Author Topic: 74 CB750K A Bike For My Pops  (Read 9988 times)

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Offline Stev-o

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Re: 74 CB750K A Bike For My Pops
« Reply #50 on: February 19, 2015, 10:03:45 PM »
Looking good!
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline FridgeRaider

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Re: 74 CB750K A Bike For My Pops
« Reply #51 on: February 24, 2015, 08:35:26 PM »
Looking good!

Thanks! Sad news is that I wont be getting it running before I move back to Florida like i had planned (ultimately my choice). This is why:



The mess of a stock wiring harness. The electrical parts of the bike is what I have the least experience with and it's what intimidates me most. The best I can do (and what I did) is label each corresponding connection when disassembling and upon reassembly, match the numbers. Simple enough, but doesn't really help when it comes to trouble shooting faulty connections and so forth. I had connected everything that I could, hooked up the terminals, flipped the key to on and...................nothing...... no dummy lights, no headlight, no power. There could be a dozen reasons to explain this with most likely it being that I did omit hooking up the front turn signals, back left turn signal, safety switch that runs to the clutch handle (PO broke that back in 2001), and the turn signal buzzer. With the limited knowledge I do have, I was able to chase the power to the 15 amp fuse and that was the end of it. So it came decision time, I could expend money, effort, and most importantly time trying to track down and fix the issue with the old wiring harness within my two weeks left in Tx or set in motion what my father and I had decided to do the bike anyways a month back. That was to scrap the wiring harness entirely and bring the bike into the modern day with this bad boy!

<a href="https://www.youtube.com/v/HNF-h6oBczg" target="_blank" rel="noopener noreferrer" class="bbc_link bbc_flash_disabled new_win">https://www.youtube.com/v/HNF-h6oBczg</a>

So many features! I know it isn't time period correct but my goal in this build was/is to keep the outward appearance of the bike original while upgrading the internals (CB750 purists move along! I'm not planning on taking an angle grinder to it  ;)). So the decision was made to just start buying the parts necessary to make it happen (M-unit, Rick's reg/rec combo, electrical connections from http://www.vintageconnections.com/) and ship them to Florida so they will be waiting for when I get there. Forum member Calj737 has been incredibly kind answering my preliminary questions on how to run it, even offering to draw me up a wiring diagram to fit my needs. Clearing the Army has kept me from following up on it with him this week, hopefully that will change in the next couple of days.

I did get ahead of myself with this post and would like to highlight some of the things I did before trying to turn the power on.

The carbs were cleaned, polished, and assembled (with some issues). I used a couple of different products to help clean: acetone and Berryman's chem dip, but I think the best product overall for cutting through gelled up gas was Berryman's brake cleaner in the aerosol can.







Broken slow jet was replaced with a new Keihin #40:


Parts were polished and fasteners were replaced with SS Socket Head Caps to match the rest of the bike.








When I disassembled the carbs, I was unaware the stay plate was staked in place and broke a couple of small pieces off of the inside bushing (see previous post for pics). With a little bit of grinding, I was able to grind down a jagged edge and reassemble (without the two fragments). I know that this isnt the best route to go but I don't have a spare plate to replace it with. Once reassembled there didn't seem to be any major side to side play.



1972 CB750K2 Resto-mod (836cc Upgrade) - http://forums.sohc4.net/index.php/topic,161782.0.html

Offline calj737

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Re: 74 CB750K A Bike For My Pops
« Reply #52 on: February 24, 2015, 10:37:51 PM »
Looking pretty dang good! Where to in Florida?
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline FridgeRaider

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Re: 74 CB750K A Bike For My Pops
« Reply #53 on: February 25, 2015, 03:20:08 PM »
Looking pretty dang good! Where to in Florida?

Thanks! I'm headed back to my hometown of Lakeland (45 mins east of Tampa). I have some kayak fishing/motorcycling planned for the 80+ temps there.  8)
1972 CB750K2 Resto-mod (836cc Upgrade) - http://forums.sohc4.net/index.php/topic,161782.0.html

Offline calj737

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Re: 74 CB750K A Bike For My Pops
« Reply #54 on: February 25, 2015, 03:25:57 PM »
I know Lakeland. Mom lives in New Port Richey. I'll have to stop over this Spring for some wrench turning fun!
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline FridgeRaider

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Re: 74 CB750K A Bike For My Pops
« Reply #55 on: February 28, 2015, 11:19:15 AM »
I know Lakeland. Mom lives in New Port Richey. I'll have to stop over this Spring for some wrench turning fun!

I could always use the help, saves me the trouble of researching the thousand questions I have if I can just ask you in person!

1972 CB750K2 Resto-mod (836cc Upgrade) - http://forums.sohc4.net/index.php/topic,161782.0.html

Offline FridgeRaider

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Re: 74 CB750K A Bike For My Pops
« Reply #56 on: February 28, 2015, 12:27:03 PM »
I haven't been able to do much on the bike in the past 3-4 days due to work constraints and my hatred of working in anything below 70 degrees. The garage I work in now is unheated and soon to be central Florida doesn't require a space heater for the two weeks of "winter" it has a year. Thankfully I'm not in a rush anymore to get it running before then. I do however plan on making a special trip to San Antonio because of this unused Pamco Ignition Kit for sale http://sanantonio.craigslist.org/for/4907679747.html. There is quite the debate on which ignition system for the CBs is best and I figured at that price it's worth it just to try it out. Pamco vs. Dyna vs. Stock points vs. Hondaman's ignition. The previous owner on my 78 CB750F installed a Dyna S and it hasn't given me any trouble after a year and 3000 miles.

I did forget to mention in my previous post that I purchased and installed the headlight washers that Crush makes and sells in the parts section, and they are awesome. Simple and cheap replacement for the disintegrated originals.



1972 CB750K2 Resto-mod (836cc Upgrade) - http://forums.sohc4.net/index.php/topic,161782.0.html

Offline Stev-o

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Re: 74 CB750K A Bike For My Pops
« Reply #57 on: February 28, 2015, 12:43:39 PM »
How did I miss that Pamco on my daily Craig's search??
Lucky for you....
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline FridgeRaider

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Re: 74 CB750K A Bike For My Pops
« Reply #58 on: February 28, 2015, 01:06:28 PM »
How did I miss that Pamco on my daily Craig's search??
Lucky for you....

You still have a chance to ninja it out from under me! Im not gonna make it down there until tomorrow.........just kidding, dont do that  :P
1972 CB750K2 Resto-mod (836cc Upgrade) - http://forums.sohc4.net/index.php/topic,161782.0.html

Offline Stev-o

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Re: 74 CB750K A Bike For My Pops
« Reply #59 on: February 28, 2015, 01:25:24 PM »
How did I miss that Pamco on my daily Craig's search??
Lucky for you....

You still have a chance to ninja it out from under me! Im not gonna make it down there until tomorrow.........just kidding, dont do that  :P

Nah, wouldn't do that to ya. Plus a have a Dyna on the shelf.....
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline FridgeRaider

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Re: 74 CB750K A Bike For My Pops
« Reply #60 on: March 01, 2015, 08:07:46 PM »
Despite it being in the 30-40s and drizzling all day, it still turned out pretty good. I decided to chase down an "almost to good to be true" Craigslist ad, which required a 2hr+ drive down to San Antonio. Coincidentally my buddy and I were already planning a fly fishing trip just north of S.A. anyways. My morning consisted of fishing the Guadalupe River (only hospitable habit for rainbow trout in all of TX) and not catching any of said trout.......or anything at all for that matter >:(. Good thing the afternoon made up for being cold and getting skunked all morning.  I was able to purchase a brand new unused Ultimate Pamco Ignition Kit for $100 and the guy even threw in a mud caked center stand for free! The kit just seems to be missing the spark plug wires.

To quote my father "I like it! Vintage bike, high tech parts."

1972 CB750K2 Resto-mod (836cc Upgrade) - http://forums.sohc4.net/index.php/topic,161782.0.html