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Author Topic: 1976 CB750F - first bike, first build - mild cafe  (Read 36771 times)

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Offline flybox1

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #175 on: May 24, 2016, 09:48:09 AM »
After vacuum sync is done, mixture screws are set independently, based on plug color.  Not by idle sound.
Looking good.
Pics of how  you mounted your LED stop/tail light?
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'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline riffman12

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #176 on: May 25, 2016, 12:51:27 PM »
sort of hard to see, but this is how the LED strip sits. It was taped on for the test run, but will be properly mounted once the seat is painted.

My friend behind me said it was quite dim in daylight, but I'm hoping that just because of the low voltage / charging problem.

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Offline SOHC4 Cafe Racer Fan

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #177 on: May 25, 2016, 04:50:31 PM »
Make sure it is visible enough in sunshine, because that's what you'll be riding in most of the time.  You don't want to get rear-ended in LA (or any other) traffic.

Your painter should be able to body fill and blend the seat to the light.
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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 Thousandson

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #178 on: May 27, 2016, 11:46:38 AM »
Looks great. One thing I found out on my 750SS 78', when I did clubman bars. It put me really far forward, great attack position, feels like I am part of the bike. But I had to roll the bars pretty far forward just so they didn't hit the tank. It looks like you did the same thing, I just can't ride for long long distances. I traded out to drag bars, it was a compromise.
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Current ride: 78' Cb750F

Offline SOHC4 Cafe Racer Fan

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #179 on: May 27, 2016, 12:42:27 PM »
Quote from: Thousandson on May 27, 2016, 11:46:38 AM
Looks great. One thing I found out on my 750SS 78', when I did clubman bars. It put me really far forward, great attack position, feels like I am part of the bike. But I had to roll the bars pretty far forward just so they didn't hit the tank. It looks like you did the same thing, I just can't ride for long long distances. I traded out to drag bars, it was a compromise.

A nice alternative are the Tommaselli Condor Clubmans which are adjustable.  You can adjust the bars to a zero or even positive angle because the attachment point remains static.  They are pricier than a standard clubmans.  The adjustment points are indexed and have a LARGE allen bolt so they do not move even when applying lots of force.



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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 seanbarney41

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #180 on: May 27, 2016, 01:20:49 PM »
Quote from: Thousandson on May 27, 2016, 11:46:38 AM
Looks great. One thing I found out on my 750SS 78', when I did clubman bars. It put me really far forward, great attack position, feels like I am part of the bike. But I had to roll the bars pretty far forward just so they didn't hit the tank. It looks like you did the same thing, I just can't ride for long long distances. I traded out to drag bars, it was a compromise.
yup...standard clubmans dont really work with these bikes.  They came about for 1960s twins and singles raced in sportsman classes
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Offline riffman12

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #181 on: July 10, 2016, 07:05:45 PM »
so after almost exactly a year, this project is finally finished. Rode it all day today, high speed runs, twisties, around town. So much fun to ride!

Huge thank you to all of you who helped me through the way. Couldn't have done it without all of you. Here's some pics:











I'm sure it's not completely done. More things will come up, but for now it's just where I want it.  :D
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Offline SOHC4 Cafe Racer Fan

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #182 on: July 10, 2016, 08:47:52 PM »
It came out great.  Glad you got the seat/taillight sorted.
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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 Yozzer74

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #183 on: July 15, 2016, 10:06:09 AM »
Bike looks great how was the fitment of the exhaust pipe
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Offline riffman12

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #184 on: July 25, 2016, 10:39:25 AM »
Thanks guys!

I'm still having a bit of wobble in the outside rim of the front comstar. I've had it up to 85mph and there is still no shake or anything through the bars, so I'm hoping the wheel is just a bit out of round (and balanced properly). Brake rotors are still dead straight so there is no movement at the hub. Is this normal for comstars?

Quote from: Yozzer74 on July 15, 2016, 10:06:09 AM
Bike looks great how was the fitment of the exhaust pipe

Thank you! the exhaust can be a bit of a pain to get all 4 headers lined up with the head. Just takes a bit of muscle. Once it's in it fits the bike really well.


Here's a recent shot of the bike:

« Last Edit: July 25, 2016, 11:46:08 AM by riffman12 »
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Offline seanbarney41

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #185 on: July 25, 2016, 12:36:18 PM »
My comstar does exactly that...visual wobble at speeds of about 30 to 50, above 50 you can't see it, no affect on handling or how the bike rides
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If it works good, it looks good...

Offline SOHC4 Cafe Racer Fan

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #186 on: July 25, 2016, 06:44:57 PM »
Trippy!
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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 seanbarney41

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #187 on: July 25, 2016, 06:56:25 PM »
every spoked wheel I have ever had did similar except some could be felt and did affect handling
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Offline Retro Rocket

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #188 on: July 25, 2016, 11:15:52 PM »
Quote from: seanbarney41 on July 25, 2016, 06:56:25 PM
every spoked wheel I have ever had did similar except some could be felt and did affect handling

Sean, was that before or after dropping acid...?   ;D :P
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750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline seanbarney41

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #189 on: July 26, 2016, 03:10:01 PM »
Quote from: Retro Rocket on July 25, 2016, 11:15:52 PM
Quote from: seanbarney41 on July 25, 2016, 06:56:25 PM
every spoked wheel I have ever had did similar except some could be felt and did affect handling

Sean, was that before or after dropping acid...?   ;D :P
all of the above
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If it works good, it looks good...

Offline Retro Rocket

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #190 on: July 26, 2016, 03:32:15 PM »
Quote from: seanbarney41 on July 26, 2016, 03:10:01 PM
Quote from: Retro Rocket on July 25, 2016, 11:15:52 PM
Quote from: seanbarney41 on July 25, 2016, 06:56:25 PM
every spoked wheel I have ever had did similar except some could be felt and did affect handling

Sean, was that before or after dropping acid...?   ;D :P
all of the above

I was wondering because, my carpet had those very same symptoms.... 8)
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750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline SOHC4 Cafe Racer Fan

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #191 on: July 26, 2016, 04:53:36 PM »
Quote from: riffman12 on July 25, 2016, 10:39:25 AM
Thanks guys!

I'm still having a bit of wobble in the outside rim of the front comstar. I've had it up to 85mph and there is still no shake or anything through the bars, so I'm hoping the wheel is just a bit out of round (and balanced properly). Brake rotors are still dead straight so there is no movement at the hub. Is this normal for comstars?

Quote from: Yozzer74 on July 15, 2016, 10:06:09 AM
Bike looks great how was the fitment of the exhaust pipe

Thank you! the exhaust can be a bit of a pain to get all 4 headers lined up with the head. Just takes a bit of muscle. Once it's in it fits the bike really well.


Here's a recent shot of the bike:



Do you get any speed wobble at higher highway speeds?
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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 riffman12

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #192 on: July 27, 2016, 08:44:22 AM »
nope I've been up to about 85mph and it feels really solid

only annoying thing is a vibration through the footpegs that makes my feet go numb after a while. But that feels more like it's from the engine as I don't really get it through the bars.
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Offline SOHC4 Cafe Racer Fan

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Re: 1976 CB750F - first bike, first build - mild cafe
« Reply #193 on: July 27, 2016, 10:23:44 AM »
Quote from: riffman12 on July 27, 2016, 08:44:22 AM
nope I've been up to about 85mph and it feels really solid

only annoying thing is a vibration through the footpegs that makes my feet go numb after a while. But that feels more like it's from the engine as I don't really get it through the bars.

If you haven't experienced numbness in your hands riding with clubmans, you haven't been on a long enough ride!  ;)
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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
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