Author Topic: Look, squirrel! Or, how bike projects shift quickly; new CB750 K6 project for me  (Read 5339 times)

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Offline PeWe

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This one.


It has high dose of phosporous and zinc.

Forum member ofreen has feeded his CB750F with it during many years.
I think soon closer to 200.000  than 150.000 miles.

My K2 has got it too. Gearbox felt really good.
Oil felt durable after 5000 km, still not that thinned.

EDIT:
I bought a bottle of ZZDP additive for cars. Saw too late it had anti friction stuff in it.  Drained the oil direct.
Old car engines like both. CB750 clutch not.
« Last Edit: May 19, 2024, 07:00:06 AM 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 grcamna2

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This one.


It has high dose of phosporous and zinc.

Forum member ofreen has feeded his CB750F with it during many years.
I think soon closer to 200.000  than 150.000 miles.

My K2 has got it too. Gearbox felt really good.
Oil felt durable after 5000 km, still not that thinned.

EDIT:
I bought a bottle of ZZDP additive for cars. Saw too late it had anti friction stuff in it.  Drained the oil direct.
Old car engines like both. CB750 clutch not.

I had used Spectro 'mineral' for many years(in the white bottle)in other folks bikes and my own and really like how it performed;I still have 2 qts. of their 5 & 10wt. standard fork oil which I mix from.
I don't see Spectro available as much when I look for it in discount locations.  How much do they charge for it per quart ?
Do they still make it in Brookfield,Connecticut,USA,or another country ?
Does their standard mineral motor oil give consistent shifting and clutch action over it's usable lifespan Per? if so,I imagine(knowing their good business)they may have improved it;I always enjoyed the performance of it,in the past.
« Last Edit: May 20, 2024, 03:16:11 PM by grcamna2 »
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline willbird

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This one.


It has high dose of phosporous and zinc.

Forum member ofreen has feeded his CB750F with it during many years.
I think soon closer to 200.000  than 150.000 miles.

My K2 has got it too. Gearbox felt really good.
Oil felt durable after 5000 km, still not that thinned.

EDIT:
I bought a bottle of ZZDP additive for cars. Saw too late it had anti friction stuff in it.  Drained the oil direct.
Old car engines like both. CB750 clutch not.

Recently learned that there is a balance between ZDDP and the detergent package. They are like a teeter totter working against each other. And if an additive reduces friction oddly wear goes UP, and the reverse is also true. Sticking to as product though and not mixing in other stuff is probably a good start. Lab work on the oil also showed a carryover of the additive package from the prior oil being used for at least the first oil change. This again supports picking an oil and sticking with it, not jump skipping all over the place with brands and types :-).

Offline PeWe

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I mix oils most of the time ;D
I use Red Line and Spectro as ZZDP additives with other oils such as Eurol Twinlube synthetic or Eurol Mineral.

I ordered a batch of Red Line 20W-60 a warm summer for a reduced price to my hot running engine. Next change 1/3 mix with 20W-50. First Red Line, later Eurol.

1 bottle of 20W-60 in each oil change of Eurol Synth. Too much 20-60 caused slipping starter, clutch was fine.

The minerals to my almost stock K2.

Semi Synth is a mix ;D
Interchangeable with other oils written on all oil bottles.
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 willbird

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I mix oils most of the time ;D
I use Red Line and Spectro as ZZDP additives with other oils such as Eurol Twinlube synthetic or Eurol Mineral.

I ordered a batch of Red Line 20W-60 a warm summer for a reduced price to my hot running engine. Next change 1/3 mix with 20W-50. First Red Line, later Eurol.

1 bottle of 20W-60 in each oil change of Eurol Synth. Too much 20-60 caused slipping starter, clutch was fine.

The minerals to my almost stock K2.

Semi Synth is a mix ;D
Interchangeable with other oils written on all oil bottles.

There is THAT way of doing things too, and to each of us our own way ;-).

Bill

Offline gearsoup

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I've been riding the bike, putting on some mileage, but it's time to turn my attention back to some of the refinishing required.
For a 1976 US model, what is the actual color scheme of the HONDA emblem on the gas tank? Gloss Black with white lettering?

Would anyone have a better photo of #3, which is what I understand the correct color scheme to be?
Current Project: CB750-K6 (hoping for OEM look)
Future Project: CB750-K8  (likely go wild on this build)

Offline PeWe

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Number 3 for K3-K6



K2 has less "background". Complete sets not available. 2 of one side only. Must bend one for other side as I did on my brown K2


#

K1 has golden "edges" of letters not shown on that incomplete picture.
« Last Edit: July 05, 2024, 10:47:50 AM 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 gearsoup

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Number 3 for K3-K6


Thanks PeWe. It looks like you refinished those at some point? I was curious if the "alligator bumps" were supposed to be entirely filled with paint so as to look smooth? What about the tip top of the letters themselves; shiny or black enamel?
Current Project: CB750-K6 (hoping for OEM look)
Future Project: CB750-K8  (likely go wild on this build)

Offline PeWe

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  • Bike almost back to the 70's 2015
Number 3 for K3-K6


Thanks PeWe. It looks like you refinished those at some point? I was curious if the "alligator bumps" were supposed to be entirely filled with paint so as to look smooth? What about the tip top of the letters themselves; shiny or black enamel?
Bought them new to the tank set 2014.
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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I've been riding the bike, putting on some mileage, but it's time to turn my attention back to some of the refinishing required.
For a 1976 US model, what is the actual color scheme of the HONDA emblem on the gas tank? Gloss Black with white lettering?

Would anyone have a better photo of #3, which is what I understand the correct color scheme to be?
My K6 with the original paint
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