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Author Topic: CB750 K2 restomod to "originalish" condition // Forkbrace added ! ! !  (Read 30474 times)

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Offline Viktor.J

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Hi

I'm a dude from Sweden who had just bought me a motorcycle. I'm 24 years old and almost finished master in mechanical engineering with specialization in power plant, gasturbines etc.

The motorcycle is a CB750 K2 first time registerd 1974 but made in 1973 (between 72-75 thy only K2 shipped to Sweden). I bought it for ome weeks ago for about $ 3800 and are very pleased with the deal. In Sweden and all europe they are quite expensive for that old bike, average price for a nice CB750 is about 6000 dollars and above.

Things I've done so far:
- Changed all spark plugs
- Changed the front sprocket, rear sprocket and switched to an O-ring chain
- Oil for front fork

Things I want to change / do:
- Switching to dual front brake discs. I've already got myself extra disc, calipers, caliper arm for $ 76!
- Change to steel braided brake hoses.
- Switching to a lower handlebar, like high rise clip-ons. Do not really like the very low riding position with standard clip-ons.
- Change to the original / cooler fork ears / headlight mount
- Any change to the smaller lights. It depends on how it looks in the interaction with the other.
- Renovate and fix the seat. Current foam has dried and disintegrated.
- Sometime during the years, valve cover, front sprocket cover and generator cover been chromed. And im going to "dechrome" it and fix the aluminum finish.

That's all I know I want to do now, more will surely come :)

So all posts, comments, feedback, criticism, love and hate are welcome.
I appreciate the tips on where I can buy, how I can proceed with my wishes.

Since I have a lot in school and the Swedish motorcycle season ends in a few weeks for winter break will be a slow-moving projects, slowly but surely :)

Here are some pictures of the beast





« Last Edit: August 06, 2013, 03:30:49 pm by Viktor.J »
Please ! Take a look and give me feedback in my project thread, its much needed :)
http://forums.sohc4.net/index.php?topic=112745.0

Honda CB750 K2

Offline Terry in Australia

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #1 on: September 14, 2012, 04:38:15 am »
Where are the pics Viktor? Cheers, Terry. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

Offline Viktor.J

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #2 on: September 14, 2012, 04:39:41 am »
Hi Terry, my internett line or the website doesn't really seem to want me posting the pictures.... but i´m trying :D

B.T.W i visited the gold coast last year, one month from sydney to Cairn. Didnt have time or money to visit melbourne though !

« Last Edit: September 14, 2012, 04:51:54 am by Viktor.J »
Please ! Take a look and give me feedback in my project thread, its much needed :)
http://forums.sohc4.net/index.php?topic=112745.0

Honda CB750 K2

Offline Viktor.J

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #3 on: September 14, 2012, 04:42:28 am »
Trying smaller pictures :D


FIY i have not done the usual "I-just-bought-a-new-bike-wash" :D
 

random angle
and engine ( you can see the valve cover chrome is loosing up)
« Last Edit: September 14, 2012, 04:47:51 am by Viktor.J »
Please ! Take a look and give me feedback in my project thread, its much needed :)
http://forums.sohc4.net/index.php?topic=112745.0

Honda CB750 K2

Offline Viktor.J

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #4 on: September 14, 2012, 04:46:16 am »
left side and ass side  8)
« Last Edit: September 14, 2012, 04:49:53 am by Viktor.J »
Please ! Take a look and give me feedback in my project thread, its much needed :)
http://forums.sohc4.net/index.php?topic=112745.0

Honda CB750 K2

Offline Viktor.J

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #5 on: September 14, 2012, 05:16:52 am »
Here is my so far parts for the dual disc modification.
I have one extra caliper arm, the later model with "three holes mountin". So if anyone would like to buy it give me and offer :D

But minus one caliper arm, this is what i got for 76 $.

Soon im going to use a greasegun or the mastercylinder to force out the caliper piston (they are unused since -85).
Then "glass blasterd" both calipers and both rotors to get rid of the paint, and then polish up the Alu, and finally a couple of varnish layers. I think the alufinish is a bit cleaner and then the black :D

get new brake fluid sealing to both caliper and hopfully no new pistons. Then finaly some new brake pads, any tips about manufacturer and materials ?

as i said, ANY tips and all the do and donts is more then welcome !
« Last Edit: September 14, 2012, 07:27:14 am by Viktor.J »
Please ! Take a look and give me feedback in my project thread, its much needed :)
http://forums.sohc4.net/index.php?topic=112745.0

Honda CB750 K2

Offline 754

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #6 on: September 14, 2012, 07:46:45 am »
 Viktor do someone a favor and trade the chrome covers for unchromed ones...nice bike..
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline Viktor.J

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #7 on: September 14, 2012, 07:55:36 am »
Viktor do someone a favor and trade the chrome covers for unchromed ones...nice bike..

as i said
" Sometime during the years, valve cover, front sprocket cover and generator cover been chromed. And im going to "dechrome" it and fix the aluminum finish. "

This is what im going to do, I have contacted a company in sweden which is going to unchrome the covers and it is more or less waiting for the right , "time and money" :D
Please ! Take a look and give me feedback in my project thread, its much needed :)
http://forums.sohc4.net/index.php?topic=112745.0

Honda CB750 K2

Offline Garystratos201

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #8 on: September 14, 2012, 01:03:20 pm »
Great looking bike. Are the exhaust pipes and paint original ?..........Gary
Visit my build project;
http://forums.sohc4.net/index.php?topic=111620.0

Current ride; Bass boat.... 2005 Ranger 521VX,250 hp Mercury Verado, super charged and direct fuel injected. Not a bass on the lake can out run me !!!

Offline Viktor.J

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #9 on: September 14, 2012, 01:17:16 pm »
Thanks Gary

The exhaustpipes are stockpipes, so they are original. In my opinion one of The worlds most beautiful pipes :)

The color on The otherhand isnt near original ! Its quite redish RED, like "racing red"!
Its looks Good, but later om i want it in à original color and decals !

Please ! Take a look and give me feedback in my project thread, its much needed :)
http://forums.sohc4.net/index.php?topic=112745.0

Honda CB750 K2

Offline iron_worker

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #10 on: September 14, 2012, 01:26:40 pm »
Wow. That's a great looking bike already. A few touch ups and she'll be peeerrrrrrrfect.

IW

Offline Garystratos201

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #11 on: September 14, 2012, 01:45:56 pm »
Man I would love to have set of pipes like that for my project. 1971 K1
Visit my build project;
http://forums.sohc4.net/index.php?topic=111620.0

Current ride; Bass boat.... 2005 Ranger 521VX,250 hp Mercury Verado, super charged and direct fuel injected. Not a bass on the lake can out run me !!!

Offline Viktor.J

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #12 on: September 14, 2012, 02:00:18 pm »
Wow. That's a great looking bike already. A few touch ups and she'll be peeerrrrrrrfect.

IW

Thanks, yeah she is nice but as you say, she needs some love and care :)

 
Man I would love to have set of pipes like that for my project. 1971 K1

Is all about The money :)
http://www.davidsilverspares.co.uk/CB750K1-FOUR-1970-1971-USA/part_168902/ multiply by 4 and add shipping :)



Please ! Take a look and give me feedback in my project thread, its much needed :)
http://forums.sohc4.net/index.php?topic=112745.0

Honda CB750 K2

Offline andy750

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #13 on: September 14, 2012, 02:42:00 pm »
Welcome Viktor!

What size is the rear wheel? Looks a little on the small side?

Cheers
Andy
Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico (CB750K4), 2003 - European Tour (CB750K4), 2004 - SOHC Easy Rider Trip (CB750K4), 2008 - Adirondack Tour 2-up (CB750K4) , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild. And rebirth: http://forums.sohc4.net/index.php/topic,173213.msg2029836.html#msg2029836
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. VStrom DL1000 2003
4. XLR650L 2006

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350

Offline Viktor.J

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #14 on: September 14, 2012, 02:57:20 pm »
Welcome Viktor!

What size is the rear wheel? Looks a little on the small side?

Cheers
Andy

Im not really sure of what you mean :D
if you mean the rims they are original and the tires i dont really know any measurements other than 120mm wide. The bike is 200 km from me so i cant check :(
But maybe its the angles that makes it look small :)


Edit: I have meassured it (while it was still on the bike) and it was between 48-46 cm = 18 inches give or take :)
« Last Edit: October 02, 2012, 10:53:47 am by Viktor.J »
Please ! Take a look and give me feedback in my project thread, its much needed :)
http://forums.sohc4.net/index.php?topic=112745.0

Honda CB750 K2

Offline akinz

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #15 on: September 14, 2012, 05:46:00 pm »
Love the bike mang. Stock and the 4 into 4.... those are awesome.
77 CB550k, Finally completed after 3 long years of a complete teardown and rebuild/modification
77 CB550k, on the backburner to turn into a vintage race bike
79 CBX 1000 an absolute classic I just aquired
2005 Yamaha Raven R6 my street and trackday ride

Offline Garystratos201

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #16 on: September 14, 2012, 08:10:40 pm »
Man I would love to have set of pipes like that for my project. 1971 K1

Yes thats true , Money makes the world go round.............Gary
Visit my build project;
http://forums.sohc4.net/index.php?topic=111620.0

Current ride; Bass boat.... 2005 Ranger 521VX,250 hp Mercury Verado, super charged and direct fuel injected. Not a bass on the lake can out run me !!!

Offline Stev-o

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #17 on: September 14, 2012, 09:09:23 pm »
Welcome From Texas Viktor.  I too am restoring a K2 to "originalish" condition.  My exhaust is also in good cond, must be a good year! 

Why is your bike 200 km away?
'74 "Big Bang" Honda 750K [836].....'71 Honda 750K project.....'76 Honda 550F.....K3 Park Racer.....K5 Fiddy Dolla Special!......CB500 Fiddy Dolla Special too!!............plus plus plus.........

Offline Viktor.J

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #18 on: September 16, 2012, 12:28:11 pm »
Love the bike mang. Stock and the 4 into 4.... those are awesome.

I agree, these bikes special features is what makes them so sweet !
And thats what im planning to "keep" :)

Man I would love to have set of pipes like that for my project. 1971 K1

Yes thats true , Money makes the world go round.............Gary

Well i have got the information that in the US it quite easy to rechrome (expensive in Sweden due to environmental laws). So maybe its much cheapier then buying 4 new ones..... But they are got damn sexy !

Welcome From Texas Viktor.  I too am restoring a K2 to "originalish" condition.  My exhaust is also in good cond, must be a good year! 

Why is your bike 200 km away?

Hi Stev-O
Nice, do you have a project thread ?
Haha peehaps, actually i have seen some rust underneath the lowest pipe on the right side :(
Because i dont have any garage here ( only apartment), and i dont have the driver license yet so im letting my dad run the bike so long :D
Please ! Take a look and give me feedback in my project thread, its much needed :)
http://forums.sohc4.net/index.php?topic=112745.0

Honda CB750 K2

Offline Viktor.J

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #19 on: September 16, 2012, 12:33:01 pm »
Today I hooked up a greasegun to get release the caliper piston, worked fine but i think the piston was quite stuck cause the grease came out from everywhere :)

The Piston looks really fine, so no use of a new one... Does anyone know "how good" the condition of the caliper cylinder walls "should" be ? And what i could do to make it better...

- Grease gun hook up.
- the piston is really smoth and the "white stuff" is just dust...
- the cylinder "looks" worse then it feels. Its a little bit corroded on some spots, but its only cosmetical. You cant feel anything. 
« Last Edit: September 16, 2012, 12:38:54 pm by Viktor.J »
Please ! Take a look and give me feedback in my project thread, its much needed :)
http://forums.sohc4.net/index.php?topic=112745.0

Honda CB750 K2

Offline Viktor.J

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #20 on: September 19, 2012, 09:46:29 am »
I have been thinking on the handlebars.
And i heard and collected some info about the clip-ons to a Honda VF500. The are what i want, higher and clip-ons. As earlier mentioned i dont really like the "ulta low" driver possition when using the "low" clip-ons.

But The are for a 37 mm fork. BUT that wouldnt be any problem right, i mean 1mm steel between and problem solved, right ? even a clip on for like 39 mm forks would be ok, 2 mm steel "schimm" between the fork legs and the handlebar.
Does anyone know if this is OK ? any problems ?

cause i have trouble finding decent clip-ons for a decent price. but if im allowed to use a "bigger" clip on my searching area grows substantially :)

So hit me with info about "older racing, super sport" bikes with clip-ons !

// Viktor
Please ! Take a look and give me feedback in my project thread, its much needed :)
http://forums.sohc4.net/index.php?topic=112745.0

Honda CB750 K2

Offline 754

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #21 on: September 19, 2012, 09:58:39 am »
 If you dechrome your covers, they will probably not look like the originals, the lettering and lines will get smoothed partly off. WWAAAAAYYYYYYY cheaper to polish a good set, and get good money for yours.. but hey if you want to spend money to find that out, go ahead..


Machine a shim with a small lip bigger than 37 mm, then slit the sleeve.. the lip keeps sleeve staight, and from hanging out somewhere.

 
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline Viktor.J

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #22 on: September 19, 2012, 10:20:23 am »
If you dechrome your covers, they will probably not look like the originals, the lettering and lines will get smoothed partly off. WWAAAAAYYYYYYY cheaper to polish a good set, and get good money for yours.. but hey if you want to spend money to find that out, go ahead..


Machine a shim with a small lip bigger than 37 mm, then slit the sleeve.. the lip keeps sleeve staight, and from hanging out somewhere.

 

But as you can tell of the pictures they aren´t in any good condition so i dont se why anyone would pay for that, since you,would have to rechrome them to make it look nice.

In Europe its "no market" for chromed enginecovers, and only the shipping to US would be like 50-100$
Please ! Take a look and give me feedback in my project thread, its much needed :)
http://forums.sohc4.net/index.php?topic=112745.0

Honda CB750 K2

Offline SOHC4 Cafe Racer Fan

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #23 on: September 19, 2012, 02:45:33 pm »
You can also find a variety of aftermarket clip-ons on ebay with the specific fork diameter.  If you choose to go higher-end Tarrozzi makes some beautiful high rise clip-ons that are available from Jim Hinshaw at Fast from the Past.
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2014 MV Agusta Brutale Dragster 800
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold

Offline Viktor.J

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Re: CB750 K2 restoration to "originalish" condition with a touch of "racing".
« Reply #24 on: September 19, 2012, 11:24:40 pm »
You can also find a variety of aftermarket clip-ons on ebay with the specific fork diameter.  If you choose to go higher-end Tarrozzi makes some beautiful high rise clip-ons that are available from Jim Hinshaw at Fast from the Past.

Thanks for the tips, but most of the Ebay clip-ons are looooow :) they have some "higher" or adjustable, bet those are for like 48 mm fork legs, which would be to big. The Tarrozzi high rise clip ons are sweet, but a bit pricey for me, but who knows maybe thats just what ill will have to pay to get what i want :D

My bad, in US they are at 130$+ international shipping, it was in SWEDEN they where a bit pricey 261$+National shipping. Not that pricey, and the look really sweet :D

« Last Edit: September 19, 2012, 11:39:34 pm by Viktor.J »
Please ! Take a look and give me feedback in my project thread, its much needed :)
http://forums.sohc4.net/index.php?topic=112745.0

Honda CB750 K2

 

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