Author Topic: A glutton for punishment... 1973 CB500 resto-mod  (Read 41750 times)

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Offline Scott S

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A glutton for punishment... 1973 CB500 resto-mod
« on: September 27, 2016, 11:02:18 AM »
 I've known about this bike for a few years. The owner approached me at breakfast a few years ago after seeing my 550 in the parking lot. Then...he wouldn't sell. I'd occasionally call and ask him about it. After I gave up on it, he started calling me!
 I think the city is starting to get on him about his property. Imagine an episode of Hoarders meets American Pickers. There are four old Mopars and a bunch of Ford and Mopar big blocks there, too.
 The bike is a '73 CB500. It was rough when I first saw it a few years ago and has only gotten worse. He bought it in '74 and parked it in '81. This is what happens when you leave a bike in a leaky shed for 35 years.

As found.



 First time it saw daylight in 35 years.




 
 The gas tank was as thin as a beer can when I first saw it. It obviously got worse...
 For some reason, he wanted to keep it and the tag. I was more than happy to leave that mess in his yard.



 The bike was right across town.  I also drove 4 hours round trip to pick up a pair of 550 engines. One is an F model and is locked up and missing a few pieces, the other is a K model and complete, free and with good compression.



 I almost backed out on the bike after seeing it. The ONLY reason I went through with it is that a title is available (we're both still working with the DMV since it's lost somewhere in his parts hoard) and I have TONS of 500/550 stuff, including another good 500 engine/carbs, a tank, seat, side covers, exhaust, etc., etc., etc.
 It wouldn't be worth saving if I didn't already have most of the parts.
 Total for all of this: about $300.
« Last Edit: February 05, 2017, 05:01:44 AM by Scott S »
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline rocket johnny

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Re: A glutton for punishment...or, this weeks haul
« Reply #1 on: September 27, 2016, 11:10:38 AM »
good score !   

Offline grcamna2

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Re: A glutton for punishment...or, this weeks haul
« Reply #2 on: September 27, 2016, 11:32:26 AM »
I think it's good you have another tank for that CB500,title!
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
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Offline flybox1

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Re: A glutton for punishment...or, this weeks haul
« Reply #3 on: September 27, 2016, 11:36:11 AM »
Yeah...thats good money if you are stocked w what you need.
Good luck bringing it back.
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
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Offline ekpent

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Re: A glutton for punishment...or, this weeks haul
« Reply #4 on: September 27, 2016, 03:52:29 PM »
 Never seen a tank rot out that bad on the top before. Did it still have a bottom ?

Offline BomberMann650

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Re: A glutton for punishment...or, this weeks haul
« Reply #5 on: September 27, 2016, 03:53:30 PM »
Such a perfect patina  ;D

Offline Lostboy Steve

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Re: A glutton for punishment...or, this weeks haul
« Reply #6 on: September 27, 2016, 06:28:11 PM »
That tank is almost a trophy. Hang it somewhere.


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Offline Stev-o

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Re: A glutton for punishment...or, this weeks haul
« Reply #7 on: September 27, 2016, 06:52:41 PM »
Never seen a tank rot out that bad on the top before.

+1. Never....
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline Scott S

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Re: A glutton for punishment...or, this weeks haul
« Reply #8 on: September 27, 2016, 07:09:05 PM »
Never seen a tank rot out that bad on the top before. Did it still have a bottom ?

 Yes, thank goodness. It was about half full with rain water and that awful varnishy gas smell. I was more than happy to leave it behind.
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline Scott S

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Re: A glutton for punishment...or, this weeks haul
« Reply #9 on: September 27, 2016, 07:10:28 PM »
That tank is almost a trophy. Hang it somewhere.


 I think that was his plan....I have no idea why he wanted it. As he was removing the license plate, he said "1981...the year my daughter was born. That's why I parked the bike".
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline 70CB750

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Re: A glutton for punishment...or, this weeks haul
« Reply #10 on: September 28, 2016, 06:18:18 AM »
Score!
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Offline Duanob

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Re: A glutton for punishment...or, this weeks haul
« Reply #11 on: September 28, 2016, 08:29:27 AM »
The Good, The Bad, and The Ugly, that 500 has all three! :) Good luck.
"Just because you flush a boatload of money down the toilet, doesn't make the toilet worth more",  My Stepfather the Unknown Poet

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Offline Scott S

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Re: A glutton for punishment...or, this weeks haul (New haul 10/3!)
« Reply #12 on: October 03, 2016, 11:56:04 AM »
 Picked all this up today! Let's just say it was a STEAL!!



 I grabbed the CL bars because they had a good RH control. The LH is reproduced but the RH with the brake perch is hard to find. This is a good one with uncut wires and good bullets!

 The finned covers seem to be 750 and I'll be listing them for sale soon. Not sure what the seat fits. It's actually cut around the shock mounts and rear fender for my CL350 but is curved up at the front. The bigger score is the old school Lucas light. That's not a cheapo version, but the heavy cast aluminum one.





 These are at a slight angle on a 550 stator, so I'm guessing they're for a CB750.


'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline Scott S

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Re: A glutton for punishment...or, this weeks haul (New haul 10/3!)
« Reply #13 on: October 03, 2016, 11:58:54 AM »
 Oh....and Yes! That is a set of CB500/550 Lester's with an 18" rear!!!!
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline Bankerdanny

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Re: A glutton for punishment...or, this weeks haul (New haul 10/3!)
« Reply #14 on: October 03, 2016, 02:34:24 PM »
Wow, that tank is amazing (and not in a good way).

Congrats on the Lesters. I love how they look on my 550.
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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 Scott S

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Re: A glutton for punishment...or, this weeks haul (New haul 10/3!)
« Reply #15 on: February 05, 2017, 05:00:30 AM »
 Think I'll move this one to the Projects board, since I've actually gotten started on it now.
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline Scott S

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Re: A glutton for punishment... 1973 CB500 resto-mod
« Reply #16 on: February 05, 2017, 05:47:04 AM »
 Over the last month or so I've hosed off the carcass....



 ...and pulled the engine and stripped the frame. I wire wheeled the rough spots and sprayed it with rust converter, just to stop the creep of decay!

'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline Scott S

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Re: A glutton for punishment... 1973 CB500 resto-mod
« Reply #17 on: February 05, 2017, 05:50:46 AM »
 Picked up a complete Yamaha R6 front end for a great price.




 And have started on the conversion (thanks to the help of a friend that works at a race shop and has excellent machining skills!)

'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline Scott S

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Re: A glutton for punishment... 1973 CB500 resto-mod
« Reply #18 on: February 05, 2017, 05:56:08 AM »
 Did some porting and polishing. I'll be going with 1.00mm over intake valves and new exhaust valves. I clearanced the head for a CB650 cam. The plan is to take .020" off the head and use a .040" MLS head gasket. That will tighten up the deck height and, hopefully, improve the quench. I'm still considering getting an .010 base gasket to get it down a little closer to optimal, but just not sure if it's worth chasing that last little bit.


'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline Scott S

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Re: A glutton for punishment... 1973 CB500 resto-mod
« Reply #19 on: February 05, 2017, 05:57:53 AM »
 The seat on the bike looked to be in great shape. But when I started cleaning it up and using vinyl/leather conditioner on it, the cover cracked.
 So I picked up an NOS seat. Sweet.


'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline Scott S

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Re: A glutton for punishment... 1973 CB500 resto-mod
« Reply #20 on: February 05, 2017, 06:01:03 AM »
 I tore down the top end of one of the spare 550 motors. Had a little vapor blasting done yesterday.

 Before:



 After:



 The pistons came out nice, too.



« Last Edit: February 05, 2017, 06:28:08 AM by Scott S »
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline Scott S

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Re: A glutton for punishment... 1973 CB500 resto-mod
« Reply #21 on: February 05, 2017, 06:09:10 AM »
 And I guess I can let the cat out of the bag now...
 The part I'm most excited about are these hand made pipes. I LOVE the look of the curved RC style Honda race pipes. The Benelli racers also used them (also called Passollini replica pipes).
 I found a guy in Spain that makes these. Curved mufflers, removable curved baffles. The following pics are my actual pipes, under construction. They're done now and here, sitting in the spare bedroom just waiting!





  This will give you an idea of what they'll look like on the bike.


« Last Edit: February 05, 2017, 06:12:57 AM by Scott S »
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline calj737

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Re: A glutton for punishment... 1973 CB500 resto-mod
« Reply #22 on: February 05, 2017, 06:54:41 AM »
Envious!
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Stev-o

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Re: A glutton for punishment... 1973 CB500 resto-mod
« Reply #23 on: February 05, 2017, 07:40:54 AM »
Envious!

+1.  Those pipes look fantastic.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline SOHC4 Cafe Racer Fan

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Re: A glutton for punishment... 1973 CB500 resto-mod
« Reply #24 on: February 05, 2017, 09:07:15 AM »
This thread just hit "Projects" today and I cannot believe how much it got better and better with the posts!!

Great score on the bike and parts.  Holy shnikes, those Lesters and an 18" rear, too!

Love the R6 front conversion. I have a spare one of those from a 2001 or 2003 that I'm saving for a rainy day.

Nice job on the ports!

Vapor blasting is an amazing thing.  Who freakin' knew??

But the creme de la creme -- those beautiful pipes!!  Very Benneli-esque!

SUBSCRIBED!!!
« Last Edit: February 05, 2017, 09:14:49 AM by CB750 Cafe Racer Fan »
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
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"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

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