Author Topic: '71 CB500 Four Scrambler  (Read 23268 times)

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Offline Stev-o

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #100 on: April 01, 2018, 02:00:28 pm »
Ouch!

That needs some real work to be made right.

Not worth the effort, I'd find a nice replacement.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline DurangoCB

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #101 on: April 01, 2018, 03:54:16 pm »
Thanks, guys. I’ll start looking around.

So it sounds like that cover is serving some structural function vs simply serving as a cover and anchoring the clutch cable housing.  True?

What if I'm not all that worried about the cosmetics of the cover?  Those cracks are serious, however, you can't get any of the metal to flex by hand.  It's pretty solid. 
« Last Edit: April 01, 2018, 05:14:11 pm by DurangoCB »
1971 CB500 Four- current project http://forums.sohc4.net/index.php/topic,170622.0.html
1978 CX500- next in line

Offline 02z06dave

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #102 on: April 01, 2018, 06:07:57 pm »
its cosmetic

Offline calj737

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #103 on: April 01, 2018, 07:20:10 pm »
Because its a 500 not a 550, the clutch is operated from that side. Currently, the damage is cosmetic. Those types of cracks are prone to extending, and then it will become structural. Since its below the clutch cam, I would worry about it sooner rather than later.

Sorry.
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"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 DurangoCB

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #104 on: April 01, 2018, 07:44:12 pm »
Hey, it is what it is. Thanks for your help. The crack is up above the shift lever though, at the top of the cover.  But that probably makes little difference. 
1971 CB500 Four- current project http://forums.sohc4.net/index.php/topic,170622.0.html
1978 CX500- next in line

Offline calj737

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #105 on: April 02, 2018, 04:14:43 am »
Hey, it is what it is. Thanks for your help. The crack is up above the shift lever though, at the top of the cover.  But that probably makes little difference.
It just makes it worse actually. Keep an eye out for a replacement.
'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 DurangoCB

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #106 on: April 09, 2018, 07:44:44 pm »
The postman brought a few goodies I needed to keep this project moving forward.
 
Grips and J.Webster handlebar clamps, engine oil seals, wheel bearings, all 4into1.com.  Ordered Saturday, delivered Monday.  Somebody's working weekends. Brass swingarm bushings from Kenosha Kid. A set of brand new Dunlop K70 tires I found on CL for $90.
 
Finally received the Made and Shipped on a Slow Boat to China seat that I needed in order to karate chop the subframe and begin refining the details of the brake/tail/turn LEDs.  If some abominable hipster is out there with huge regrets over having modified his/her CB500, the tail I chopped off is available.  :P  Regretful hipster just pays shipping.
 
Another few hours of work and ready for the powder shop and digging into the engine a bit more, starting with replacing as many seals as I can get to.
« Last Edit: April 09, 2018, 07:54:19 pm by DurangoCB »
1971 CB500 Four- current project http://forums.sohc4.net/index.php/topic,170622.0.html
1978 CX500- next in line

Offline calj737

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #107 on: April 10, 2018, 03:42:58 am »
I hope you'll rebuild the oil pump. Member Elan has a complete kit including the unobtainable internal O-ring.
'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 Scramps

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #108 on: April 10, 2018, 03:00:06 pm »
I’m worried about my oil pump now. Is it a common issue with the 500s?


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Offline Stev-o

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #109 on: April 10, 2018, 03:27:29 pm »
I’m worried about my oil pump now. Is it a common issue with the 500s?


No, just Cal's!  His hasnt worked in at least two years now!!
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline calj737

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #110 on: April 10, 2018, 03:31:49 pm »
I’m worried about my oil pump now. Is it a common issue with the 500s?


No, just Cal's!  His hasnt worked in at least 31 years now!!
FTFY, Wise Guy  ;D

Rebuilding the oil pump at this point is good hygiene. It will never be easier, and doing it now is inexpensive, preventative maintenance, especially on an unknown motor.
'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 DurangoCB

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #111 on: April 10, 2018, 03:39:47 pm »
I'll definitely get that done, cal.  Thanks for looking out!  Please keep an eye on me... I'm bound to do some stupid #$%*.
1971 CB500 Four- current project http://forums.sohc4.net/index.php/topic,170622.0.html
1978 CX500- next in line

Offline Scramps

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #112 on: April 10, 2018, 03:43:12 pm »
Cool cool cool, I can deal with that. Does it come out from the side or am I in for another case splitting?

Offline DurangoCB

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #113 on: April 10, 2018, 04:37:14 pm »
Can someone confirm that this throttle will work on my CB500?  I have a replacement MC/lever and non-stock switches. 

http://4into1.com/motion-pro-push-pull-throttle-black/



The bike came with a new set of push/pull cables from 4into1.com so I have those already. 
1971 CB500 Four- current project http://forums.sohc4.net/index.php/topic,170622.0.html
1978 CX500- next in line

Offline calj737

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #114 on: April 10, 2018, 05:21:49 pm »
Cool cool cool, I can deal with that. Does it come out from the side or am I in for another case splitting?
Yes, under the left shift cover.
'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 calj737

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #115 on: April 10, 2018, 05:23:04 pm »
Can someone confirm that this throttle will work on my CB500?  I have a replacement MC/lever and non-stock switches. 
Should be fine, but you’ll likely need to trim the length.
'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 Scramps

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'71 CB500 Four - Brat/Scrambler/whatever
« Reply #116 on: April 10, 2018, 05:23:38 pm »
Durango, that’s the same throttle I got for mine, it’s a little cheap-feeling, but it works well.

Seconded on the trimming that cal mentioned, I had to take about 3/8” off for my grips
« Last Edit: April 10, 2018, 05:49:59 pm by Scramps »

Offline Scramps

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #117 on: April 10, 2018, 07:00:15 pm »
I have a replacement MC/lever and non-stock switches. 

What kind of switches did you get? I’m on the fence about keeping mine

Offline DurangoCB

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #118 on: April 10, 2018, 07:25:38 pm »
I'm rewiring my bike and running an m-unit.  I'm going to use these momentary push buttons.  Two on the left will control the L TURN and HORN, two on the right will control R TURN and HEADLIGHT. 



Revival sells the same buttons but they're something like $20 ea.  The eBay buttons are 4 for $10 and they actually have a slightly better water-resistance rating.  I'm on the hunt for saddle washers that will allow them to sit more flush with the handlebars. 

By the way, the guys at Revival Cycles have been really generous with their time and help and I intend to purchase everything I can (afford) from them. 



1971 CB500 Four- current project http://forums.sohc4.net/index.php/topic,170622.0.html
1978 CX500- next in line

Offline DurangoCB

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #119 on: April 10, 2018, 07:26:37 pm »
Hey, it is what it is. Thanks for your help. The crack is up above the shift lever though, at the top of the cover.  But that probably makes little difference.
It just makes it worse actually. Keep an eye out for a replacement.

Marissa came through with the assist. 
1971 CB500 Four- current project http://forums.sohc4.net/index.php/topic,170622.0.html
1978 CX500- next in line

Offline SOHC4 Cafe Racer Fan

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #120 on: April 12, 2018, 10:31:32 am »
Can someone confirm that this throttle will work on my CB500?  I have a replacement MC/lever and non-stock switches. 

http://4into1.com/motion-pro-push-pull-throttle-black/



The bike came with a new set of push/pull cables from 4into1.com so I have those already.

It should work. Motion Pro makes a nicer one, too.
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"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)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline SOHC4 Cafe Racer Fan

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #121 on: April 12, 2018, 10:33:12 am »
I'm rewiring my bike and running an m-unit.  I'm going to use these momentary push buttons.  Two on the left will control the L TURN and HORN, two on the right will control R TURN and HEADLIGHT. 



Revival sells the same buttons but they're something like $20 ea.  The eBay buttons are 4 for $10 and they actually have a slightly better water-resistance rating.  I'm on the hunt for saddle washers that will allow them to sit more flush with the handlebars. 

By the way, the guys at Revival Cycles have been really generous with their time and help and I intend to purchase everything I can (afford) from them.

I'm not sure about the vendor on those switches.  Another option is Motone.  They have nice dual and triple button switches.  http://motone.com/universal-parts/
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"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)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline DurangoCB

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #122 on: April 12, 2018, 10:54:29 am »
I'm not sure about the vendor on those switches.  Another option is Motone.  They have nice dual and triple button switches.  http://motone.com/universal-parts/

Motone has some great wares.  Love the turn signal brackets for the fork legs.  I have to reign in the budget a little if I'm going to get this bike done by the end of summer. 

The postman just dropped off the mini push buttons, so I'll test them out soon. 
1971 CB500 Four- current project http://forums.sohc4.net/index.php/topic,170622.0.html
1978 CX500- next in line

Offline DurangoCB

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #123 on: April 12, 2018, 11:04:46 am »
Can someone confirm that this throttle will work on my CB500?  I have a replacement MC/lever and non-stock switches. 

It should work. Motion Pro makes a nicer one, too.

The Rev2, right?  I think it's like $165.  Ouch.
1971 CB500 Four- current project http://forums.sohc4.net/index.php/topic,170622.0.html
1978 CX500- next in line

Offline SOHC4 Cafe Racer Fan

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Re: '71 CB500 Four - Brat/Scrambler/whatever
« Reply #124 on: April 12, 2018, 02:43:21 pm »
The Rev2 is the more premium one they offer.  I don't think that you have to go that whole-hog, but I like it because you can easily swap out the cams for different twist ratios.
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"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)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold