Topic: CB750 K2 restomod to "originalish" condition // Forkbrace added ! ! !

[Viktor.J]

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

[Terry in Australia]

Where are the pics Viktor? Cheers, Terry.

[Viktor.J]

Hi Terry, my internett line or the website doesn't really seem to want me posting the pictures.... but i´m trying

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 !

[Viktor.J]

Trying smaller pictures


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

random angle
and engine ( you can see the valve cover chrome is loosing up)

[Viktor.J]

left side and ass side 

[Viktor.J]

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

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

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 !

[754]

 Viktor do someone a favor and trade the chrome covers for unchromed ones...nice bike..

[Viktor.J]

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"

[Garystratos201]

Great looking bike. Are the exhaust pipes and paint original ?..........Gary

[Viktor.J]

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 !

[iron_worker]

Wow. That's a great looking bike already. A few touch ups and she'll be peeerrrrrrrfect.

IW

[Garystratos201]

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

[Viktor.J]

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

[andy750]

Welcome Viktor!

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

Cheers
Andy

[Viktor.J]

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
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

[akinz]

Love the bike mang. Stock and the 4 into 4.... those are awesome.

[Garystratos201]

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

[Stev-o]

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?

[Viktor.J]

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

[Viktor.J]

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. 

[Viktor.J]

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

[754]

 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.

 

[Viktor.J]

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$

[SOHC4 Cafe Racer Fan]

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.

[Viktor.J]

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

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