Author Topic: First serious build ever - CB750 K7 Café  (Read 25584 times)

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Offline 70CB750

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Re: First serious build ever - CB750 K7 Café
« Reply #100 on: December 31, 2016, 08:13:22 AM »
Started on the other side. It's a lot more complicated since the caliper bracket includes another cylinder that engages one of the pistons in the rear, and I'm not going to use that, so I do not have anything to mount it to on the other side. So have to make a custom adapter bracket.

I started with changing the offset 10mm by milling that much off the lower mounting point and making a spacer, which seems to work fine.



That's as far as I got today, took a lot of thinking and setting up to be able to do it right.

Needle bearing for caliper mount?
Prokop
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Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #101 on: December 31, 2016, 08:40:25 AM »
Started on the other side. It's a lot more complicated since the caliper bracket includes another cylinder that engages one of the pistons in the rear, and I'm not going to use that, so I do not have anything to mount it to on the other side. So have to make a custom adapter bracket.

I started with changing the offset 10mm by milling that much off the lower mounting point and making a spacer, which seems to work fine.



That's as far as I got today, took a lot of thinking and setting up to be able to do it right.

Needle bearing for caliper mount?
It had three of them stock. I have no idea, never seen it before.

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #102 on: January 04, 2017, 02:41:45 AM »
It's awesome to have a new workshop dedicated for just my projects, just a few minutes away from home. I can go and tinker for just an hour or so, when I want to have some time to myself instead of dedicating my entire afternoon like before.

I really love how the front end and top triple turned out. The bike has another stance, and I absolutely adore these rims on the CB750. So far the project is going to plan.



Got the last milling done of the brake adapter yesterday. So now the front end is completely done, just waiting for the cylinder to arrive from China (I'll take my chances with it).



Also got the carbs cleaned and assembled again. The rust from the tank had clogged quite a bit. Especially the fuel lines and the needle valves (or whatever they're called). Fortunately they weren't damaged, and are once again sealing properly.

I'll go with a bottle for a tank until my new tank arrives... From which I've stopped getting e-mails from the guy making it, so I'm starting to get a bit scared about that. I hope he hasn't decided he doesn't want to do tank and seat anymore. That would be a bummer...



Also removed the intake rubbers from the airbox. One of them is really, really stiff (think plastic). Going to give it a try with soaking in some oil and see if I can mend them, or if I have to try to find another set. Hopefully not.


Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #103 on: January 04, 2017, 03:08:33 AM »
A blend of Wintergreen oil and water, boil the intake boots in it, softens them right up.
Will try this, thanks Cal!

Is it Methyl salicylate you mean by Wintergreen oil, or is it a specific product called Wintergreen oil?

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #104 on: January 04, 2017, 05:43:34 AM »
Here's the standard "process" used by many:

- "Put ~2oz of wintergreen oil into a pan with enough water to cover a set or two of carb boots (maybe 1/2-3/4 gallon depending on pot size).  Put a screen in the bottom so they don't touch the pan, and heat them to near boiling (when those little bubbles start forming on the boots) for about 30 minutes.  When they dry they're like new again.

Make sure ya do it outside unless you want your house smelling like a Wint-O-Green lifesaver for a month."

Is it Methyl salicylate you mean by Wintergreen oil, or is it a specific product called Wintergreen oil?
Yep, same stuff, Professor Chemistry  ;)
Awesome! Thanks very much. I'll return with the results, but I don't see why this wouldn't work!

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #105 on: January 05, 2017, 12:21:23 AM »
Here's the standard "process" used by many:

- "Put ~2oz of wintergreen oil into a pan with enough water to cover a set or two of carb boots (maybe 1/2-3/4 gallon depending on pot size).  Put a screen in the bottom so they don't touch the pan, and heat them to near boiling (when those little bubbles start forming on the boots) for about 30 minutes.  When they dry they're like new again.

Make sure ya do it outside unless you want your house smelling like a Wint-O-Green lifesaver for a month."

Is it Methyl salicylate you mean by Wintergreen oil, or is it a specific product called Wintergreen oil?
Yep, same stuff, Professor Chemistry  ;)
I also ordered an M-unit now from your recommendation! Cheers :)

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #106 on: January 05, 2017, 06:49:48 AM »
I am sure you will like it.  :D Now you just need to pony-up and get an M-Lock too  ;)

I looked back and didn't see any mention of it, but while your forks were apart, did you service the oil, seals, and/or upgrade the springs?
I ordered their new unit, that comes with a Bluetooth connection to enable the ignition button as far as the motorcycle is in range. So, I won't bother with an M-Lock :)

Yeah, new oil, new seals, new bushings. Stock springs, as the CBR1000F has quite a bit stiffer ride stock. I'll evaluate (or rather, let someone who's a lot better at riding than me evaluate) and see how it is.

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #107 on: January 05, 2017, 08:23:05 AM »

I ordered their new unit, that comes with a Bluetooth connection to enable the ignition button as far as the motorcycle is in range. So, I won't bother with an M-Lock :)
Huh?
They've got a new M-unit soon launching, with Bluetooth built in. It comes with some new nifty functions, tracking distances, turning on / off the alarms and getting logs etc. But the best part for myself was using your smartphone instead of the key. Even if you've got an ignition lock, you can use the phone without needing the key (if I understood it correct).

Offline SOHC4 Cafe Racer Fan

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Re: First serious build ever - CB750 K7 Café
« Reply #108 on: January 05, 2017, 09:17:53 AM »

I ordered their new unit, that comes with a Bluetooth connection to enable the ignition button as far as the motorcycle is in range. So, I won't bother with an M-Lock :)
Huh?
They've got a new M-unit soon launching, with Bluetooth built in. It comes with some new nifty functions, tracking distances, turning on / off the alarms and getting logs etc. But the best part for myself was using your smartphone instead of the key. Even if you've got an ignition lock, you can use the phone without needing the key (if I understood it correct).

Any details on this new version of the M-Unit from a website, email or other source.  Sounds interesting, but I haven't seen anything about it on the Interwebs.
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)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.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 and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

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
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #109 on: January 05, 2017, 09:23:03 AM »

I ordered their new unit, that comes with a Bluetooth connection to enable the ignition button as far as the motorcycle is in range. So, I won't bother with an M-Lock :)
Huh?
They've got a new M-unit soon launching, with Bluetooth built in. It comes with some new nifty functions, tracking distances, turning on / off the alarms and getting logs etc. But the best part for myself was using your smartphone instead of the key. Even if you've got an ignition lock, you can use the phone without needing the key (if I understood it correct).

Any details on this new version of the M-Unit from a website, email or other source.  Sounds interesting, but I haven't seen anything about it on the Interwebs.
I'll send you a PM!

Offline SOHC4 Cafe Racer Fan

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Re: First serious build ever - CB750 K7 Café
« Reply #110 on: January 05, 2017, 09:55:06 AM »
Thanks, Oscar!
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)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.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 and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

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
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #111 on: January 05, 2017, 10:09:10 AM »

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #112 on: January 10, 2017, 12:46:11 AM »
Can't decide whether to upgrade the rectifier / regulator. I know that people are saying that there is no reason if the original units aren't broken (which mine aren't), but again - I'm replacing just about everything on this bike so it feels silly to leave these units.

What do you guys say?

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #113 on: January 10, 2017, 03:32:02 AM »
Rick's product has been my preferred unit. For another $105, you eliminate a 40 year old, albeit still probably good, piece of critical electrics.
Alright, taken. Which Rick are we talking about?

Offline cantarauk

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Re: First serious build ever - CB750 K7 Café
« Reply #114 on: January 11, 2017, 12:45:59 AM »
I emailed for some further input on the new M-unit from Motogadget and their response was -


"In a few days/weeks we will have also a 'm.unit blue' for 319 EUR.
It will have connection to an app via Bluetooth.
BUT this connection is limited to specific Android phones (list will be supplied). About 2-3 months later we will have a version for iPhone too"

More than the above they would not give me any further information.

G

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #115 on: January 13, 2017, 06:50:17 AM »
Sorry, try this for reference-
https://cognitomoto.com/collections/electronics/products/ricks-regulator-rectifier-combo-cb350f-cb400f-cb500k-cb550-cb750
Thanks, I've now ordered it (directly from Rick's Motorsport webshop though).

I hate living in Sweden and purchasing items in the US - almost $50 for an item half the size of my hand... :p

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #116 on: January 16, 2017, 01:31:36 AM »
Next time, have a US member ship it to you through the Post Office. Probably cost less than half that much.
Never even thought of that. Will keep it in mind until next time!

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #117 on: January 16, 2017, 04:57:39 AM »
It's now been several months (since July) since I heard back from Cliff Meyer... Sent emails both in November and December without any reply. Starting to worry. I'm hoping that it's just his e-mail acting up, but I haven't been able to find an alternative e-mail to reach him on. Does anyone on here know him or have a way to contact him?

Thanks in advance.

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #118 on: January 16, 2017, 06:25:03 AM »
He's still cranking things out. I would NOT worry about his integrity as he is very reliable. Not sure about his email, but I'll check with a buddy who is quite close to him and PM you contact info to compare against what you have.
Thanks a bunch once again Cal! Not sure what I'd do without you at this stage of my build ;)

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #119 on: January 20, 2017, 10:33:23 AM »


Woop.

Offline SOHC4 Cafe Racer Fan

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Re: First serious build ever - CB750 K7 Café
« Reply #120 on: January 20, 2017, 11:19:14 AM »
Brembo 19RCS is a very potent MC.  I had one on my RC51SP2 and did 1-finger braking.
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)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.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 and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

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
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #121 on: January 23, 2017, 12:34:25 PM »
Trying the Wintergreen Oil trick. Can report that it's quite interesting to heat. Smells bubble gum in my entire workshop. Will be interesting to see if I start seeing pink unicorns!


Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #122 on: April 04, 2017, 10:40:10 AM »
Welp, this goes to #$%*.

I barely have time for anything besides work and family, so I have gotten very little done the last couple of months.

Well, I have changed the ignition system to Pamco, but I cannot get the bike to run properly. I've taken the carb out and cleaned it (twice), I run the fuel from a bottle so no more rust in the fuel line-issues. The slow jets were pulled out, everything else was disassembled and cleaned meticulously. No problem, and nothing was blocked the second time around.

At first it only fired on three cylinders (not #2). Here's a video;


This was after the first cleaning, before the second one. Cleaning it a second time didn't change anything.

I pulled the plugs, and it's running extremely lean. The spark plug on #2 and #4 (which is running) look the same. It's backed up by the fact that spraying starter gas kills the engine, and doesn't rev it. However, this could still be an ignition issue and not a carb issue (if I'm not completely mistaken).

I changed the coils over, which made it run on all four, but not well. And it can't take ANY throttle what so ever, and cannot rev. Still dies if I apply starter gas. See video below;


The noise before it dies is me giving it a tiny bit of throttle.

I honestly am at a stand still. Could it be a timing issue? Could it be the carb? Can I have broken anything? Any ideas?

I've tried running both with and without the air box.

I'd appreciate all the help I can get.

Offline SKTP

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Re: First serious build ever - CB750 K7 Café
« Reply #123 on: April 04, 2017, 11:34:55 AM »
Sorry I am no help with the runnign issues...but I have been in the market for a new modern Master...

after googling yours, how is this possible? Are there fake Brembos? This price seems way too low to be true.

EDIT I can't make it link why?????????


http://www.ebay.com/itm/Brembo-19-RCS-Radial-Brake-Master-Cylinder-For-Kawasaki-Z1000-SX-Z800-ZX-10R-/112317441209?_trksid=p2385738.m2548.l4275

here's what i am trying to link:

« Last Edit: April 04, 2017, 11:41:09 AM by SKTP »
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

Offline cb750tr

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Re: First serious build ever - CB750 K7 Café
« Reply #124 on: April 04, 2017, 12:47:43 PM »
Sorry I am no help with the runnign issues...but I have been in the market for a new modern Master...

after googling yours, how is this possible? Are there fake Brembos? This price seems way too low to be true.

EDIT I can't make it link why?????????


http://www.ebay.com/itm/Brembo-19-RCS-Radial-Brake-Master-Cylinder-For-Kawasaki-Z1000-SX-Z800-ZX-10R-/112317441209?_trksid=p2385738.m2548.l4275


Yes, these are fake Brembos. They use different gaskets, they aren't honed as well, and are overall a lot lower quality. I don't expect mine to last a season, and it's not a permanent part, but it will do during the build stage. If I like it I'll definitely get a proper Brembo.