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Author Topic: New Age Cafe Racer - Honda CB750 -79 from Finland  (Read 6207 times)

Offline Popeye SXM

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Re: New Age Cafe Racer - Honda CB750 -79 from Finland
« Reply #50 on: Mar 05, 2018, 12:08:48 »
I am not sure these sprockets fit your bike, you will have to measure the shaft, but check Speed Moto out. www.speedmotoco.com/category-s/6.htm or PBI Sprockets, www.shop.pbisprockets.com/product.sc;jsessionid=9D81BFE4A4E43B6242C22057A77DD544.p3plqscsfapp004?productId=465
« Last Edit: Mar 05, 2018, 12:11:50 by Popeye SXM »

Offline cb250nproject

  • Posts: 313
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Re: New Age Cafe Racer - Honda CB750 -79 from Finland
« Reply #51 on: Mar 06, 2018, 00:13:41 »
Insane build canít wait to see it finished


Sent from my iPhone using DO THE TON
first cafe build was an incomplete learning experience, more of a test run for the real thing FRANKENHONDA II

Offline Marcushyden

  • Posts: 45
Re: New Age Cafe Racer - Honda CB750 -79 from Finland
« Reply #52 on: Mar 06, 2018, 08:17:27 »
That's some serious welding - I didn't know you could effectively weld hardened steel like a countershaft sprocket.  Looks like two sprockets became one?  Turned down another to use the splined section?

Too bad the weld will be invisible once installed - that's some pretty welding.
I didn't know either, but somehow my friend did it. He said also that this thing will last and do not break in two pieces, with power bike has atm.


I am not sure these sprockets fit your bike, you will have to measure the shaft, but check Speed Moto out. www.speedmotoco.com/category-s/6.htm or PBI Sprockets, www.shop.pbisprockets.com/product.sc;jsessionid=9D81BFE4A4E43B6242C22057A77DD544.p3plqscsfapp004?productId=465
I will check these out


Insane build canít wait to see it finished
Sent from my iPhone using DO THE TON
Thanks!  8)

Offline LightsOut

  • Posts: 68
Re: New Age Cafe Racer - Honda CB750 -79 from Finland
« Reply #53 on: Mar 07, 2018, 09:35:41 »
If you know the company who makes these offset sprockets in Germany, please let know, because you never know when you need on of those  :)

KrŁger & Junginger - http://www.krueger-junginger.de/html/versatzritzel.html
Ritzel is apparently sprocket in german :)

Offline Marcushyden

  • Posts: 45
Re: New Age Cafe Racer - Honda CB750 -79 from Finland
« Reply #54 on: Mar 19, 2018, 11:24:41 »
UPDATE!

As I told in my previous post, the bike was in a workshop for exhaust modification and to plug tachometer hole.

Around 1,5 weeks ago, I found used carbs from Germany. Those should be much easier to adjust/set/tune to work with pods.
I called to the seller and we talked several times. Carbs are in good condition and straight from the bike, so they haven't been laying down for long.

I paid upfront and crossed my fingers, that the package will arrive and it includes right items  ;D

Finally, I got the package and these beauties were inside:




From 1985 Suzuki GSX-R Mikuni VM29SS Flatslide carbs
The package included 6 sets of different size jets.

I delivered carbs to the workshop as fast as I could.

They changed the distance of the carbs to each other, so it could fit.
They also made sleeves for intake rubbers to fit them.


Yesterday I picked up my bike and I think the work they have done, is brilliant  8)

Tachometer hole was blocked by detachable piece.



Carbs



 
While they made this fitment, they checked the condition of the carbs. Everything was good. The only thing they fixed was twisted choke rod.
Still, have to clean outer shell of the carbs.

I ordered new pods, although those velocity stacks look really good  8)


What about the exhaust?
Firstly I wanted 4-2 exhaust system with two exhaust tips.
We put that idea aside because the chain was so low, that exhaust tip on that side would look terrible...

Also, we needed as much ground clearance as possible because the bike is way lower than original.
The 4-1 system would have so huge connector that I didn't want it.

The workshop suggested that we do 4-2-1 system

First pictures of connector pipes:


Here are the pics:













I know this thing will not be the quietest bike in a hood, but the silencer will have a tube, wrapped in silencing fabric, so will see if it makes a difference...
If not, I have to buy a real silencer

This Friday I am finally able to move in the new garage and can get to the business!
Three most crucial jobs are to get chainline corrected, make a new bracket for rear shock(s) and to fabricate rear cowl.
« Last Edit: Apr 23, 2018, 07:29:41 by Marcushyden »

Offline Marcushyden

  • Posts: 45
Re: New Age Cafe Racer - Honda CB750 -79 from Finland
« Reply #55 on: Apr 07, 2018, 08:22:31 »
Things happening in my garage and summer is coming fast!

My own deadline that I set to myself is 1st of June (yes, this year!  ;D)
If I don't face any major problems, I think I can finish this before June

I'm pretty sure I mention in my previous posts that I have to move my garage to new location.
It happened two weeks ago.

Found a new place and I'm sure that I don't run out of space  ;D






Recap of whats going on

Bought new rear sprocket and chain. The chain is 530 X-ring and rear sprocket is Snell's 40 tooth.

We've been fighting with the chainline to long. Finally I can say it is straight! Problem was solved with that offset front sprocket.








It helped a lot when I bought chainlining tool. It doesn't looks bullet straight in this pic, but should be




We replaced rear chain tension bolt, because old ones were damaged and they had very small head
I have ordered new wheel bearings also.




First time ever, I was able to fit seat to the bike with tank on.
I like it a lot and I was able to get more riding feeling when I sat on the bike.

(Please, do not note that awful rear cowl  ;))






Still able to find few "cafe racer" twists or touches from this bike


I like the lines in this pic






Some of you notice earlier that I might have a problem with my fuel petcock.
That because it is located in back of the tank and tank is leaning forward a bit.

So will it work? Do I get enough fuel out of it?

We tested this out:
Capacity of the tank is 15 litres
Petcock in On-position -> 11 litres came out easily
After that, petcock in Reserve-position -> 3 litres came out

Overview:
Basically there is 1-2 litres fuel that cannot be sucked in the engine.
I think that 12-13 litres is okay. I'm used to fill up my tank when I'm running around 50% of capacity of the tank.
And we are not building touringbike  ;)

New licenceplate holder came and minor modifications have to be done.
New ignitionswitch came and I already figured out, where I want to locate it


Next week I'm planning to do smaller tasks, because I'm waiting my new rear shock to arrive.
(I'm not going to use those two cheap china shock I ordered)

I'll get back to you, when I have something more to share  8)
« Last Edit: Apr 23, 2018, 07:31:32 by Marcushyden »

Offline J-Rod10

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Re: New Age Cafe Racer - Honda CB750 -79 from Finland
« Reply #56 on: Apr 07, 2018, 08:27:08 »
It may not have much of an effect, but it may. But, a 4-2-1, you want 1 & 4 connected, and 2 & 3.

Offline Marcushyden

  • Posts: 45
Re: New Age Cafe Racer - Honda CB750 -79 from Finland
« Reply #57 on: Apr 07, 2018, 08:32:22 »
It may not have much of an effect, but it may. But, a 4-2-1, you want 1 & 4 connected, and 2 & 3.

I'm feeling stupid right now, but what are you saying?
I don't know which question did you answer  :-[

Online irk miller

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Re: New Age Cafe Racer - Honda CB750 -79 from Finland
« Reply #58 on: Apr 07, 2018, 09:28:13 »
I'm feeling stupid right now, but what are you saying?
I don't know which question did you answer  :-[

He's referring to your exhaust.  Because of the firing order on these, best performance is achieved when exhaust port 1/4 and 2/3 are matched together.  You have 1/2 and 3/4 matched.

Offline J-Rod10

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Re: New Age Cafe Racer - Honda CB750 -79 from Finland
« Reply #59 on: Apr 07, 2018, 12:22:03 »
What Irk said.

This is the proper routing for a 4-2-1 header.

Something or another to do with exhaust scavenging.

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