Author Topic: 1978 CB750K — Post 836 OIL PRESSURE - not good  (Read 248188 times)

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Offline SKTP

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Re: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #900 on: January 21, 2016, 05:02:13 PM »
The female Alternator rubber "sheaths" are rock hard...I had to burn them with a lighter to get them to soften up for a second, then they returned to their previous rock hard state...I have used that crimper before...will have to acquired one again. Thanks everyone.
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
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Offline Restoration Fan

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Re: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #901 on: January 21, 2016, 05:41:22 PM »
Sometimes also you can scratch the dirty color back a little.  If you have a steady hand you can shave off a poofteenth with a razor blade to find the color

Sent from my SM-G920I using Tapatalk
TIL an awesome new word!  Poofteenth is now my favorite measurement!
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

Offline 754

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Re: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #902 on: January 21, 2016, 07:28:22 PM »
That is even better than RCH.. Specially when women ask what it means..
 Then they shake their heads, and say how thick is a Coyote hair  8)..and how do you know this .?  ?
Maker of the WELDLESS 750 Frame Kit
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Lost quite a few CB 750's along the way

Offline timbo750

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Re: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #903 on: January 21, 2016, 07:57:04 PM »
A poofteenth is actually an official measurement is Australia, its 3/8 of a hair on a bees dick.

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Offline SKTP

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Re: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #904 on: February 14, 2016, 05:34:26 PM »
So the bike is coming together. I put the carbs on today....but after getting the push and pull cables on...it's not snapping back very well at all....and not like last time when it was the cable....it seems like the actual bar that turns and opens and closes is really grabby and stiff....is this common for carbs that have been sitting for 2 years in a plastic box? I figure I'll take them apart and clean them....last time I just slapped them on and they worked fine
« Last Edit: February 15, 2016, 09:31:30 AM by SKTP »
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
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Offline SKTP

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Re: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #905 on: February 15, 2016, 08:24:05 AM »
Do you guys have any opinions on sending carbs out for cleaning versus doing it yourself? This would be my first carb rebuild. I do not have an ultrasonic cleaner.
« Last Edit: February 15, 2016, 08:42:09 AM by SKTP »
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
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Offline madmtnmotors

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Re: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #906 on: February 15, 2016, 09:27:40 AM »
Do you guys have any opinions on sending carbs out for cleaning versus doing it yourself? This would be my first carb rebuild. I do not have an ultrasonic cleaner.

Carbs suck. I hate messing with carbs. There's a couple of tricks to getting the PD carbs back together correctly. I've documented the choke linkage here:

http://forums.sohc4.net/index.php/topic,100352.msg1669248.html#msg1669248

Member Harisuluv is the local guru and has very good reviews. If you send them out, send them to him.
TAMTF...


Wilbur



Projects:
"Evolution": http://forums.sohc4.net/index.php?topic=100352.0
"P.O. Debacle": http://forums.sohc4.net/index.php/topic,126692.msg1441661.html#msg1441661
F2/F3 O-rings: http://forums.sohc4.net/index.php?topic=113672.msg1300721#msg1300721
Cam Tower Studs: https://www.mcmaster.com/#93210a017/=t19sgp
Clean up that nasty harness: http://forums.sohc4.net/index.php?topic=137351.msg1549191#msg1549191
http://forums.sohc4.net/index.php/topic,148188.msg1688494.html#msg1688494
http://forums.sohc4.net/index.php/topic,139544.msg1579364.html#msg1579364
                                          
Charging system diagnosis: http://forums.sohc4.net/index.php?topic=1012.msg8345#msg8345
Get the manuals: http://manuals.sohc4.net/cb750k/
The Dragon: http://forums.sohc4.net/index.php?topic=45183.msg1571675#msg1571675
Headlight Switch: http://forums.sohc4.net/index.php?topic=113986.msg1283236#msg1283236
Branden's leak free top end thread: http://forums.sohc4.net/index.php?topic=107040.0
Engine Lifting Made Easy: http://forums.sohc4.net/index.php/topic,58210.msg1684742.html#msg1684742
                                      http://forums.sohc4.net/index.php/topic,100352.msg1675840.html#msg1675840
Static and Dynamic Timing: http://www.hondachopper.com/garage/carb_info/timing/timing1.html
Airbox Gasket Replacement: http://forums.sohc4.net/index.php/topic,114485.msg1290000.html#msg1290000
"Café" : http://forums.sohc4.net/index.php/topic,84697.msg953814.html#msg953814
PD Carb Choke Linkage: http://forums.sohc4.net/index.php/topic,100352.msg1669248.html#msg1669248
                                    http://forums.sohc4.net/index.php/topic,110931.msg1248354.html#msg1248354
                                    http://forums.sohc4.net/index.php/topic,48858.msg515204.html#msg515204
Follow up on your damn posts: http://forums.sohc4.net/index.php/topic,144305.msg1791605.html#msg1791605
Taiwanese Cam Chain Tensioners:  http://forums.sohc4.net/index.php/topic,155043.msg1774841.html#msg1774841
Gumtwo Seat Cover: http://forums.sohc4.net/index.php/topic,164440.msg1897366.html#msg1897366
Primary Drive: http://forums.sohc4.net/index.php/topic,166063.msg1919278.html#msg1919278
Tank Latch: http://forums.sohc4.net/index.php/topic,165975.msg1919495.html#msg1919495
Shorten your forks: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-shorten-forks-td4042465.html DO NOT CUT THE SPRINGS!
Clutch How To: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-change-and-adjust-a-clutch-SOHC-td4040391.html
Late model K7/K8/F2/F3 front sprocket cover removal: http://forums.sohc4.net/index.php/topic,178428.msg2072279.html#msg2072279
630 to 530 conversion: http://forums.sohc4.net/index.php/topic,180710.msg2094423.html#msg2094423

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Offline edwardmorris

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Re: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #907 on: February 15, 2016, 10:12:37 AM »
Do you guys have any opinions on sending carbs out for cleaning versus doing it yourself? This would be my first carb rebuild. I do not have an ultrasonic cleaner.

+1 for sending it to James.

I invested in a US cleaner because I anticipated more than one build, and I also like to clean my cam towers and a few other things ultrasonically. They can be cleaned without one using various dips and such, but I'd hate to leave a possibility of having to redo it. IMHO, for a DIY clean, US cleaner is a must.

Offline SKTP

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Re: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #908 on: February 15, 2016, 11:33:17 AM »
Email sent to james....

got these bad boys back on over the weekend...knuckles skinned...but I'm in love again

1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
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Offline SOHC4 Cafe Racer Fan

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Re: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #909 on: February 15, 2016, 11:45:46 AM »
Cool pipes, Chris.  Those clamps are interesting, too. 

So, ready to ride??
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: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #910 on: February 15, 2016, 11:52:13 AM »
I wish...I am close. I had my carbs cleaned once years ago...and 2 years ago I just put them on and they worked...this time however, they are sticking and not in the cable (last time cable routing caused some snap-back issues)...so I figure I'll send then out to get a proper cleaning...I am afraid to mess with them

The clamps were made by member 754...
« Last Edit: February 15, 2016, 12:20:07 PM by SKTP »
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
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Offline SOHC4 Cafe Racer Fan

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Re: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #911 on: February 15, 2016, 12:09:34 PM »
I wish...I am close. I had my carbs cleaned once years ago...and 2 years ago I just put them on and they worked...this time however, they are sticking and not in the cable (last time cable routing caused some snap-back issues)...so I figure I'll send then out to get a proper cleaning...I am afraid to mess with them

The clamps were made by member 745...

My CRs are due for an ultrasonic cleaning.  I just had the GL front inspected and resprung by Matt Wiley at Race Tech (for free!) but the carbs are not doing their normal job.  I'm taking them in to Jay's shop for a cleaning.  Stuck with the 550 for now.

PS My RC51 still needs a new home!
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: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #912 on: February 22, 2016, 11:19:13 AM »
Sent my carbs out....finally got all the engine covers on.

It's so much heavier than I remember

1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
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Offline SOHC4 Cafe Racer Fan

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Re: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #913 on: February 22, 2016, 01:43:28 PM »
It's so much heavier than I remember

Yep.  Every time I ride my 750 after something else, I think the same thing.
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: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #914 on: February 27, 2016, 05:56:28 PM »
2 quarts of oil are in the bike. I forget, do I just wait for it to drain into the main case (the oil tank is full currently) or do I have to pump it all through with the Kickstarter to get the remaining oil into the bike?
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
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Offline Desert-SOHC

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Re: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #915 on: February 27, 2016, 09:03:26 PM »
I like to open the valve caps and squirt oil all over the cam and lifters before a first start, I just make sure my pint holding oil can is empty before I start it.
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Re: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #916 on: February 27, 2016, 09:11:49 PM »
Get that sucka started, Chris, so we can go riding in LB!
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: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #917 on: February 27, 2016, 10:01:13 PM »
My carbs are still out being cleaned and rebuilt....got the rear wiring finished today and got the rear brake linkage on....getting closer
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
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Offline Bootsey

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Re: The build slowly contines — 1978 CB750K - Assembly time - engine in frame
« Reply #918 on: February 27, 2016, 10:16:35 PM »
Man, those headers & clamps are all kinds of awesome.

Offline SKTP

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It runs
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 RAFster122s

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Congrats, yeah oil on top end is best...the oil tank shouldn't drain down to the sump or you have issues that need addressed.
David- back in the desert SW!

Offline MCRider

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It runs

As you know I was one of the first owners of a set of Triple A pipes like yours. (see my avatar, ca 1971). How does it sound?

Ditto on the clamps!  ;D

BTW: #3 makes a nice case guard, don't ask me how I know.  ;)
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 SKTP

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This is the it running for the very first time this rebuild.

Strangely, it was had to start a few hours later...but it did start

I put it through all the gears while on the center stand.

Things to do: Button up the bird's nest, front brakes, front fender, speed/tach cables, new tires would be a good idea...

MCRider...I don't understand what/who #3 is?

http://iconosquare.com/p/1205374959198561631_464507968#sthash.OdInPcra.dpuf
« Last Edit: March 14, 2016, 10:16:40 AM by SKTP »
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
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Offline BPellerine

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Re: The build slowly contines — 1978 CB750K - Running VIDEO link added
« Reply #923 on: March 14, 2016, 10:35:24 AM »
sounds good!think mc rider meant no 3 pipe.billp
1978 CB 750K ard and webers
another anfob

Offline SKTP

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Re: The build slowly contines — 1978 CB750K - Running VIDEO link added
« Reply #924 on: March 14, 2016, 10:46:21 AM »
Ah that makes sense....I'm a little slow this morning...day light savings and all

So #4 should be rider's right? I have the #4 plug wire rider's left
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