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Author Topic: 76 CB550 Cafe build  (Read 87028 times)

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Offline tshrey

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Re: 76 CB550 Cafe build
« Reply #400 on: May 16, 2019, 10:56:37 AM »
Forks from a GSXR600 with upper and lower triple clamps - ebay & luck
All balls racing bearing to match the above with a 1975 cb550 frame - all balls racing
Cognito Moto front hub for GSXR to laced wheels conversion - cognito moto
Sun 18" rim x2 - cognito moto
Spoke package x2 - cognito moto

Pick the rim width you want based on the size tire you want to run.  I'm not running a wide tire in the back, I wanted to keep the profile the same front and rear.


Yeah, I'm not going to search the web for you to provide you with links.
« Last Edit: September 08, 2020, 07:34:29 PM by tshrey »
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Offline tshrey

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Re: 76 CB550 Cafe build
« Reply #401 on: August 05, 2019, 07:18:59 AM »
Terribly slow progress, picked up a new MT-09 and have been riding that as much as possible.

Finally got the rear tail installed and made a carbon fiber wheel well liner for the bottom of the tail.  Inside the rear hoop is a small aluminum frame to hold the LiFePo battery, didn't get pics of that.  Need to look at exhausts next; that and ignition and I can be in a position to finally start the bike.


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Offline tshrey

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Re: 76 CB550 Cafe build
« Reply #402 on: October 21, 2019, 06:58:28 AM »
Headers installed.  Need to decide on an ignition system, adjust the valves and put in a couple basic wires to try starting the bike up.  Once I hear it running I think the project will get very real very fast.


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Offline SOHC4 Cafe Racer Fan

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Re: 76 CB550 Cafe build
« Reply #403 on: October 21, 2019, 10:38:22 AM »
Your bike is looking nice.  Dyna S, Pamco or C5 should all work well with it.
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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)

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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 joeyvans

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Re: 76 CB550 Cafe build
« Reply #404 on: October 21, 2019, 10:42:21 AM »
Quote from: tshrey on October 21, 2019, 06:58:28 AM
Need to decide on an ignition system, adjust the valves and put in a couple basic wires to try starting the bike up.

Don’t forget the fuel/air delivery system.



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Offline tshrey

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Re: 76 CB550 Cafe build
« Reply #405 on: October 21, 2019, 12:58:01 PM »
CR26's are sitting off on the side of the photo :)

But that does remind me that I need to figure out the fuel tank outlet, everyone says the stock one interferes with CR carbs.
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Offline tshrey

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Re: 76 CB550 Cafe build
« Reply #406 on: December 01, 2019, 01:21:23 PM »
Day in the garage.  Been worried about this since I completed the taper spacer for the CBR alternator - I finally used some valve grinding compound on the spacer for the final interference fit and installed the stator on my adapter into the housing.  There is stupidly little space between the rotor and stator and I worried about my machining accuracy for the stator adapter.  Put some sharpie marks on each lobe and kicked the engine through several rotations - no smears or worn off sharpie!!!

Back out to adjust the valves now.  Any tips or tricks that aren't in the service manual?

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Offline tshrey

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Re: 76 CB550 Cafe build
« Reply #407 on: January 12, 2020, 01:25:41 PM »
Finally set the valve clearances and ordered a Dyna S ignition system. 

I'll be running CR 26's on this bike, got them from a forum member so not sure what jets are in them.  Anyone have starting recommendations for me?  I have a MRieck stage 2 port job on my heads and 596 pistons.


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Offline SOHC4 Cafe Racer Fan

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Re: 76 CB550 Cafe build
« Reply #408 on: January 12, 2020, 03:19:51 PM »
Did you decide on an ignition system? 

What do you have left wiring-wise?
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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 tshrey

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Re: 76 CB550 Cafe build
« Reply #409 on: January 12, 2020, 03:27:29 PM »
Dyna ignition.

No wiring done at all really, just going to rig up temporary stuff to start the bike.
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Offline tshrey

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Re: 76 CB550 Cafe build
« Reply #410 on: January 24, 2020, 08:50:53 AM »
Dyna S is ready to go.  Anyone have pictures of the timing assembly.  The instructions have none and I'm not sure what stock pieces I'm supposed to take off.  It appears that the dyna rotor requires removal of the entire stock timing plate but then I have no idea where TDC is so that doesn't seem right.
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Offline tshrey

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Re: 76 CB550 Cafe build
« Reply #411 on: January 25, 2020, 01:58:01 PM »
So I figured out the issue is the spark advance weights were frozen in place and the stock rotor wouldn't come off.  All that is soaking now so hopefully I can get it apart. 

Got jet settings from a customer of M Rieck's that has the same engine setup as I do, so I have all the jets coming.  Going to be time to fire it up soon.
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Offline MRieck

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Re: 76 CB550 Cafe build
« Reply #412 on: January 26, 2020, 06:01:47 AM »
 Wow.....your bike is really nice. Great work! Great thing is it should will not only look pretty it will perform.....can't have one without the other in my book. ;)
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Offline Godffery

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Re: 76 CB550 Cafe build
« Reply #413 on: January 29, 2020, 12:14:02 PM »
Quote from: tshrey on January 12, 2020, 01:25:41 PM
Finally set the valve clearances and ordered a Dyna S ignition system. 

I'll be running CR 26's on this bike, got them from a forum member so not sure what jets are in them.  Anyone have starting recommendations for me?  I have a MRieck stage 2 port job on my heads and 596 pistons.



 Here is a good basic starting point:
Main jet, #105
Pilot/Slow jet, #55
Jet needle, #YY8, clip #3
Main air jet, #220
Starter jet, #45
Valve seat, #3.2
Air screw, .75 turns out
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Offline tshrey

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Re: 76 CB550 Cafe build
« Reply #414 on: February 03, 2020, 06:26:27 AM »
Thanks.  I only knew about four of those things.  Is there a manual of any kind that shows which jets are where?  Specifically I don't know what the starter jet and valve seat are.
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Offline calj737

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Re: 76 CB550 Cafe build
« Reply #415 on: February 03, 2020, 08:01:04 AM »
Help any?
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Offline Godffery

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Re: 76 CB550 Cafe build
« Reply #416 on: February 03, 2020, 05:56:45 PM »
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Offline MRieck

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Re: 76 CB550 Cafe build
« Reply #417 on: February 04, 2020, 04:26:50 AM »
Quote from: tshrey on February 03, 2020, 06:26:27 AM
Thanks.  I only knew about four of those things.  Is there a manual of any kind that shows which jets are where?  Specifically I don't know what the starter jet and valve seat are.
Starter jet is located in the float bowls.
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Offline tshrey

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Re: 76 CB550 Cafe build
« Reply #418 on: February 04, 2020, 08:36:36 AM »
You guys rock!
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Offline tshrey

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Re: 76 CB550 Cafe build
« Reply #419 on: August 03, 2020, 11:01:26 AM »
It's only been six months, I'm on a roll  :-\


So ignition is installed and timed in, enough wiring is in place to start the bike and the bike is filled with oil.  I installed the recommended jets.  I rigged up a temporary fuel tank.


I don't know where any hoses go.  Anyone have even a pic of CR's installed on a bike?  One line must be vacuum to the top of the valve cover, one has to be fuel and there must be an overflow port somewhere.

I should have put fuel injection in this bike, I could have had it running a year ago and tuned it myself.  This carburetor stuff is for the birds  :)   What I really want to do is find a crashed Zero and put the motor/battery/speed controller in this.  Old school looks, light weight and full torque at zero rpm.
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Offline river

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Re: 76 CB550 Cafe build
« Reply #420 on: August 05, 2020, 08:04:37 PM »
Can't help on the CR questions but...keep at it man. Bike looks so damn clean it's gonna be worth it in the end. I fought the carbs at altitude forever but once it's solved you're good. Can't wait to hear this thing.
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Squirrel 1.0 http://forums.sohc4.net/index.php/topic,127186.2050.
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Squirrel 2.0
http://forums.sohc4.net/index.php/topic,176846.msg2055831.html#msg2055831

Squirrel 3.0
http://forums.sohc4.net/index.php/topic,185362.msg2146449.html#msg2146449


"You wouldn't think that out here...a man could simply run clear...out of country but oh my...oh my...nothing but the light." -Ben Nichols

Offline tshrey

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Re: 76 CB550 Cafe build
« Reply #421 on: August 23, 2020, 09:21:06 AM »
So the CR26 kit I got from another member on here.  It is 'used' but it was obviously never installed or even opened.  Two things, one there is not enough room for the outboard pods without hitting the frame and two, I seem to be missing some kind of adapter that lets the larger opening of the pod fit on the inlet for the carb (which will only make the clearance issue worse).  Any ideas? @Godffery these might be one of your kits, there was a Power Barn sticker in the box.


« Last Edit: August 23, 2020, 11:52:42 AM by tshrey »
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Offline tshrey

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Re: 76 CB550 Cafe build
« Reply #422 on: August 23, 2020, 11:57:23 AM »
Answering my own questions so far.  The intake manifolds were not even close to flat, the outboard connection to the carbs was 1.5 mm thicker in total than the inside.  So I put both of those on the mill and made them flat.  That bought me a couple mm of space.  Then I realized you could jam the bottom of the K&N coupling in between the intake of the carb and a protrusion on the float bowls; once you did that you could crank down on the hose clamp and the filter is secure and has space.



I still don't know what the nipples on the carbs are.  The bottom one in this pic is the only nipple in this line, the rest of them are coupled together so this must be the fuel intake.  But each carb has it's own nipple on the front - what the hell is that for?

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Offline river

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Re: 76 CB550 Cafe build
« Reply #423 on: August 23, 2020, 05:34:33 PM »
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Squirrel 1.0 http://forums.sohc4.net/index.php/topic,127186.2050.
ml

Squirrel 2.0
http://forums.sohc4.net/index.php/topic,176846.msg2055831.html#msg2055831

Squirrel 3.0
http://forums.sohc4.net/index.php/topic,185362.msg2146449.html#msg2146449


"You wouldn't think that out here...a man could simply run clear...out of country but oh my...oh my...nothing but the light." -Ben Nichols

Offline MRieck

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Re: 76 CB550 Cafe build
« Reply #424 on: August 23, 2020, 06:01:44 PM »
Those nipples are for the starter jets. Put some tubes on them and lead them out about 6". If you don't crap gets into them and the will not let the rubber closing seal seat. All sorts of bull$hit ensues after that. Only took me about 10 years to figure that out,
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