (1972 cb500)  (Read 3564 times)

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Offline Drifter

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Inherited Cafe?? Project/basket case (1972 cb500)
« on: March 08, 2013, 07:55:26 AM »
A couple years back my fathers friend was diagnosed with terminal brain cancer. Before he died he found out I was getting
into old motorcycles, and he decide to leave me his 1972 CB500 cafe?? project. unfortunately I was not able to ask him a lot of questions
before he passed on.

Things I know he said
The swing arm has been extended by 3 inch
he said the motor is a CB500 built as a 550, I don't know what he meant by that?
maybe it has a 550 head?

the wheels are from some other bike .. maybe a Kawasaki LTD?
there is a hoop welded and a metal rear cowl and seat pan from a unknown bike (maybe a h2 triple ?)
the tank is from a later model Honda

There is a unknown number of parts in boxes that I have yet to even look at







more pictures
s289.photobucket.com/albums/ll222/Drifter_ghost/1972%20CB500/

shortly there after I joined the military and the engine was removed from the bike and it
is currently stored in my parents attic. I live about 8hrs away   

I came across a 1976 CB550 super sport with no title (although I may be able to get it titled)
that I planned to use as a part source for anything that might be missing

the long term plan is once I finish my contract with my current employer and get the bits and pieces
to my garage, where I plan to inventory the part boxes. and start the tear down of the engine
to try to investigate what I am working with

he also used to race bikes so it could have some hopped up parts in it too

« Last Edit: March 08, 2013, 08:06:50 AM by Drifter »
1972 CB500 project (boxs of parts)
1976 CB550 project (mostly complete)
1982 xj650 maxim Current Ride
1980 xs400 special runs

Offline Bankerdanny

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Re: Inherited Cafe?? Project/basket case (1972 cb500)
« Reply #1 on: March 08, 2013, 11:31:01 AM »
I wonder why he decided to extend the swingarm on a cafe bike? Longer makes sense on a drag bike, but not really for a cafe.

Those wheels look like Kawasaki to me.
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Current: '76 CB750F. Previous:  '75 CB550F, 2007 Yamaha Vino 125 Scooter, '75 Harley FXE Superglide, '77 GL1000, '77 CB550k, '68 Suzuki K10 80, '68 Yamaha YR2, '69 BMW R69S, '71 Honda SL175, '02 Royal Enfield Bullet 500, '89 Yamaha FJ1200

Offline brooze72

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Re: Inherited Cafe?? Project/basket case (1972 cb500)
« Reply #2 on: March 08, 2013, 12:18:01 PM »
Welcome, Drifter.  You certainly have a project on your hands.  I agree with BankerDanny on the wheels & his comment on why the swing arm was extended, maybe it's modified to fit that rear wheel?  The engine case should have an ID stamp on it with size & serial number stamped on it.  Check the headstock VIN also to see what it says.  I am not sure if the 550 jugs & head would fit the 500 case, others might know.  Maybe he meant it was overbored to the next larger piston size?  Tank is off a different bike as well.  Document & photo everything & we'll try & help you out in the reassembly.  This site is a great source of info. Cheers!
2011, 2012 & 2013 Godzilla Relay Rally Rider
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1972 CB500K1 - restored rider
1981 CB650C - new project

Offline cabrala

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Re: Inherited Cafe?? Project/basket case (1972 cb500)
« Reply #3 on: March 08, 2013, 02:07:07 PM »
That tank looks like a later model 77-78 750K. Definitely an interesting mixture of parts. You'll find engine serial numbers on the top of the case in the space between motor and carbs. The engine displacement should be stamped on the cylinder jugs.
-Alex

'75 CB750F
'77 CB550K
'78 CB550
'93 FZR600

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Offline Drifter

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Re: Inherited Cafe?? Project/basket case (1972 cb500)
« Reply #4 on: March 08, 2013, 07:58:42 PM »
I don't know forsure what he was going for .. I only guessed cafe based on the seat and rear cowl..
tossing around the idea of just taking the engine and parts to a engine builder ..get them to put it together
but wouldn't enven know where to take it... plus I kinda want to unravel this puzzle myself.. with the help of you folks ofcourse :)
1972 CB500 project (boxs of parts)
1976 CB550 project (mostly complete)
1982 xj650 maxim Current Ride
1980 xs400 special runs

Offline cabrala

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Re: Inherited Cafe?? Project/basket case (1972 cb500)
« Reply #5 on: March 08, 2013, 09:10:43 PM »
Do it yourself! The satisfaction of fixing, breaking, riding and fixing (again) will be well worth it. It's what I am doing now and it is just such a great combination of frustration and exhilaration. We are all here for you at the various stages. Don't be afraid to ask. Just keep putting up photos as you have a nice mix of parts that will prove to be an interesting build.
-Alex

'75 CB750F
'77 CB550K
'78 CB550
'93 FZR600

Need a better, newer points cover gasket? How about rubber washers for the headlight bucket? Click the link below:
http://forums.sohc4.net/index.php?topic=122308.0

Offline Retro Rocket

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Re: Inherited Cafe?? Project/basket case (1972 cb500)
« Reply #6 on: March 08, 2013, 11:44:11 PM »
I wonder why he decided to extend the swingarm on a cafe bike? Longer makes sense on a drag bike, but not really for a cafe.

Those wheels look like Kawasaki to me.

+ 1 to everything Danny said... ;)  And welcome aboard.... ;D
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Offline chris mcshifty

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Re: Inherited Cafe?? Project/basket case (1972 cb500)
« Reply #7 on: March 09, 2013, 10:42:54 AM »
Looks interesting maybe he was going for a bratstyle bike

Offline rb550four

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Re: Inherited Cafe?? Project/basket case (1972 cb500)
« Reply #8 on: March 09, 2013, 02:20:24 PM »
Welcome. nice project. Those wheels look Kawasaki to me. I have a pair from a gpz1100 as my avatar, yours may have come from a different machine as you have no disc brake on the rear wheel,I'm guessing at this but I had to take a Kawasaki to buy the Honda twice and the second one was a 650 maybe an '85.  and that looks familiar....a place to start .
  I also took the Kaw swingarm which was 2 inches longer than the 550's, didn't hurt the handling. I do have a 550 semi chop with a 3 inch extended swingarm. drives like a truck. you may find the handling poor and there's plenty of swing arms on Ebay. The travel on the rear is also limited now by the hoop, tire scrub on bumps ,somethings to sort out. The Kaw has a different bolt pattern and depending on which model ,may take a different sized chain than the Honda. I ended up getting the proper sized blank sproket  from a tractor store and had it machined to fit.
   Wondering how both front discs fit into the forks and trees , also front axel? Are those Kaw too? The Hondas are 35mm the Kaw I have is 37mm or 38 ,I forgot off hand. This will be lotsa fun.
A few Honda 500's, a few Honda 550's, a few Honda 650's, '72 cb 450, a couple 500/550/650 hybrids, and 2001 750. 
  550 Snowbike -Somebody had to do it.
  http://forums.sohc4.net/index.php/topic,101678.0.html             
http://forums.sohc4.net/index.php/topic,137317.msg1550907.html#msg1550907

Offline rb550four

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Re: Inherited Cafe?? Project/basket case (1972 cb500)
« Reply #9 on: March 10, 2013, 09:31:12 AM »
I was wondering, looking at your picks, it looks like Honda forks, will the Honda calipers work on the Kaw discs? Is there a allot of Kaw parts in  boxes, like calipers ,forks, swing arm, stuff like that?
  I picked up a 500 a ways back that was "hopped up", 500 heads , 550 aftermarket pistons blah blah.., it was a basket case originally built by a reputable shop... They did not use the 550 jugs, just bored the crap out of the 500 jugs, I went to change the jugs at rebuild time to 550 and it wasn't gonna be a factory fit and would require machine shop time. That would have been good information to have before the bottom end was put back together. you can tell what you have if the CC' cast was left unmolested on the outside front of the jugs ( at least which jugs they started out as), mine were shaved off, so I couldn't tell and didn't think about it until I was at that point of assembly.  I put it back together as the shop built it, took it for a couple of rides, ran good , but parked it anyways, just don't trust those thin cylinder walls. Someone took a bulletproof  engine and shaved it down to something more fragile and in my opinion , less reliable. f you want 550 power in a 500, it's better to go with a  used 550 to start (the bottom end is better too) than to hotrod a 500 , and if that isn't enough, and you want to hotrod the 550 engine, go 650  '79-'82, they all fit in the same cradle.
   I guess the point of all this is that  , that I have found cost savings in upgrading to a larger  stock, dependable Honda engine, without aftermarket parts and machine shop costs. Of course what you choose to do is up to you ,and we'll all watch with interest as your project progress'. I just thought I might throw that out since you are at the start and could use ideas.
   There is no substitute for cubic displacement if you want power, it's easier and less costly to swap into a larger displacement motor that is a factory fit, than it is to make a little more power in a smaller engine,  and rebuilding your own engine is a rewarding, addictive activity that has much in common with potatoe chips.
A few Honda 500's, a few Honda 550's, a few Honda 650's, '72 cb 450, a couple 500/550/650 hybrids, and 2001 750. 
  550 Snowbike -Somebody had to do it.
  http://forums.sohc4.net/index.php/topic,101678.0.html             
http://forums.sohc4.net/index.php/topic,137317.msg1550907.html#msg1550907

Offline Drifter

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Re: Inherited Cafe?? Project/basket case (1972 cb500)
« Reply #10 on: March 11, 2013, 06:10:07 AM »
not sure what those forks are. this thread may be a bit premature as i wont have access to the frankenbike (my wife named it) for some time. I need to find space in the basment and garage for all the bits then arange shipping it up.I still have to change the ownership over to my name too .. which may take some time as i need to jumpthrough some extra hoops cause previous owner is no longer amoung the living.

Would be intrested to find other in Ontario Canada who have dealt with ownership issues
perhaps someone could tell me what i meed to do to get the 76'cb550 papered, I am told it is possible but wouldnt know the steps

/edit ... search function on this site is very useful ..  ;D
http://forums.sohc4.net/index.php?topic=59775.0
« Last Edit: March 11, 2013, 06:15:43 AM by Drifter »
1972 CB500 project (boxs of parts)
1976 CB550 project (mostly complete)
1982 xj650 maxim Current Ride
1980 xs400 special runs

Offline chris mcshifty

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Re: Inherited Cafe?? Project/basket case (1972 cb500)
« Reply #11 on: March 11, 2013, 10:14:04 AM »
I have exact same wheels on my kz750. Thinking about putting them on my cb500

Offline Scott S

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Re: Inherited Cafe?? Project/basket case (1972 cb500)
« Reply #12 on: March 11, 2013, 07:12:31 PM »
I have exact same wheels on my kz750. Thinking about putting them on my cb500


 If you do this, let me know what it takes to make it work. There are a couple of sets at local junkyards. But isn't the rear a 16"?
'71 CB500 K0
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Offline chris mcshifty

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Re: Inherited Cafe?? Project/basket case (1972 cb500)
« Reply #13 on: March 11, 2013, 10:11:18 PM »
I'll have to look and see I don't know off the top of my head