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Author Topic: 1978 CB750K — Post 836 OIL PRESSURE - Hopefully Good!?  (Read 251776 times)

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Offline SOHC4 Cafe Racer Fan

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Re: 1978 CB750K — It never ends! (New ROTORS)
« Reply #1300 on: June 20, 2019, 10:14:59 PM »
Quote from: SKTP on June 20, 2019, 05:31:26 PM
I am back! My electric starter seems to have stopped working. I believe it is my Stator. Should I source and OEM one or are there good aftermarket ones? Any help appreciated as always...

You can rebuild yours OR you might consider upgrading with a 1980-83 DOHC CB900/1100F starter.
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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! (Stator)
« Reply #1301 on: June 21, 2019, 05:40:45 AM »
I’m way too tired. I meant solenoid...

My starter stopped working. I think it’s my SOLENOID.

Source an OEM ONE? Rebuild? Good aftermarket?

It was working. Now it just makes my dash lights turn off. Then if I wait a few seconds I can turn the key on and off and they come on again. It makes no sound. I can kick or push start it easily. It was working fine, but did very occasionally do this same thing, but then work again after it got running.
« Last Edit: June 21, 2019, 05:58:49 AM by SKTP »
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1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
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Offline Tintop

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Re: 1978 CB750K — It never ends! (Solenoid, I meant to say)
« Reply #1302 on: June 21, 2019, 04:31:20 PM »
I'd spring for the OEM, but there are lots of inexpensive ones on eBay.
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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! (Solenoid, I meant to say)
« Reply #1303 on: June 22, 2019, 05:55:35 PM »
OEM IS $139?!!!! Might try a rebuild first
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Offline RAFster122s

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Re: 1978 CB750K — It never ends! (Solenoid, I meant to say)
« Reply #1304 on: June 22, 2019, 06:13:27 PM »
Future reference,South Sound Honda in Olympia WA has some of if not the lowest prices on Honda parts I have found...very reasonable shipping charges as well. David
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Offline Tintop

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Re: 1978 CB750K — It never ends! (Solenoid, I meant to say)
« Reply #1305 on: June 22, 2019, 08:31:15 PM »
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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 seanbarney41

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Re: 1978 CB750K — It never ends! (Solenoid, I meant to say)
« Reply #1306 on: June 22, 2019, 11:51:13 PM »
Dude, pretty sure I got good used for $30 shipped...
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Offline SKTP

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Re: 1978 CB750K — It never ends! (Solenoid, I meant to say)
« Reply #1307 on: June 27, 2019, 08:23:51 AM »
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Offline SKTP

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Re: 1978 CB750K — It never ends! (Solenoid, I meant to say)
« Reply #1308 on: July 23, 2019, 01:25:13 PM »
Well the fun never ends. I finally had some time and went to install the new solenoid, which I thought was the issue.

SO I swapped it in and I had zero power. No dash-lights, nothing. So I put the old one back in, then...Checked the battery, it was good. Checked the power at the key switch = Good. Realized that the parking light WAS working. Cleaned all the connections in the bucket. Then I talked to an experienced mechcanic on the phone and I now believe that it is the START BUTTON....if I press the start button I can see the neutral light very faintly and sporadically flicker....So I am going to try clean and rebuild the start switch...do this characteristics make you think that it could be the switch? I just want to ride!!!!
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BIKE OF THE MONTH - OCTOBER 2017
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Offline SKTP

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Re: 1978 CB750K — It never ends! (NEW ELECTRICAL ISSUES! F**K!!!!)
« Reply #1309 on: July 27, 2019, 08:13:57 PM »
Cleaned the switch. It was filthy. It was not the issue.
« Last Edit: July 29, 2019, 11:57:37 AM by SKTP »
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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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Re: 1978 CB750K — It never ends! (NEW ELECTRICAL ISSUES! F**K!!!!)
« Reply #1310 on: July 27, 2019, 10:24:50 PM »
It being filthy would have reared its head at some point...so, it is good it is cleaned and lubed now.

Check the basics again and start testing for proper voltage at various point in your wiring where you know there should be voltage.  You are likely dealing with a short circuit somewhere in your wiring to give you the symptoms you describe.
David
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Offline SKTP

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Re: 1978 CB750K — It never ends! (NEW ELECTRICAL ISSUES! F**K!!!!)
« Reply #1311 on: August 21, 2019, 04:00:03 PM »
Is this the battery I want? Have you ordered one from here? Thanks (I want to spend less than $100)

https://www.batterystuff.com/powersports-batteries/sYTX14AHL-BS.html#WayPointInformation

OTHER OPTIONS:

https://www.batterystuff.com/batteries/motorcycle/honda/1978/750cc-cb750k-four/
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BIKE OF THE MONTH - OCTOBER 2017
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Offline RAFster122s

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Re: 1978 CB750K — It never ends! (NEW ELECTRICAL ISSUES! F**K!!!!)
« Reply #1312 on: August 21, 2019, 04:10:26 PM »
Neutral right being dim could be a sign your neutral switch is dirty and not making good contact.

Scorpion AGM batteries are good quality. Be sure your battery maintainer is AGM compatible, older models do not treat them properly.

David
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Offline SOHC4 Cafe Racer Fan

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Re: 1978 CB750K — It never ends! (NEW ELECTRICAL ISSUES! F**K!!!!)
« Reply #1313 on: August 21, 2019, 05:14:40 PM »
I've never used a Scorpion.  YUSA makes reliable AGM batteries.  If you decide to go lithium based, I would recommend Shorai.  IF you do go with a lithium-based battery, you will need a specific reg/rec that regulates charge voltage down to 14.0v (see Rick's).  Lithium batteries do not do well with voltage spikes above 14.2 V.
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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 CB_Jeff

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Re: 1978 CB750K — It never ends! (NEW ELECTRICAL ISSUES! F**K!!!!)
« Reply #1314 on: August 21, 2019, 06:09:50 PM »
I can offer that I have had good luck with the scorpion batteries. My oldest one is four years old at this point and still seems fine. For the price seems like good value.
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Offline SKTP

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Re: 1978 CB750K — It never ends! (NEW ELECTRICAL ISSUES! F**K!!!!)
« Reply #1315 on: August 21, 2019, 06:57:10 PM »
Just ordered the scorpion...thanks for the input
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BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
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2004 Honda CR-V
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Offline SKTP

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Re: 1978 CB750K — It never ends! (NEW ELECTRICAL ISSUES! F**K!!!!)
« Reply #1316 on: September 03, 2019, 11:26:28 AM »
Turns out I am just dumb and my battery was dead. I swear it read fine and the electrical got knocked out by the bump...but the new battery is in and it runs perfectly so far.
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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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2004 Honda CR-V
1966 Honda S90

Offline SOHC4 Cafe Racer Fan

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Re: 1978 CB750K — It never ends! (I am not a smart person)
« Reply #1317 on: September 03, 2019, 01:52:42 PM »

Chris,

Make sure your charging system is working up to snuff and/or keep it on a battery tender.
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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 PeWe

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Re: 1978 CB750K — It never ends! (I am not a smart person)
« Reply #1318 on: September 05, 2019, 08:24:43 AM »
About solenoids for those who need one. I found starter solenoid from China for around $5-6 US with shipping.  I had to recrimp the terminals to fit main harness. Work fine. I hope it will live longer than previous Yamiya aftermarket that costed much more and died within 3 months of use.

I ordered 3 cheap ones more just for sure. Need to crimp proper socket and pin.
« Last Edit: September 05, 2019, 08:27:11 AM by PeWe »
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CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline SKTP

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Re: 1978 CB750K — It never ends! (I am not a smart person)
« Reply #1319 on: September 06, 2019, 12:03:45 PM »
September 9th, seems like I will lose the entire beginning of this thread...I downloaded all the pictures from photo bucket, but there is no way I am paying for their terrible image hosting service...

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BIKE OF THE MONTH - OCTOBER 2017
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Offline jgger

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Re: 1978 CB750K — It never ends! (I am not a smart person)
« Reply #1320 on: September 06, 2019, 12:20:07 PM »
Upgrade-download-CANCEL!
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Offline Tintop

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Re: 1978 CB750K — It never ends! (I am not a smart person)
« Reply #1321 on: September 06, 2019, 03:38:59 PM »
Time for a class action suit!  As far as I'm concerned my build threads are literary work, and Photobucket's threatened action will constitute destruction of private property.  The fact is they lowered the limited after purchase, and then turn around and try to hose us by saying we're over their new limit.  BS
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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! (I am not a smart person)
« Reply #1322 on: September 09, 2019, 12:27:05 PM »
Sorry about the poor GoPro Aiming...I will shoot a better video soon...but I though you all might like hearing the pipe...I punch it up to 80mph (4th) after the light

As you can see, the Black bomber Speedo "re-calibration" didn't really work out so well...Maybe I should ask for my money back?


Not a valid vimeo URL
« Last Edit: January 03, 2020, 05:05:40 PM by SKTP »
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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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Re: 1978 CB750K — It never ends! (I am not a smart person)
« Reply #1323 on: September 09, 2019, 02:14:15 PM »
I think I would be asking them to do it again correctly or refund my money.  Are your cables in good shape rotating freely?

David
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Offline SKTP

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Re: 1978 CB750K — It never ends! (I am not a smart person)
« Reply #1324 on: September 09, 2019, 02:45:01 PM »
Quote from: RAF122S on September 09, 2019, 02:14:15 PM
I think I would be asking them to do it again correctly or refund my money.  Are your cables in good shape rotating freely?

David

Yes, I just called them and will be shipping it back to them to try again http://www.foreignspeedoinc.com
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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
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