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Author Topic: Do I need to replace the pucks?  (Read 2287 times)

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Offline MauiK3

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Re: Do I need to replace the pucks?
« Reply #25 on: December 07, 2022, 06:58:37 AM »
That's a lot of miles!!!
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1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline PeWe

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Re: Do I need to replace the pucks?
« Reply #26 on: December 07, 2022, 09:06:13 AM »
Quote from: ofreen on December 07, 2022, 12:03:07 AM
Quote from: BenelliSEI on December 06, 2022, 03:34:54 PM
When I “retorque” anything, I don’t break it loose. Just pull to spec. If it doesn’t move, it’s tight.

Or it's stuck.  I had the engine out of my '75 750F twice over the years.  The first time the base gasket was weeping.  Re-torquing the nuts and bolts using the method I described solved that.  Still no weeping there at over 167,000 miles.
That bike has done plenty of miles

Take much oil?
Spectro HD mineral all the time?
If yes a good example of what to use in these bikes
« Last Edit: December 07, 2022, 09:08:01 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 ofreen

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Re: Do I need to replace the pucks?
« Reply #27 on: December 07, 2022, 05:15:08 PM »
Quote from: MauiK3 on December 07, 2022, 06:58:37 AM
That's a lot of miles!!!
Quote from: PeWe on December 07, 2022, 09:06:13 AM
That bike has done plenty of miles
Take much oil?
Spectro HD mineral all the time?
If yes a good example of what to use in these bikes

A lot of the maintenance history of the bike is in these two threads for anyone interested in what the possibilities are.  And yes, I've used Spectro HD 20w50 in it since I switched over from Honda HP4 back in 1998 according to my records -

http://forums.sohc4.net/index.php/topic,23731.0.html
http://forums.sohc4.net/index.php/topic,6895.0.html
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Greg
'75 CB750F

"I would rather have questions I cannot answer than answers I cannot question." - Dr. Wei-Hock Soon

Offline newday777

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Re: Do I need to replace the pucks?
« Reply #28 on: December 08, 2022, 02:07:26 AM »
Quote from: ofreen on December 07, 2022, 05:15:08 PM
Quote from: MauiK3 on December 07, 2022, 06:58:37 AM
That's a lot of miles!!!
Quote from: PeWe on December 07, 2022, 09:06:13 AM
That bike has done plenty of miles
Take much oil?
Spectro HD mineral all the time?
If yes a good example of what to use in these bikes

A lot of the maintenance history of the bike is in these two threads for anyone interested in what the possibilities are.  And yes, I've used Spectro HD 20w50 in it since I switched over from Honda HP4 back in 1998 according to my records -

http://forums.sohc4.net/index.php/topic,23731.0.html
http://forums.sohc4.net/index.php/topic,6895.0.html
Doesn't the Spectro HD have friction modifiers in it?
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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, 1 K2, 4 K6, 1 K8, 1 F1, 1 F3
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 ofreen

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Re: Do I need to replace the pucks?
« Reply #29 on: December 08, 2022, 08:27:59 AM »
Quote from: newday777 on December 08, 2022, 02:07:26 AM
Doesn't the Spectro HD have friction modifiers in it?

Clearly it is fine with wet clutches if that is what you are wondering.  It is high in ZDDP, a zinc compound friction modifier.
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Greg
'75 CB750F

"I would rather have questions I cannot answer than answers I cannot question." - Dr. Wei-Hock Soon

Offline newday777

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  • Posts: 7,176
  • Avatar is my 76 K6 in Colorado w/Cody on back 1980
Re: Do I need to replace the pucks?
« Reply #30 on: December 08, 2022, 10:22:19 AM »
Quote from: ofreen on December 08, 2022, 08:27:59 AM
Quote from: newday777 on December 08, 2022, 02:07:26 AM
Doesn't the Spectro HD have friction modifiers in it?

Clearly it is fine with wet clutches if that is what you are wondering.  It is high in ZDDP, a zinc compound friction modifier.

Yes that was my concern.
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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, 1 K2, 4 K6, 1 K8, 1 F1, 1 F3
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
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