Author Topic: Ever wonder how much oil the CB 750 cam gets ?  (Read 2645 times)

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Offline 754

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Ever wonder how much oil the CB 750 cam gets ?
« on: March 07, 2020, 04:57:16 PM »
 I have never ever seen this before in 48 years of being around  750,s .
 A guy on Instagram posted a pic of a running 750 with no valve cover on it, and he keeps it running, despite no pipes..
 For those on the Gram, look at this page tommy.sunu     .
 In the video it is spurting up about 4 inches, and he runs it long enough to get about 1/2 quart of oil all over the table..
« Last Edit: March 07, 2020, 10:58:13 PM by 754 »
Maker of the WELDLESS 750 Frame Kit
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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 HondaMan

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Re: Ever wonder how much oil they CB 750 cam gets ?
« Reply #1 on: March 07, 2020, 07:10:11 PM »
That explains why the inside top of the valve covers are always so clean! Scrubbing bubbles...
See SOHC4shop.com for info about the gadgets I make for these bikes.

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Blood is thicker than water, but motor oil is thicker yet...so, don't mess with my SOHC4, or I might have to hurt you.
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Link to Hondaman Ignition: http://forums.sohc4.net/index.php?topic=67543.0

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Link to website: https://sohc4shop.com/  (Note: no longer at www.SOHC4shop.com, moved off WWW. in 2024).

Offline 754

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Re: Ever wonder how much oil they CB 750 cam gets ?
« Reply #2 on: March 07, 2020, 07:35:17 PM »
Could you imagine how much oil would come up without the restrictors, it would hit the ceiling. And starve the mains.
 A lot of oil out those 2 tiny holes from that small pump..
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 seanbarney41

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Re: Ever wonder how much oil they CB 750 cam gets ?
« Reply #3 on: March 07, 2020, 07:59:45 PM »
Wow, pretty amazing!  Several veritable fountains of oil!
If it works good, it looks good...

Offline 754

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #4 on: March 12, 2020, 04:44:29 PM »
Bumping this up ,as there is some discussion of the top oiling system..
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 ekpent

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #5 on: March 14, 2020, 07:36:54 AM »
Wish I could see the video somehow. See he is running later 1980's carbs also.

Offline kmb69

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #6 on: March 14, 2020, 02:05:00 PM »
Frank, I can not find the video. Do you have a direct link?

Offline fxef79

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Offline 754

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #8 on: March 14, 2020, 09:37:03 PM »
Thanks FXEF..
 One thing I just noticed..
 I saw right off the carbs, but today I notice it looks like he made his own manifolds.. maybe welded steel ? Who knows.. and then I thought well you could if you got all 4 spigots out without ruining the thread......  And then I saw a thick bead of silicone on  #2 and I thought he maybe just hammered them in and sealed it.
 I don't think I would want to buy a bike from him..
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 scottly

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #9 on: March 14, 2020, 10:49:31 PM »
I suspect that's what happens when you leave the oil restrictors out; that's a lot of oil being flung off the rockers. ;) ;)
Forty years ago, back when I got my bike, I let a buddy do some work on his car in the barn, including setting the hydraulic lifters on a 302 Ford. The oil splash was much less than that, but after dousing the hot headers, suddenly burst into flame with a WHOOMP! :o :o We got it out with no damage, but it was an eye opener; neither one of us had considered the flammability of hot oil.   
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Offline PeWe

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #10 on: March 15, 2020, 01:40:05 AM »
Oil specs have flame point specified.
I usually think higher is better without any deep professional knowledge nor tests ;)
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 01Thomas

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #11 on: March 15, 2020, 05:24:02 AM »
As an Oil Professional:
The oils' Flash Point Temperature is the temperature at which oil vapors over the liquid (from evaporation) will ignite upon exposure to an ignition source.  A decent synthetic engine oil, say a 0W-30, should have a Flash Point of over 220°C. A decent mineral oil could have a Flash Point of around 200°C.

cheers
Thomas

Oil specs have flame point specified.
I usually think higher is better without any deep professional knowledge nor tests ;)
1971 Honda CB750 Four K1 [Engine: CB750E-1113521 / Frame: CB750-1113838]
1977 Seeley Honda CB750F (F1) [Engine: CB750E-2551214 / Frame No: SH7-655F]

'96 Yamaha YZF750SP & '81 Moto Guzzi SP1000 & '80 Moto Guzzi 850 LeMans II & '82 Bimota KB-3 [Frame No 49] & '66 Ducati 50 SL/1 & '53 Miele K-50 & '38 Miele 98

Offline 754

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #12 on: March 15, 2020, 08:34:28 AM »
 In light of what Scottly said.... and the way this guy treats his  motor, I am wondering if the restrictors are maybe left out...
What do you guys think ? I NEVER SEEN ONE RUN WITH COVER OFF. and it seems like a fair amount of oil.
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 Terry in Australia

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #13 on: March 15, 2020, 04:25:08 PM »
Looks a bit suspect, for sure. Now I want Franky to make me a clear plastic cam cover so I can check it on an "un-fcuked with" CB750 engine! ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline 754

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #14 on: March 15, 2020, 06:37:41 PM »
 So anyone with a test stand we need the test , won't hurt anything, a bit messy .. only has to run 20 seconds. If oil is considerably less , then he left out the jets, maybe blewcthem out and does not know.
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 Terry in Australia

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #15 on: March 15, 2020, 07:09:42 PM »
I ran my Suzuki GS 1000 engine with the cam cover off many years ago, and I remember a mist of oil, but they were a low pressure (roller bearing crank) system. ;D 
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline scottly

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #16 on: March 15, 2020, 07:15:48 PM »
Looks a bit suspect, for sure. Now I want Franky to make me a clear plastic cam cover so I can check it on an "un-fcuked with" CB750 engine! ;D
Just yank the cover of one of your CBs; you've installed your el cheapo frame kit, so the most you have to loose is a gasket. ;D
Don't fix it if it ain't broke!
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Offline Terry in Australia

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #17 on: March 15, 2020, 07:34:44 PM »
Looks a bit suspect, for sure. Now I want Franky to make me a clear plastic cam cover so I can check it on an "un-fcuked with" CB750 engine! ;D
Just yank the cover of one of your CBs; you've installed your el cheapo frame kit, so the most you have to loose is a gasket. ;D

Actually I've refined the design now Scott, so it's not just a decorative hose clamp like some snake oil salesmen are flogging to the masses, but regardless, I'm too frightened to start my K2 bitsa in case it tries to select two gears at once (or whatever happened last time, when the rear wheel locked up) and I've been too busy with Kawasaki's to get back to it, to check.

I imagine you can remove the cam cover on your Seeley without pulling the engine? ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline scottly

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #18 on: March 15, 2020, 07:51:59 PM »
Yeah Terry, I can remove the cam cover on the Seeley, but I have no reason to prove the builder in the video left out the jets by taking something apart that isn't broke.  ;)
BTW, the Frankenscott clamps are much more rigid than a "decorative hose clamp". :P :P :P
Don't fix it if it ain't broke!
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Offline Terry in Australia

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #19 on: March 15, 2020, 07:58:13 PM »
Ha ha, well you won't take yours off, and I'm too scared to start mine, what about Frank? He could whip those clamps offa his bike and take a vid? ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline scottly

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #20 on: March 15, 2020, 08:07:11 PM »
It's really pointless Terry. It's clear to me the fuk-witt left the restrictor jets out.  ::)
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline 754

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #21 on: March 15, 2020, 08:28:36 PM »
I dont have a kit in my bike , but riding with a cut frame. .. btw the frame kits are proven technology, used in a lot of triple trees, and International truck, heavy high way tractors ... to connect the steering wheel to the steering box. So millions in use out there. Do you not trust your triple trees ?

 Now I got to ask you, put a single tube  and clamp in yours, torque to whatever you torque it to, then  pull the end of the tube sideways at a known length.. like say 8 inches.  Now pull it till it moves, then 90 degrees the other way.
 You can sort of record the force with a spring scale.
 I will tell you this.. mine will not move easier..  this I already know.
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 754

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #22 on: March 15, 2020, 08:33:17 PM »
 A clear cover won't do it, you have to see if it spurts higher or lower.
 When I saw it I thought, wow that's how much comes out.. then Scott brought up a good point. And looking at what the guy did to carb manifolds, and running it that long with no pipes... nothing will surprise me..
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 seanbarney41

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #23 on: March 16, 2020, 01:34:21 AM »
Ok guys, I just went and asked the guy on instagram.  His English is not perfect, but he answered me back when I first commented on his video.
If it works good, it looks good...

Offline Terry in Australia

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #24 on: March 16, 2020, 02:33:06 AM »
I dont have a kit in my bike , but riding with a cut frame. .. btw the frame kits are proven technology, used in a lot of triple trees, and International truck, heavy high way tractors ... to connect the steering wheel to the steering box. So millions in use out there. Do you not trust your triple trees ?

 Now I got to ask you, put a single tube  and clamp in yours, torque to whatever you torque it to, then  pull the end of the tube sideways at a known length.. like say 8 inches.  Now pull it till it moves, then 90 degrees the other way.
 You can sort of record the force with a spring scale.
 I will tell you this.. mine will not move easier..  this I already know.

Thanks Frank, you must havec missed the bit where I've completely redesigned mine (don't worry, I won't be selling them, they're too complex and time consuming to make for others,  and anyway, I don' t need the money)

My new ones are all alloy, with threaded "slugs" that fit tightly inside the frame tubes, with tight fitting alloy sleeves on the outside, with screws going from the alloy outer sleeve, through the actual frame rail and
threaded into the solid core within the rail, not just clamping it on the outside, like a big hose clamp.

The good thing is, once again, if a new owner wants to take it back to stock it's easy to disassemble and weld back together, but as it is, it would be the most rigid frame kit, currently available. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline 754

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #25 on: March 16, 2020, 04:53:32 AM »
Well, then show us a pic, let's see it. If it has a bushing that slides over, but is not slit, then it's not going to be tight in 2 directions. If it has a bolt  to tension it , there us a step you have to take be the bolt head to maintain torque, and many kits miss that
You keep talking about a hose clamp, but the sleeves I made are over 2 inches wide.
 BtW. A lot of dragster held the front of the motors to the frame rails with a single hoseclamp on each side.
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 fxef79

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Re: Ever wonder how much oil the CB 750 cam gets ?
« Reply #26 on: March 16, 2020, 06:22:08 AM »
Ok guys, I just went and asked the guy on instagram.  His English is not perfect, but he answered me back when I first commented on his video.

Inquiring minds want to know... what did he say?