Author Topic: 1972 CB750 Four K2 -- Rebuilt to NEW OLD STOCK -- PIX ON PAGE 50  (Read 241318 times)

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Offline edwardmorris

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1000 on: May 17, 2015, 07:51:27 PM »
Triple in place, forgot to take pix with the all new Chrome bolt kit from yamiya (without the spacers, I saved my old ones).

Everything that sits between the trees is NOS.

Readied the center stand hardware, all NOS except for DIY zinced C shaped bracket and pivot shaft.

Offline edwardmorris

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1001 on: May 17, 2015, 07:54:53 PM »
Lots of grunts and curses later the spring went on. Tons of regular grease on the pivot shaft.

Got the front caliper mounts ready, used Acura o-rings as Honda ones in that size were NLA, NOS ones cost $16 each :o :o Used tons of high vac grease on the pivot. Not in pic are NOS brake pad position adjuster screw, spring, washer and nut.



Offline edwardmorris

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1002 on: May 17, 2015, 07:58:29 PM »
Temp installed yamiya repop K2 correct handleabrs using clamps from the K3.

DIY Zinced brake lever pivot, spring etc. lubed up with high vac grease. and installed.

Offline edwardmorris

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1003 on: May 17, 2015, 08:00:42 PM »
DIY Zinced swingarm end caps.

NOS special bolt and hardware for the brake stay bar.

NOS hardware for the DIY zinced swingarm end caps.

By this time, I was starting to lose feeling in various parts of my body so I got lazy with pix.

Offline edwardmorris

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1004 on: May 17, 2015, 08:04:25 PM »
Took a break and decided to install the rear shocks and call it a night. All NOS hardware for the rear shocks.

Went to install them and the set back hit :( :( :( :(

I was too worried about throwing my back out (as I did when the bike was new to me) because of the ridiculously tall center stand, I had it shortened an inch. What I didn't realize until later, was that the PO had hacked a smaller 17" wheel, which is why it was such a pain to pull into the center stand. Anyway, long story short, I can't install the rear shocks without the stand snapping back >:( >:( >:( >:(

Need me a stock sized 750 center stand pronto, gotta get it powder coated quickly too.




Offline oldhatt45

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1005 on: May 18, 2015, 05:18:03 AM »
Rafi,

LOOKING GOOOOOODDDDD!!!
I think you need to change the Subject Line to ........  ASSEMBLY SPEED INCREASES

:)  :)  :)  :)

Charlie

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1006 on: May 18, 2015, 06:12:07 AM »
I think he needs to change the subject line to MINT, SHOW-ROOM RESTORATION.  :D

Rafi,
Really impressed with how great this bike looks.  She is an absolute stunner.  Definitely a BOTM candidate here.

I don't have a 750 center stand extra or I'd send it out to you and Bill's still on the road.  I know for a fact he has several because I had to move a couple of them the other day when we were pulling the 500 and 550 frames out from under Camp Camouflage.
Ron

Stella - Logan's Senior Project    78 750K http://forums.sohc4.net/index.php?topic=141761.0

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Offline edwardmorris

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1007 on: May 18, 2015, 08:52:17 AM »
Thanks Guys, May 15th was a deadline I had set but the fork issue botched that badly. So I tried to get caught up and worked till I couldn't feel my limbs last night. This center stand thing is a total blocker >:( >:( I know Bill's out for a bit, I've paged one other member I know who might be able to help and he also has a PC'ing facility, fingers crossed.

Plan was to jack it up on the center stand, install the oil tank and kick it a 100 times to confirm oil is reaching the top end, then install the valve train cover fully. Anything on the chassis after that should be fast work.

The forks, I skipped the story there but I had the damned boots/gaitors installed backwards at first, had to redo :-[ Also they're just holding the bike up for now, I'll be doing a full alignment, thanks to Jerry H and his detailed instructions 8)

I'll have to think of stuff I can get done while I wait, I really want it on the road within the next 10 days if possible.

Offline oldhatt45

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1008 on: May 18, 2015, 10:43:56 AM »
Rafi,

Don't get careless at this point.  You've done a great job, so another few days in the grand scheme of things isn't going to matter.

Just curious about the "full alignment".  Have you got something written up on that, I don't remember seeing a post about it.

Thanks

Charlie

Offline edwardmorris

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1009 on: May 18, 2015, 11:02:25 AM »
I know, but there's a reason behind the rush, I'll be taking a one month break from everything comin up fast, I'd rather have a rider before then. For the fork stuff, I don't know the source but Jerry shared this with me, hope he doesn't mind me sharing.







Tech Tip: Front Fork Alignment

Big forking deal
Posted Sep 10th, 2010 at 3:35pm

Front fork alignment is one of those crucial adjustments that are too-often overlooked. Most telescopic forks are a bit on the flimsy side, and this is particularly true of the traditional female-slider style of fork found on most cruisers. Very often, these can be twisted out of alignment either by improper installation or after they've suffered an impact that imparts a twisting motion. Consider what happens when a heavy cruiser is dropped squarely on the handlebar, and you'll have a good idea of what I mean. Fortunately, checking and aligning them takes only a few minutes.

Start by jacking the bike up so the front wheel is off the ground; a half-inch or so will do it.

If the forks have been removed from the bike:

**1 **Set the fork height in the upper clamp, and then tighten the pinch bolts in stages to the proper torque. If you're not convinced that the heights are equal, slip the axle into place. If it doesn't glide smoothly through the forks, one leg is higher than the other, so readjust them until the axle slides through them with little or no effort.

2 Install the front fender-but don't tighten the bolts.

3 Install the front wheel and axle. If the axle threads into the fork, thread it in loosely; if it uses a nut, just snug the nut down by hand. Do not tighten the axle pinch bolts.

4 Spin the wheel as vigorously as you can and abruptly clamp on the brake. Holding the brake lever on, tighten the front axle

**5 **Lower the bike onto the ground, and, while holding the front brake, gently pump the forks a few times. You did remember to tighten those upper pinch bolts didn't you?

6 Tighten the lower clamp's pinch bolts, followed by the axle pinch bolts.

7 Tighten the fender bolts.

That's it bub, the forks are now aligned, but wait: there's more.

If you suspect the forks are tweaked but don't want to go through the whole shebang, there's a short cut.

Support the weight of the bike on the jack or center stand, and loosen the front axle. Remove the lock nut, and then try to slide the axle out of the fork. If it comes away with little effort, the forks are in alignment. If the axle has to be pounded out, it's a safe bet the forks are slightly tweaked. Of course that presumes the axle hasn't been rusted into place.

To correct a slight misalignment, loosen everything but the top clamp pinch bolts (you don't have to remove anything), and start at Step #3. Anytime the wheel is removed, perform steps #4 and #5: that'll center the wheel in the fork and provide better suspension and braking action.

Offline oldhatt45

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1010 on: May 18, 2015, 11:58:51 AM »
Rafi,

Thanks for the Info.  I read something like this a while back on the forum. 
I'm sure Jerry won't mind. 
After all isn't information sharing what the forum is all about.  :)

I understand about wanting the bike up and running before your time off, but don't worry you'll get there.

Charlie

Offline jerry h

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1011 on: May 18, 2015, 09:02:37 PM »
No problem Rafi..... I got it off the internet, so no secret info here.  I know it really helped my front end though.   Go slow....  takes time to massage everything into alignment, but well worth it.    You should re think having a deadline.  Gremlins are attracted to that word.  >:(

As others have said,  really beautiful work so far! ;)
"It is not the critic who counts, the credit belongs to the man who is actually in the arena, whose hands are covered with grease and oil."

K2 http://forums.sohc4.net/index.php/topic,105097.0.html

Offline edwardmorris

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1012 on: May 18, 2015, 09:55:02 PM »
Jerry! ;D

Thanks for the kind words. For the record, if I haven't already mentioned it, Jerry's Flawless K2 is what inspired most of my build 8)

The deadline, yea, I'm going to relax it a bit, a holiday weekend is coming up so hopefully I'll be able to get things moving gradually enough to not screw up. Bill will be back soon, will call my PC guy to see if he can rush coat just the stands for me. The idea was to have it running, then have about a month before I can't do much except for riding for a month (people who know me may know what I'm talking about here ;)) just in case there is an issue I need to address.

Had a little time today so went ahead an installed the kickstand which I had elongated. The longer length isn't much of an issue, but the PO had it bent funny to make the bike lean too far. My welder straightened it out, but it feels like its not going to hit the ground at the correct angle, so will be replacing it with a stock sized one too :( For now, its just a means to keep the bike off the lift. All NOS hardware of course.

Scored me one of the rarest items, the early K2 dash label in near new condition (yes, its still black!) from Sean a while back 8) 8) I have yet to see a repro for this particular wording which only a handful of the earliest K2s had "Flash Oil Neut Beam". Zinced up the retaining clip, cleaned up the rubbers, gorilla glued it all back as neatly as I could. Will install it once my zinc anti seize arrives.

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1013 on: May 19, 2015, 01:58:43 AM »
Rafi,
Did you purchase a kit to do the zinc plating?  If so, what kit do you use?

Ron
Ron

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Offline edwardmorris

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1014 on: May 19, 2015, 08:57:03 AM »
Rafi,
Did you purchase a kit to do the zinc plating?  If so, what kit do you use?

Ron
No kit, all from scratch except for the clear/blue chromate. I wrote it up a while back when a lot of members were asking about it

http://forums.sohc4.net/index.php/topic,126735.msg1565802.html#msg1565802

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1015 on: May 19, 2015, 09:13:35 AM »
Excellent.  Thank you!
Ron

Stella - Logan's Senior Project    78 750K http://forums.sohc4.net/index.php?topic=141761.0

Logan's Reward - CB500 and CB550 Cafes    http://forums.sohc4.net/index.php/topic,147787.0.html

Offline evanphi

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1016 on: May 19, 2015, 11:32:00 AM »
Eagerly awaiting the finished product!
--Evan

1975 CB750K "Rhonda"
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She's a mix-matched (former) basket case, but she's mine.

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Calculating the correct input circumference for digital speedometers connected to the original speedometer drive

Offline edwardmorris

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1017 on: May 19, 2015, 04:47:54 PM »
Me too!

Question: Is there a trick to installing the fork gaiters? I got the lower end to snapnin place but can't figure out how to snap on ghe top end with that little chrome collar in the way... :-[

Offline oldhatt45

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1018 on: May 19, 2015, 06:19:52 PM »
Rafi,

In case you haven't gotten the gaiter back on the top, you kind of have to suspend the laws of gravity in the area of the front end for about 5 minutes.  :)  :)  :)

No, really, just hold the chrome collar up and oriented correctly (such that the cut out is facing inward) and take a small pick and just go around the tube.  Should be up in no time at all.  That chrome collar (at least on my forks) just kind of floats but is pinned by the gaiter.

Also, in post #97 in my build thread (Page 4 toward bottom) I put in a little lip type washer inside the fork ear to hopefully keep the fork tube from rubbing or flexing against the inside of the fork ear. 

Hope this helps,

Charlie

Offline edwardmorris

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1019 on: May 20, 2015, 12:19:28 AM »
Rafi,

In case you haven't gotten the gaiter back on the top, you kind of have to suspend the laws of gravity in the area of the front end for about 5 minutes.  :)  :)  :)

No, really, just hold the chrome collar up and oriented correctly (such that the cut out is facing inward) and take a small pick and just go around the tube.  Should be up in no time at all.  That chrome collar (at least on my forks) just kind of floats but is pinned by the gaiter.

Also, in post #97 in my build thread (Page 4 toward bottom) I put in a little lip type washer inside the fork ear to hopefully keep the fork tube from rubbing or flexing against the inside of the fork ear. 

Hope this helps,

Charlie
OK, I'll give it a try, thanks. For the washer, I think part number 51622-292-010 Fork Rubber does the same thing, centers the tube inside the fork ear. I used NOS ones, so I think I'm covered there...

Offline edwardmorris

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1020 on: May 20, 2015, 10:17:22 PM »
How does this look? I'm still not convinced they're on all the way :(

Installed all reconditioned rubbers on the battery box. The Scorpion AGM has arrived, with not a shred of documentation. Is it ready to go or should I leave it on the tender?

Offline edwardmorris

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1021 on: May 20, 2015, 10:20:49 PM »
All new hardware for the engine mounting tabs, installed for now, need torquing down.

Question about the seat latch bracket: Does the frame ground terminal from the harness go between this bracket and the frame?

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1022 on: May 20, 2015, 10:21:46 PM »
The battery should be ready to go.
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Offline Restoration Fan

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1023 on: May 21, 2015, 02:31:51 AM »
Rafi,
My Scorpion sat there for about 2 months before we were ready to put it into the bike.  It arrived ready to go and held its charge just fine for the whole time but I did put it on a tender for the afternoon one day during that time.  I don't think it needed it but I did it just to make sure.
Ron

Stella - Logan's Senior Project    78 750K http://forums.sohc4.net/index.php?topic=141761.0

Logan's Reward - CB500 and CB550 Cafes    http://forums.sohc4.net/index.php/topic,147787.0.html

Offline calj737

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Re: 1972 CB750 Four K2 -- Project "Ice Cream"-- SLOW ASSEMBLY
« Reply #1024 on: May 21, 2015, 03:40:38 AM »
A multimeter tells the truth...
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