Author Topic: New (returning) member just bought a K2 750  (Read 1267 times)

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Offline cyrenus

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New (returning) member just bought a K2 750
« on: December 10, 2014, 09:57:54 AM »
Hi everyone, I was a member of the old SOHC/4 site about 10 years ago when I had a ’74 CB550, but at the time I was getting into the more modern bikes and sold it.  Now that I’ve just passed the magical half-century mark in age, my interest in the classic CB750s has been renewed.  I already have a few classic Japanese bikes I acquired in the last few years, including a ’77 Yamaha RD400, a ’78 Suzuki GS750 and a ’78 Suzuki GS400.  Last year I bought a new Honda CB1100 which I love, but that bike had the interesting side effect of renewing my interest in the original CB750s.  I knew I wanted an earlier one, preferably a ’70 or ’71, but, as I’m sure you all are aware the prices of those are reaching pretty crazy levels lately.

Last week a ’72 K2 showed up in the local classifieds so I called the owner and asked some of the usual questions like what does the inside of the tank look like?  Does it run?  Does it have a title etc…The ad said Make An Offer and I know a friend of mine had already offered $1400 which was rejected.  I offered him $1675 and he countered with $1800 and we settled on $1750.  That seemed about right on the market for one of these with ‘needs,’ but still I suppose I might’ve overpaid, I’m sure you’ll all let me know if I did!  Then again, it’s the only early(ish) CB750 I’ve seen pop up locally in years, so I figured what the heck.   I kind of did a quick mental pro/con evaluation as I was looking at the bike and these were some of my thoughts:

The bike has some issues including rusty tank inside – although the exterior of tank is solid even on the bottom – and the exhaust has some small rust through spots on the bottom of some of the mufflers.  I have no problem replacing them with replicas if it comes to that.  Oh, and each of the fenders has a shallow little gouge on them, kind of a shame as they’re very nice otherwise.  The bike also has these funky lower links bolted onto the rear swingarm which lays the shocks down at more of an angle, but fortunately they appear to be totally bolt-on and easily removed.  Another drawback is the rear wheel isn’t original; it looks like one of the so-called ‘Harley’ conversions which I believe is bolted to the stock hub (correct me if I’m wrong, please).  And of course the Vetter fairing with the broken windshield, which I’ll be giving away for freebies to anyone who is able to pick it up once I remove it (rear rack too if you want it).  I believe I will have to locate a stock headlight ring, possibly headlight too and also stock turn signals if the ones on the Vetter turn out to be incorrect.  And I’m sure those items will just be the beginning of parts needed.

Despite all that, the bike did have some good positives including:  1.)  Relatively low miles at 19k.  2.)  Bike was registered and ridden up until about 2007.  3.)  It runs!  Seller had it hooked up to a fuel bottle and was able to start it for me.  It was running a little rough, possibly not firing on all cylinders, but the motor didn’t make any weird noises or rattles I could make out.  4.)  Other than the period mods bike hasn’t been hacked or messed with and is still pretty much stock.  5.)  Other than the rust inside the tank, the rest of the bike is surprisingly rust and corrosion free.  I couldn’t even find any of the engine paint that was missing or flaked off, very clean for the most part.

I’m still thinking about a restoration strategy, but I will being doing a stock-style resto with possibly some minor, year dependant variations.  In any event, I still have to go through all the mechanicals of the GS750 first, so it will be a while before the CB gets any love.  Still, I thought it would be good to introduce myself, and I still do have a couple of questions to ask.  Sorry for the lengthy introduction, sometimes I just can't shut up when I'm excited about a bike!  Here’s a photo taken by the seller as I won’t be picking the bike up until this Thursday (tomorrow).


« Last Edit: December 10, 2014, 12:32:00 PM by cyrenus »

Offline 70CB750

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Re: New (returning) member just bought a K2 750
« Reply #1 on: December 10, 2014, 10:46:13 AM »
Welcome!
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Offline Johnie

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Re: New (returning) member just bought a K2 750
« Reply #2 on: December 10, 2014, 12:10:15 PM »
Welcome back...from what I can see you did well on the price. It appears to be pretty nice exhaust. If those holes are small maybe you can get them repaired. Otherwise OEM exhaust will cost you around $1,500. But she looks like a good find for a good price. She will look a lot better once the jammer and rack is removed. Congrats on a good find for a good price.
« Last Edit: December 10, 2014, 12:12:40 PM by Johnie »
1970 CB750K0 - Candy Ruby Red
1973 CB750K3 - Candy Bacchus Olive or Sunflake Orange
1970 Chevy Chevelle SS396 - Cortez Silver
1976 GL1000 Sulphur Yellow

Oshkosh, WI  USA

Offline cyrenus

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Re: New (returning) member just bought a K2 750
« Reply #3 on: December 10, 2014, 12:31:03 PM »
Johnie, thanks for the reply.  Good to hear you don't think I paid too much.  You seem to have (or had) quite a few 750s.  I plan on doing a cost-no object restoration on the bike when the time comes so the cost of new exhaust isn't really a concern.  I haven't searched the forum yet, but was wondering if using HM300 exhaust would work, but would need jetting (or any other) changes only?  I realize the 300s aren't correct for this year, but the look will be almost exactly the same, and I want THAT SOUND.

Offline Johnie

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Re: New (returning) member just bought a K2 750
« Reply #4 on: December 10, 2014, 02:04:45 PM »
I know what you mean about the sound of the 300's. You would have to rejet, but it certainly is doable and many on the board have done it. Keep us up to date once you get at it.
1970 CB750K0 - Candy Ruby Red
1973 CB750K3 - Candy Bacchus Olive or Sunflake Orange
1970 Chevy Chevelle SS396 - Cortez Silver
1976 GL1000 Sulphur Yellow

Oshkosh, WI  USA

Offline cyrenus

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Re: New (returning) member just bought a K2 750
« Reply #5 on: December 10, 2014, 02:23:36 PM »
Good to know, thanks again for the input, Johnie.

Offline Stev-o

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Re: New (returning) member just bought a K2 750
« Reply #6 on: December 10, 2014, 07:44:34 PM »
Congrats, looks like a nice find.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline cyrenus

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Re: New (returning) member just bought a K2 750
« Reply #7 on: December 10, 2014, 07:51:13 PM »
Thanks, Steve, appreciate it.

Offline bender01

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Re: New (returning) member just bought a K2 750
« Reply #8 on: December 10, 2014, 08:47:37 PM »
Good job! Welcome!
75 550 K1
74 750 K4
1968 450 K1 Super Sport
74 750k 836 project
http://www.bikepics.com/members/bender01/
So, the strategy is to lie to people you are asking for help?

I think I'll be busy going for a ride.

Good luck!
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Offline HondaMan

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Re: New (returning) member just bought a K2 750
« Reply #9 on: December 10, 2014, 09:17:40 PM »
Wow, you've even got the OEM K2 seat! That was the best seat, ever. I wore mine out at about 85k miles, still miss it. I had the K1 seat and the K4 seat, neither compares for the 1000 mile day, IMHO.

The K2 doesn't even smooth out until about 25k-30k miles, in my experience. If you pick the right oil, good gas, line that tank with POR-15 kit, and hit the road tuned up, it will last forever. Mine (K2) rolled over 140k miles before I finally rebuilt it last year!

IMO, that was a decent price for a K2 like that one. BTW: you can still get new windshields from SlipStreamer. I just got one for my Vetter last summer. Get their "short" one, as their "tall" one is WAY too tall, I had that one last time.
See SOHC4shop@gmail.com for info about the gadgets I make for these bikes.

The demons are repulsed when a man does good. Use that.
Blood is thicker than water, but motor oil is thicker yet...so, don't mess with my SOHC4, or I might have to hurt you.
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Link to Hondaman Ignition: http://forums.sohc4.net/index.php?topic=67543.0

Link to My CB750 Book: https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=my+cb750+book

Link to website: www.SOHC4shop.com

Offline cyrenus

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Re: New (returning) member just bought a K2 750
« Reply #10 on: December 11, 2014, 06:09:21 AM »
HondaMan, that's interesting about the seat, I had no idea there would be some comfort advantage of one over another year.

That's some impressive miles you've piled onto your bike, well done; pretty hard core on an old CB!  140k miles, that makes me smile.

I'm afraid the Vetter is coming off as I won't be using this CB like you do -- I have a modern touring bike for that kind of riding, but I do admire the way you roll, for sure.  I'd love to see a photo of your K2.  Do you have a gallery with your bike(s) in it?  Would love to see it.  Oh, and BTW, your book looks like an indispensable resource for these bikes.  Thanks for the comments, I appreciate it.

Offline HondaMan

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Re: New (returning) member just bought a K2 750
« Reply #11 on: December 11, 2014, 04:34:28 PM »
HondaMan, that's interesting about the seat, I had no idea there would be some comfort advantage of one over another year.

That's some impressive miles you've piled onto your bike, well done; pretty hard core on an old CB!  140k miles, that makes me smile.

I'm afraid the Vetter is coming off as I won't be using this CB like you do -- I have a modern touring bike for that kind of riding, but I do admire the way you roll, for sure.  I'd love to see a photo of your K2.  Do you have a gallery with your bike(s) in it?  Would love to see it.  Oh, and BTW, your book looks like an indispensable resource for these bikes.  Thanks for the comments, I appreciate it.

I really should post pix of my old friend here someday. :)
I just rebuilt him this last year, and the power increase was much more than I thought would happen, given how "tight" I built everything. It will be some time before it all loosens up, and I expect even better torque then! Next I'll be working on paint, chrome-y things, polish and stuff like that: I haven't been kind to my 750, but it never has cared about that. It always gets an early oil change and chain lube, but other than that it has suffered [too] many "rode hard, put away wet" episodes over the years. I rode it year 'round from 1972 until I got married in 1979, then only in nicer weather until now. Reliable, like a hammer!
See SOHC4shop@gmail.com for info about the gadgets I make for these bikes.

The demons are repulsed when a man does good. Use that.
Blood is thicker than water, but motor oil is thicker yet...so, don't mess with my SOHC4, or I might have to hurt you.
Hondaman's creed: "Bikers are family. Treat them accordingly."

Link to Hondaman Ignition: http://forums.sohc4.net/index.php?topic=67543.0

Link to My CB750 Book: https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=my+cb750+book

Link to website: www.SOHC4shop.com

Offline cyrenus

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Re: New (returning) member just bought a K2 750
« Reply #12 on: December 12, 2014, 07:59:57 AM »
HondaMan, I always enjoy hearing these stories of long-term ownership like your own.  I look forward to seeing some photos once you've put a little lipstick and makeup on your old friend.  :)  This forum is a great resource for these bikes.  And with its more mature demographic, ahem, there's always less of the sniping and pissing contests I've seen on some other forums.

Myself and a friend made the 200 mile round trip yesterday to pick the bike up.  Will post a few photos a little later.  Happy weekend everybody!

OK, uploaded a few photos:

We removed the fairing before we put the bike on the trailer -- it was making it difficult to find a good attachment point for the straps.  Fairing lower bracket is still attached in these photos.




Got the fairing lower bracket off.  Fairly tidy under the tank:





Right side mufflers look very good with no rust or rot that I could see.



Left side mufflers, not so much.  They look okay in the photo, but are crumbling and rotting around the passenger peg mount.  In any case, I plan on going the HM300/No Number route when the time comes.  I told my friend he could have these at that time as he has a '74 CB750 in boxes he plans on turning into a rider someday.


Instruments and chrome backing holders still pretty danged presentable.  Insides of fork ears only have the slightest surface rusting, not rough at all so may be able to just polish out:



Parts of the ignition system are a little jacked up with some funky wiring, but seller did throw in two complete ignition assemblies with wiring, so hopefully something workable can be made from those.  Also some strange wiring inside headlight bucket, I suspect for the prized cigarette lighter on the fairing?  In any case I'm an electro-tard, so my electro-whiz friend on the other side of the state will have to be lured westward with free beer to lend a helping hand.

Down to her underwear:







« Last Edit: December 12, 2014, 01:02:03 PM by cyrenus »