Author Topic: 1978 CB750K — Post 836 OIL PRESSURE - Hopefully Good!?  (Read 249451 times)

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Offline SKTP

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1175 on: September 18, 2017, 10:42:07 AM »
Showed it at the Venice Vintage Motorcycle show. It ran well, I am not used to the LA freeways anymore. It's been awhile (60 miles round trip). I have a small leak from the clutch cover. That one is new to me...it is fairly minor, but it lands on the exhaust and makes it smoke a little. Will investigate. My Speedo and tach work now...so that's a good thing

1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
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AirCanuck

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1176 on: September 18, 2017, 12:33:31 PM »
Showed it at the Venice Vintage Motorcycle show. It ran well, I am not used to the LA freeways anymore. It's been awhile (60 miles round trip). I have a small leak from the clutch cover. That one is new to me...it is fairly minor, but it lands on the exhaust and makes it smoke a little. Will investigate. My Speedo and tach work now...so that's a good thing



this baby fills me with desire.  That is a seriously beautiful bike.

Offline SOHC4 Cafe Racer Fan

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1177 on: September 18, 2017, 08:05:23 PM »
Nice photo, Chris. I missed the show this year.  How was it?
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 SKTP

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1178 on: September 19, 2017, 11:34:45 AM »
Here's a few more pictures if you're interested...mostly Hondas

http://fastback1000.tumblr.com/post/165480164796
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

AirCanuck

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1179 on: September 19, 2017, 12:21:39 PM »
Here's a few more pictures if you're interested...mostly Hondas

http://fastback1000.tumblr.com/post/165480164796

neat side-covers on the last one. I see he has pods... what was he hiding behind there?

Offline SKTP

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1180 on: September 19, 2017, 12:31:29 PM »
Here's a few more pictures if you're interested...mostly Hondas

http://fastback1000.tumblr.com/post/165480164796

neat side-covers on the last one. I see he has pods... what was he hiding behind there?

That's the oil tank

http://www.pipeburn.com/home/2017/09/01/old-gold-honda-78-cb750-supersport-kott-motorcycles.html
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

AirCanuck

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1181 on: September 19, 2017, 01:04:53 PM »
ah didn't notice it was a 750 and not a 550, don't know my bikes too well yet.

Thanks!

I've been toying with the idea of ditching pods and putting on stock filters and an airbox if I find that the pods give performance issues (I've heard they can in wet or gusty weather) so I like to see interesting side covers.

thanks again

Offline Stev-o

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1182 on: September 19, 2017, 04:49:02 PM »
I love Venice Beach!  Some very nice bikes there.

Have you ever heard of/been too the Boomerang Outback Shack?
Had a great time there!!

'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: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1183 on: September 19, 2017, 09:02:13 PM »
Here's a few more pictures if you're interested...mostly Hondas

http://fastback1000.tumblr.com/post/165480164796

neat side-covers on the last one. I see he has pods... what was he hiding behind there?

I think that's Dustin's latest SS.  That's an oil tank.
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

AirCanuck

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1184 on: September 20, 2017, 04:11:06 PM »
Here's a few more pictures if you're interested...mostly Hondas

http://fastback1000.tumblr.com/post/165480164796

neat side-covers on the last one. I see he has pods... what was he hiding behind there?

I think that's Dustin's latest SS.  That's an oil tank.

Yeah, thought it was a 550... still learning. How many of you folks know each other, that you're able to id each other's bikes by sight?

Offline SOHC4 Cafe Racer Fan

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1185 on: September 20, 2017, 10:34:03 PM »
Here's a few more pictures if you're interested...mostly Hondas

http://fastback1000.tumblr.com/post/165480164796

neat side-covers on the last one. I see he has pods... what was he hiding behind there?

I think that's Dustin's latest SS.  That's an oil tank.

Yeah, thought it was a 550... still learning. How many of you folks know each other, that you're able to id each other's bikes by sight?

Dustin has a signature style, especially as to his seats and oil tanks.  He's somewhat local.  Very nice guy.  I see him at lots of shows/events.
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 SKTP

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1186 on: October 10, 2017, 11:51:34 AM »
It never ends...so now I have some sort of leak on the lower right hand side...I think clutch cover but I will have to do some more investigating...also I need to either just sell it and get a more modern bike or get cartridge-emulations and new front springs...because it feels gross turning at speed
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
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Offline calj737

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Re: 1978 CB750K — It never ends!
« Reply #1187 on: October 10, 2017, 12:43:48 PM »
Cartridges will help. But nothing will ever make a 40 year old bike feel or behave like a modern bike. Steel technology, frame geometry, suspension technology, tire compound and profiles, shocks, etc all contribute to modern behavior. You’ll do well to upgrade yours, then love it for what it is and enjoy the heck out of it. Maybe get another, newer bike to satisfy your needs and keep this one to satisfy your soul
'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: 1978 CB750K — It never ends!
« Reply #1188 on: October 10, 2017, 05:29:58 PM »
..because it feels gross turning at speed

What air pressure you run? Try pumping it up to 38-40 and see how that feels.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline SKTP

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Re: 1978 CB750K — It never ends!
« Reply #1189 on: October 11, 2017, 12:14:35 PM »
Clutch side drips...I also have not enough to actually drip over on the left side of the head...HOW? I think I am almost ready to give up and sell this thing.

Like it fully works and I know old bikes leak...but maybe it is time

1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
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Offline 754

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Re: 1978 CB750K — It never ends!
« Reply #1190 on: October 11, 2017, 02:37:01 PM »
Its not the end of the world a bit of weeping.
 Question for you, are you filing the covers flat or I mean checking them as you put it together..
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline SKTP

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Re: 1978 CB750K — It never ends!
« Reply #1191 on: October 11, 2017, 02:45:36 PM »
That's a good point...I will replace and check the clutch cover at the next oil change...the lesser drips might just be carb overflow (maybe if I am lucky). But the clutch one goes right onto my exhaust pipes and smokes

The Head weeping is what really is pissing me off...I have them resurfaced. NOS OEM Honda Head gasket. Pucks sealed exactly as the HondaMan book says...its far less of a leak/weap then my first 2 tries, but WTF....
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

Offline 754

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Re: 1978 CB750K — It never ends!
« Reply #1192 on: October 11, 2017, 02:54:37 PM »
Ok just remember, clean steel wool to clean the pipes.  Use with water or soapy water. Rinse with water.
 Best not done on a nice driveway as could leave rust specs, lawn or pavement ok.
 Brillo or other scouring pad, will dull down your chrome..big ouch.
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline MCRider

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Re: 1978 CB750K — It never ends!
« Reply #1193 on: October 11, 2017, 04:22:31 PM »
That's a good point...I will replace and check the clutch cover at the next oil change...the lesser drips might just be carb overflow (maybe if I am lucky). But the clutch one goes right onto my exhaust pipes and smokes

The Head weeping is what really is pissing me off...I have them resurfaced. NOS OEM Honda Head gasket. Pucks sealed exactly as the HondaMan book says...its far less of a leak/weap then my first 2 tries, but WTF....

Have you got a frame kit? Short time to re-torque it.
Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline Tintop

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Re: 1978 CB750K — It never ends!
« Reply #1194 on: October 11, 2017, 04:32:14 PM »

Have you got a frame kit? Short time to re-torque it.

I might still have one of the original frame kits on a shelf.  Let me know if your interested.
1977 CB550/4 Cafe - Speed Warrior / BOTM 03/11
1980 CB750F (project)
Whittaker GBF Vintage Racing Sidecar (XS750 power) - ITG / 151's / CMR Racing Products (SOLD)
1976 CB400 SS - stock / BOTM 04/11 (SOLD)
1973 CB750 K - basket case (SOLD)
77 CB550 Cafe build
550/750 Filter Thread
Sidecar Rebuild Thread

Offline SOHC4 Cafe Racer Fan

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Re: 1978 CB750K — It never ends!
« Reply #1195 on: October 11, 2017, 04:39:23 PM »
Chris,
Did you use the HD studs. These can accept much higher torque values.  I may have an extra set of studs if you're crazy enough to go there!
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 SKTP

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Re: 1978 CB750K — It never ends!
« Reply #1196 on: October 11, 2017, 04:40:05 PM »
Do they really not effect the stiffness of the frame? I don't see how they couldn't...cutting the top tubes seems pretty scary to me...especially when the bike is already so bumpy on the freeway
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

Offline SKTP

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Re: 1978 CB750K — It never ends!
« Reply #1197 on: October 11, 2017, 04:41:40 PM »
I did not use HD studs. But I think at this point I really could take the engine out, disassemble and reassemble in 2 weekends

I am seriously considering just selling it and getting the RC...I never thought I would even consider selling it...but I can totally see it now
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

Offline Tintop

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Re: 1978 CB750K — It never ends!
« Reply #1198 on: October 11, 2017, 04:50:20 PM »
Do they really not effect the stiffness of the frame? I don't see how they couldn't...cutting the top tubes seems pretty scary to me...especially when the bike is already so bumpy on the freeway

You only cut the bottom two, and the plates on either side that connect them to the top tube.  The original kit welds / bolts in, the later version uses multi bolted clamps.  It's a great looking bike, stick with it....and be thankful it isn't British. ::) ;D ;D ;D
1977 CB550/4 Cafe - Speed Warrior / BOTM 03/11
1980 CB750F (project)
Whittaker GBF Vintage Racing Sidecar (XS750 power) - ITG / 151's / CMR Racing Products (SOLD)
1976 CB400 SS - stock / BOTM 04/11 (SOLD)
1973 CB750 K - basket case (SOLD)
77 CB550 Cafe build
550/750 Filter Thread
Sidecar Rebuild Thread

Offline SKTP

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Re: 1978 CB750K — It never ends!
« Reply #1199 on: October 11, 2017, 05:09:59 PM »
http://forums.sohc4.net/index.php?topic=160335.0

http://forums.sohc4.net/index.php?topic=140654.0

Oh I see...I always imagined all the tubes getting cut...that makes far more sense

I will have to think about it. I am tired of putting this much money and effort into this bike right now
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90