Author Topic: 1972 CB750K2 (start from scratch) project. Cases back together  (Read 101577 times)

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Offline edwardmorris

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #150 on: January 15, 2015, 12:07:37 PM »
Lester wheels?? I see lester wheels! Sorry I get excited  :P
I just have a front
Save it for the next one ;)

As for your bearing thing, I do recall that's exactly how it moved with the stock bearings, free with hand but in place when I was moving the frame, so it's probably fine if you have everything torqued down on the stem...

Offline Davez134

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #151 on: January 15, 2015, 04:26:48 PM »
Ok one more progress pic from today. Done till tomorrow. Would do the front but I accidentally bought 2 rear spoke kits!! Oops. Anybody need rear spokes :)



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Offline Riceman

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #152 on: January 15, 2015, 06:28:27 PM »




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So the fat washer worked with the stock stem?
I'm getting ready to do this tomorrow.

Offline Davez134

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #153 on: January 15, 2015, 06:33:43 PM »
So the fat washer worked with the stock stem?
I'm getting ready to do this tomorrow.

Yeah fat washer worked for me. Frame is a 71, triple is from '74. My kit instructions said how to measure before installing.

Offline Davez134

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #154 on: January 17, 2015, 05:30:37 PM »
Well, I was going to install oil pump with new stopper and spring, but after looking it over from just the outside, I don't even want to put this pump back in the motor. Housing has obviously been taken apart, most screws are stripped out. One is missing between body and base, and appears not even a gasket in there. How do people think this is OK!?

Offline MRieck

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #155 on: January 17, 2015, 05:49:23 PM »
Installed all balls steering bearings, not too hard. Quick question about adjustment/tightness. I know it's hard to quantify, but (without forks installed) should the triple stay in place or easily move back and forth? Right now I can move easily with my hands but it stays in place if I move frame around. (Hope this makes sense)





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With no forks the trees should not move freely
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Offline Davez134

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #156 on: January 18, 2015, 09:09:48 AM »
Dave - just a reminder to clean the powder cost off the frame where the battery NEG cable attaches. There, and near the head stock where the HORN and LIGHT will ground. The powder coat can prevent a good, solid GROUND from occurring and you can have difficulties with the proper operation.

Frame looks very pretty in that gloss finish.

Thanks! I knew about the spot where the Battery negative goes but would have overlooked horn/light.

Offline Davez134

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #157 on: January 18, 2015, 09:12:47 AM »
Brought some stuff to work today to get done. Got bronze bushings installed in freshly powder coated swingarm. Froze bushings, heated swingarm with 500w work light, installed with some all thread. Went waaaay too easy. Now I don't know what to do with myself




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Offline Vinhead1957

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #158 on: January 20, 2015, 04:33:53 PM »
That's sexy

Offline Davez134

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #159 on: January 20, 2015, 06:59:51 PM »
Made some adjustments to all balls steering bearings/triple to close gap on fork ears after reading a recent thread in another section.

Thin washer on bottom, ground down top cap. Kept upper dust seal.
Also front spoke kit arrived...



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Offline Davez134

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #160 on: January 26, 2015, 02:44:13 PM »
Uh oh! S#!t just got real!



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Offline edwardmorris

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #161 on: January 26, 2015, 05:34:01 PM »
300s or 341s?


Offline edwardmorris

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #163 on: January 26, 2015, 05:48:10 PM »
Do the nonos have chambers or straight through? I've been considering that option too after reading around here. Many seem to love the 300s for an agressive street 836...

Offline Davez134

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #164 on: January 26, 2015, 06:02:32 PM »
I'll take the ends off and check for ya in a bit when I get back home. Heading to play some hockey right now. Quality of these seems great!

Offline goldarrow

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #165 on: January 26, 2015, 06:09:04 PM »
Those are nice! Can you also post pics of the other sides of pipes? Would like to see The chamber welding spots
Life Is Full Of Challenges - And My Backyard Is Full Of SOHC4's

CB550 K0
CB750 K0, K2, K23 JDM, K45, K5
And the little ones z50r, xr50r, st90


750k5 http://forums.sohc4.net/index.php?topic=114817.0

Offline Davez134

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #166 on: January 26, 2015, 07:23:55 PM »

Do the nonos have chambers or straight through? I've been considering that option too after reading around here. Many seem to love the 300s for an agressive street 836...
They are straight through. Tried to get it in this pic, but hard to capture.



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Offline Davez134

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #167 on: January 26, 2015, 07:28:17 PM »

Those are nice! Can you also post pics of the other sides of pipes? Would like to see The chamber welding spots
Not sure if these are what you wanted. If not let me know





Have drain holes in bottom as well



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Offline edwardmorris

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #168 on: January 26, 2015, 07:57:42 PM »
Thanks! So these ARE the 300 styled with removable baffles, very nice!

Offline Bill/BentON Racing

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #169 on: January 28, 2015, 06:24:44 AM »
Only if they come with that gorgeous wheel attached?  ;)
Dave, real nice! Cal I got one like that for sale ......for the rt price! D.I.D. 250x18 Buchanan's spokes SS H/D Gold anodized, Bill
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Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
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1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
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See our latest build 'Captain Marvel' CLICK HERE

Offline Davez134

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #170 on: January 29, 2015, 01:42:42 PM »
Got my replacement oil pump rebuilt. New oil stopper seal/spring, new shaft seal, new case o-rings, new gasket. Clearances checked .16mm between rotors and nearly same between rotor/body. So I can rest easy now. This is what rotors looked like in my pump that i replaced. No wonder it didn't feel smooth

Now all good to go...



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« Last Edit: January 29, 2015, 01:44:44 PM by Davez134 »

Offline Davez134

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #171 on: February 04, 2015, 05:03:45 PM »
No real big updates, just waiting for a couple brackets, front brake caliper to show up so I can get powder coated then start assembly.

I needed some exhaust spigots, and found these made out of stainless steel. Cheaper than original replacements and no rust worries



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Offline timbo750

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #172 on: February 05, 2015, 12:19:36 AM »
Dave where did you get them. They look great, are there any more available?

Offline bert96

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #173 on: February 05, 2015, 02:02:11 AM »
Would like to know too.

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Offline Davez134

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Re: 1972 CB750K2 (start from scratch) project. Small leak!!! Damn!
« Reply #174 on: February 05, 2015, 07:30:12 AM »
Dave where did you get them. They look great, are there any more available?

I got them from a seller on ebay. Contacted him before buying, said he was going to try and gauge interest and make more if there was a need. They look great, but unfortunately the dimensions are just a bit off. The length from the bottom of flange to end of spigot that presses against gasket is about 2.5-3mm too short, so it will for sure have an exhaust leak. Also the diameter where pipe slides on is just a bit off as well. I contacted him about this and waiting for a reply back. We'll see what happens.