Author Topic: CB 750 chain oiler.  (Read 1147 times)

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Offline rz350ypvs

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CB 750 chain oiler.
« on: June 18, 2022, 05:58:10 AM »
Can someone tell me if i am missing a seal here? I took it apart due to an oil leak and it doesn't look right. The only thing in thr countershaft is s gold coloured "screen".

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Offline 69cb750

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Re: CB 750 chain oiler.
« Reply #1 on: June 18, 2022, 06:28:57 AM »
You need the rubber seal on end of adjusting screw.

Offline rz350ypvs

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Re: CB 750 chain oiler.
« Reply #2 on: June 18, 2022, 08:46:17 AM »
You need the rubber seal on end of adjusting screw.
Thanks! I figured something was wrong. Does anyone have a part number? Is it available even? Thanks.

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Offline 69cb750

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Re: CB 750 chain oiler.
« Reply #3 on: June 18, 2022, 11:49:26 AM »

Offline newday777

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Re: CB 750 chain oiler.
« Reply #4 on: June 18, 2022, 07:20:48 PM »
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline scottly

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Re: CB 750 chain oiler.
« Reply #5 on: June 18, 2022, 07:25:27 PM »
https://www.ebay.com/itm/232496268850
That looks like it could be made from a short piece of vacuum hose?
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 PeWe

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Re: CB 750 chain oiler.
« Reply #6 on: June 18, 2022, 10:30:10 PM »
The oiler plug ends with a triangular shaped washer.
Both my bikes have stock still working. My K6 same since the very beginning and still working.
It has went off-on many times during the years.
It would be handy with a slim stop sealing plug with internal allen.

Never to be removed when lifting front sprocket.
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 rz350ypvs

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Re: CB 750 chain oiler.
« Reply #7 on: June 20, 2022, 04:21:31 PM »
Looks like it's not available anymore, according to two dealers here in Canada. I see i can "block" off the oiler. What are the best options? I was thinking of just buying a bolt that will cover the side hole and just using thread sealer. Anyone tried something like that?

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Offline Airborne 82nd

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Re: CB 750 chain oiler.
« Reply #8 on: June 20, 2022, 09:31:24 PM »
Looks like it's not available anymore, according to two dealers here in Canada. I see i can "block" off the oiler. What are the best options? I was thinking of just buying a bolt that will cover the side hole and just using thread sealer. Anyone tried something like that?

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There are post here where people have done just that. Then use a good chain lube. I use PJ1 Blue Label most bike shops and auto parts stores sell it. The lube stays put and works good  Orings or not even in the rain. It is clear not blue.  ??? https://pj1.com/products/
AIRBORNE82nd.

Offline scottly

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Re: CB 750 chain oiler.
« Reply #9 on: June 20, 2022, 09:52:18 PM »

It would be handy with a slim stop sealing plug with internal allen.

You mean like this?
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 PeWe

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Re: CB 750 chain oiler.
« Reply #10 on: June 21, 2022, 12:51:04 PM »
Exactly that one! ;D
The best model I have seen. Plug and forget.
No need to remove it when taking off the sprocket.

No o-ring or other seal needed?
« Last Edit: June 21, 2022, 12:58:52 PM by PeWe »
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 newday777

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Re: CB 750 chain oiler.
« Reply #11 on: June 22, 2022, 03:15:18 AM »

It would be handy with a slim stop sealing plug with internal allen.

You mean like this?

Where do you get some of these???
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline newday777

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Re: CB 750 chain oiler.
« Reply #12 on: June 22, 2022, 03:20:03 AM »
Looks like it's not available anymore, according to two dealers here in Canada. I see i can "block" off the oiler. What are the best options? I was thinking of just buying a bolt that will cover the side hole and just using thread sealer. Anyone tried something like that?

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I read a post last week on this and thread sealer on the threads will not stop the flow. You have to plug the hole in the shaft. Unfortunately I didn't save the post. 
You can Find it using the search tool above.
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline rz350ypvs

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Re: CB 750 chain oiler.
« Reply #13 on: June 22, 2022, 01:18:22 PM »
I made this steel piece and got an o-ring. Maybe it will seal.

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Offline 69cb750

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Re: CB 750 chain oiler.
« Reply #14 on: June 22, 2022, 07:03:25 PM »
What is od of spacer and O ring ?

Offline scottly

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Re: CB 750 chain oiler.
« Reply #15 on: June 22, 2022, 07:37:13 PM »

It would be handy with a slim stop sealing plug with internal allen.

You mean like this?

Where do you get some of these???
I made that six years ago, as part of my never ending quest to shed weight, as well as block the oiler. ;) 
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 rz350ypvs

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Re: CB 750 chain oiler.
« Reply #16 on: June 23, 2022, 08:24:58 AM »
What is od of spacer and O ring ?
The o-ring was about 12.4 mm which was a little big, but all i had at work. The spacer I made at 11.8mm.  I cut a 45 degree chamfer on the side that presses against the seal. I believe the bore in the countershaft is 12mm, but i didn't accurately measure it.

I went for a ride last night and left it on the side stand.  I guess i will see tonight if it leaked.

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CB400F
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Offline newday777

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Re: CB 750 chain oiler.
« Reply #17 on: June 23, 2022, 08:46:46 AM »
What is od of spacer and O ring ?
The o-ring was about 12.4 mm which was a little big, but all i had at work. The spacer I made at 11.8mm.  I cut a 45 degree chamfer on the side that presses against the seal. I believe the bore in the countershaft is 12mm, but i didn't accurately measure it.

I went for a ride last night and left it on the side stand.  I guess i will see tonight if it leaked.

Sent from my LG-M703 using Tapatalk
So you put the oring in 1st to the center bore then your milled spacer on the end of the adjuster shaft?
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline rz350ypvs

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Re: CB 750 chain oiler.
« Reply #18 on: June 23, 2022, 10:05:03 AM »
What is od of spacer and O ring ?
The o-ring was about 12.4 mm which was a little big, but all i had at work. The spacer I made at 11.8mm.  I cut a 45 degree chamfer on the side that presses against the seal. I believe the bore in the countershaft is 12mm, but i didn't accurately measure it.

I went for a ride last night and left it on the side stand.  I guess i will see tonight if it leaked.

Sent from my LG-M703 using Tapatalk
So you put the oring in 1st to the center bore then your milled spacer on the end of the adjuster shaft?
Yes, that's what i did.

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CL350
CB400F
RZ350
RD350
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Offline PeWe

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Re: CB 750 chain oiler.
« Reply #19 on: June 23, 2022, 12:05:42 PM »

I made that six years ago, as part of my never ending quest to shed weight, as well as block the oiler. ;)

Scottly, there is no rubber seal/ bottom under that plug? Sealing the oil supply via the porous metal thing and block the hole where oil comes out.
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