Author Topic: 1978 CB750K — Post 836 OIL PRESSURE - not good  (Read 247886 times)

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Offline SKTP

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1125 on: May 30, 2017, 11:19:49 AM »
I have barely run it...not out of the woods yet...but so far so good :)

UPDATE PIC UPLOAD:

Frank these polished up really nicely:



New Clutch friction disk B...I got all new As too...but they are spiral cut and the Hondaman book says those are wrong. Looking into returning them. But I checked all my old ones and they were in spec and looked good (not like that one! No wonder I had slip!)

I learned to put and tighten the lines on BEFORE you put the oil tank in the frame. MUSH EASIER!

This bad boy sure is hard to put on....need to try again...I have a leak at spigot #4 and where they join at the collector...

New crush gaskets...I guess you never really need to change these on the old style spigots?

Got Lanesplitters...actually running them upside down, not like this...I think I like them


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« Last Edit: June 08, 2017, 10:34:16 AM by SKTP »
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
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Offline 754

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1126 on: May 30, 2017, 11:35:18 PM »
Damn nice looking exhaust...
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 USMC5811

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1127 on: May 30, 2017, 11:50:02 PM »
I have barely run it...not out of the woods yet...but so far so good :)

UPDATE PIC UPLOAD:

Frank these polished up really nicely:



New Clutch friction disk B...I got all new As too...but they are spiral cut and the Hondaman book says those are wrong. Looking into returning them. But I checked all my old ones and they were in spec and looked good (not like that one! No wonder I had slip!)

I learned to put and tighten the lines on BEFORE you put the oil tank in the frame. MUSH EASIER!

This bad boy sure is hard to put on....need to try again...I have a leak at spigot #4 and where they join at the collector...

New crush gaskets...I guess you never really need to change these on the old style spigots?

Got Lanesplitters...actually running them upside down, not like this...I think I like them

I run mine upside down too
Love 'em that way


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Offline SKTP

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1128 on: June 10, 2017, 07:48:46 PM »
So here's the report.

The bike starts right up. But for about 5 minutes if you give it gas it bogs. Then once it's warmed up and let's you give it gas, it runs great. Lots of popping on deceleration. Pulls well. Clutch feels great. No leaks so far.

I'm going to static time it tomorrow.
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
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2004 Honda CR-V
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Offline MauiK3

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1129 on: June 11, 2017, 08:05:55 PM »
Sounds like a lean running condition. Might have to get into one or more carbs.
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline 754

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1130 on: June 11, 2017, 08:54:27 PM »
 It better be running this year..buddy...dont make me come down there..
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 RUNS — Third time's a charm
« Reply #1131 on: June 12, 2017, 10:34:26 AM »
Please do come down here...but IT RUNS!!! And I am out driving it...

It currently is slow to warm up. I tried to statci time it...but I am not sure if I really undertstand how to do it. I tried 2 different methods. One with a 9V battery hooked up so it goes out when the gap closes and the other way using the bike's battery so it goes ON with the points gap closes....I thought the time the gap is closed would be really short and tell you exactly were to set it...but it is pretty long and I think just guessing and turning is slightly and testing is going to be the method. Am I missing something?

It is popping more than than it used to when I am off the gas. But it pulls better than it ever has, when I am on the gas...

I finally counted off the speedo-drive-turns to send the BlackBomber speedo out to be recalibrated



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« Last Edit: June 13, 2017, 10:53:52 AM by SKTP »
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
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Offline SOHC4 Cafe Racer Fan

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1132 on: June 12, 2017, 11:18:36 AM »
I'll have to keep my eyes peeled for you in Long Beach, Chris.
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 #1133 on: June 19, 2017, 11:07:59 AM »
So far so good...No leaks so far (that stain is an old one on the garage floor)

I have yet to start it with the kick starter but it starts with the electric...still tweaking and tuning but mostly just riding


1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
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Offline seanbarney41

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1134 on: June 19, 2017, 06:19:26 PM »
God, if that runs even half as good as it looks, you should be very happy...really happy to see that seat back on there
If it works good, it looks good...

Offline SKTP

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1135 on: June 19, 2017, 06:47:23 PM »
Thanks....I am tempted to just go 100% all in on the solo set up and get these:

https://cognitomoto.com/collections/cognito-moto-originals/products/cb750-billet-aluminum-rearset-brackets
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 seanbarney41

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1136 on: June 19, 2017, 07:09:52 PM »
those look pretty good and no reason to lose the passenger pegs...I am betting you will have few problems squeezing some fine little thing onto that Giuliari, nice and cozy
If it works good, it looks good...

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1137 on: June 19, 2017, 10:20:00 PM »
I picked a pair of these up for my Tarozzi rearsets on my 650/550 build.  Great looking Cognitomoto product, as usual.
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 #1138 on: June 20, 2017, 04:40:15 PM »
https://japan.webike.net/products/21554410.html

Pretty sure I am ordering this Master. Any thoughts on it or Webike?
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
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Offline SKTP

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1139 on: June 26, 2017, 10:36:33 AM »


I drove it 115 miles this weekend. So far so good. New Master I ordered from Dime City arrives today. Can't wait to try it out!

Next; Front forks.
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
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Offline MauiK3

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1140 on: June 26, 2017, 10:38:06 AM »
that really looks great!!
1973 CB 750 K3
10/72 build Z1 Kawasaki

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1141 on: June 26, 2017, 10:47:05 AM »


I drove it 115 miles this weekend. So far so good. New Master I ordered from Dime City arrives today. Can't wait to try it out!

Next; Front forks.

I didn't make it to BF9 yesterday.  It was too stinking hot.  The bike looks great, Chris.  What are you planning to do to the forks?
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 #1142 on: June 26, 2017, 10:50:20 AM »
The forks are original to my knowledge. I am thinking I will talk to Race-Tech

http://www.racetech.com/

And yes, I think it will be my last born-free...it is not my scene. It was a fun ride regardless.
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 SOHC4 Cafe Racer Fan

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1143 on: June 26, 2017, 11:15:39 AM »
The forks are original to my knowledge. I am thinking I will talk to Race-Tech

http://www.racetech.com/

And yes, I think it will be my last born-free...it is not my scene. It was a fun ride regardless.

It's definitely a different scene.  I like the trackers and invited builder customs.  There are definitely plenty of girls with daddy issues to make it somewhat entertaining.
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 seanbarney41

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1144 on: June 26, 2017, 05:11:39 PM »
racetech stuff in my forks was one of the best upgrades I ever did :)
If it works good, it looks good...

Offline SOHC4 Cafe Racer Fan

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1145 on: June 26, 2017, 05:13:10 PM »
racetech stuff in my forks was one of the best upgrades I ever did :)

I've used Race Tech for 2 of my projects.  Both have been an decent improvement over stock.
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 #1146 on: June 26, 2017, 05:20:54 PM »
How does it work? Did you guy physically take your bikes there? I always hear that they are set up for your bike+ your weight...ball park cost?

Yes, I will call them ;)
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 seanbarney41

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1147 on: June 26, 2017, 05:33:17 PM »
yep, just call or email...they do all the tech for you.  Installing the parts is fairly simple.  If you can drill metal and take your forks apart, you are golden.  I asked them for an initial set-up for the adjustments, and it is spot on, I have found no reason to fiddle with their adjustment suggestions.
If it works good, it looks good...

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1148 on: June 26, 2017, 06:12:31 PM »
If you run into any glitches, call Matt Wiley (in their Arizona office). He is their vintage bike specialist - helps set up bikes for vintage racing.
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 Restoration Fan

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Re: 1978 CB750K - IT RUNS — Third time's a charm
« Reply #1149 on: June 27, 2017, 01:42:06 AM »
There are definitely plenty of girls with daddy issues to make it somewhat entertaining.
Pics or it didn't happen!  ;)

Oh, and Chris....the bike looks phenomenal.  Great work!
Ron

Stella - Logan's Senior Project    78 750K http://forums.sohc4.net/index.php?topic=141761.0

Logan's Reward - CB500 and CB550 Cafes    http://forums.sohc4.net/index.php/topic,147787.0.html