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Author Topic: Cb650 Cafe racer  (Read 14254 times)

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Offline dkihlgren

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Re: Cb650 Cafe racer
« Reply #50 on: June 05, 2020, 08:36:14 AM »
Quote from: SOHC4 Cafe Racer Fan on June 05, 2020, 08:10:42 AM
That's not much room even if you swap to a 520 to allow for any slack.  I know it seems more drastic, but if you are going to mod the brace, why not replace with with a wider arc piece (symmetrical on both sides) to accommodate the chain.  I know that the brace is primarily to increase rigidity than structural integrity, but it seems like notching neuters it as a bracing device and makes it more cosmetic.  Up to you though.
Maby I'll cut it off and make a new one. I like the clean look. Steel is cheap. It's a steep learning curve now. Both design and welding
« Last Edit: June 05, 2020, 08:42:29 AM by dkihlgren »
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Offline SOHC4 Cafe Racer Fan

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Re: Cb650 Cafe racer
« Reply #51 on: June 05, 2020, 10:20:15 AM »
Quote from: dkihlgren on June 05, 2020, 08:36:14 AM
Quote from: SOHC4 Cafe Racer Fan on June 05, 2020, 08:10:42 AM
That's not much room even if you swap to a 520 to allow for any slack.  I know it seems more drastic, but if you are going to mod the brace, why not replace with with a wider arc piece (symmetrical on both sides) to accommodate the chain.  I know that the brace is primarily to increase rigidity than structural integrity, but it seems like notching neuters it as a bracing device and makes it more cosmetic.  Up to you though.
Maby I'll cut it off and make a new one. I like the clean look. Steel is cheap. It's a steep learning curve now. Both design and welding

I'm enjoying the progress and your work on the bike.
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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 dkihlgren

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Re: Cb650 Cafe racer
« Reply #52 on: June 06, 2020, 12:46:55 PM »
Quote from: SOHC4 Cafe Racer Fan on June 05, 2020, 10:20:15 AM
Quote from: dkihlgren on June 05, 2020, 08:36:14 AM
Quote from: SOHC4 Cafe Racer Fan on June 05, 2020, 08:10:42 AM
That's not much room even if you swap to a 520 to allow for any slack.  I know it seems more drastic, but if you are going to mod the brace, why not replace with with a wider arc piece (symmetrical on both sides) to accommodate the chain.  I know that the brace is primarily to increase rigidity than structural integrity, but it seems like notching neuters it as a bracing device and makes it more cosmetic.  Up to you though.
Maby I'll cut it off and make a new one. I like the clean look. Steel is cheap. It's a steep learning curve now. Both design and welding

I'm enjoying the progress and your work on the bike.
Thanks! I'm slowly getting closer to my goal of a my vision of a CR650
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Offline dkihlgren

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Re: Cb650 Cafe racer
« Reply #53 on: June 11, 2020, 12:46:14 AM »
Made a beta version of a new choke linkage. Have to adjust geometry a little before I make the final version.

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Offline dkihlgren

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Re: Cb650 Cafe racer
« Reply #54 on: June 11, 2020, 09:46:55 AM »
Hope this will not leak oil... Added thread locker that seals. Oil lines hopefully arrives tomorrow or early next week.

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Offline DaveBarbier

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Re: Cb650 Cafe racer
« Reply #55 on: June 11, 2020, 11:56:07 AM »
Cool, I’m looking forward to it being finished.
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Offline SOHC4 Cafe Racer Fan

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Re: Cb650 Cafe racer
« Reply #56 on: June 11, 2020, 03:42:09 PM »
Quote from: DaveBarbier on June 11, 2020, 11:56:07 AM
Cool, I’m looking forward to it being finished.
Me, too.  This just might get me off my tuckus to work on mine.
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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 dkihlgren

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Re: Cb650 Cafe racer
« Reply #57 on: June 12, 2020, 02:27:58 AM »
Put some clear coat on the seat. So rewarding with clear
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Offline dkihlgren

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Re: Cb650 Cafe racer
« Reply #58 on: June 16, 2020, 04:10:24 AM »
Maby a bit on the long side, but a bit to short would have been a disaster.


Last piece of the puzzle is in the making. Need an adapter plate to make the 550 dyno cover to fit. Tried cutting the aluminum plate with an angle grinder. Even with a aluminium disc it was difficult. Plasma cutter was a success!
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Offline DaveBarbier

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Re: Cb650 Cafe racer
« Reply #59 on: June 16, 2020, 04:18:51 AM »
Awesome! Once it’s running open the tappet covers and have a look for a healthy amount of oil splashing around. Only thing I’m a little nervous about is how much the double banjo bolts stick out from the head. It’s like the first thing that would get ripped off if you went down. That’s how it looks in the picture at least. I wonder if you could use hard line from under the ignition cover and route it up between the 2&3 intake runners staying close to the engine and then branch out with the flexible line to either side of the head.
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Offline SOHC4 Cafe Racer Fan

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Re: Cb650 Cafe racer
« Reply #60 on: June 16, 2020, 08:36:30 AM »
I like the idea of the oil lines, but you should definitely shorten that one line up so it doesn't get caught on the rider's/your leg in an inopportune time.
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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 dkihlgren

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Re: Cb650 Cafe racer
« Reply #61 on: June 17, 2020, 04:48:05 AM »
Quote from: SOHC4 Cafe Racer Fan on June 16, 2020, 08:36:30 AM
I like the idea of the oil lines, but you should definitely shorten that one line up so it doesn't get caught on the rider's/your leg in an inopportune time.
I rerouted the oil line a bit.

Adapter plate done. Plasma cutter and rotating file worked fine

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Offline dkihlgren

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Re: Cb650 Cafe racer
« Reply #62 on: June 20, 2020, 08:04:09 AM »
So close now! Will so some checks and then it’s startup. Still have some stuff to do with stator mount. But I’ll start without charging Next project will be to tidy up all cabling around the head light.
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Offline grcamna2

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Re: Cb650 Cafe racer
« Reply #63 on: June 20, 2020, 08:50:32 AM »
That rotor,is that a VFR rotor ?
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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline dkihlgren

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Cb650 Cafe racer
« Reply #64 on: June 20, 2020, 09:08:48 AM »
Quote from: grcamna2 on June 20, 2020, 08:50:32 AM
That rotor,is that a VFR rotor ?
Yes a vfr800 -98. The problem with 650 is the dyno cover. I manage to fit a 550 cover. Not a perfect fit.. Might have to learn aluminium casting to make one that fits perfect.
« Last Edit: June 20, 2020, 09:12:16 AM by dkihlgren »
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Offline SOHC4 Cafe Racer Fan

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Re: Cb650 Cafe racer
« Reply #65 on: June 20, 2020, 05:13:18 PM »
Nice re-route of the oil line.  This is coming together nicely.
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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 dkihlgren

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Re: Cb650 Cafe racer
« Reply #66 on: June 21, 2020, 02:14:13 AM »
No startup today. One carb is leaking fuel. It’s from the float bowl gasket. Ordered a kit and will try to make it work for at short test start.
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Offline DaveBarbier

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Re: Cb650 Cafe racer
« Reply #67 on: June 21, 2020, 04:19:53 AM »
Fuel level shouldn’t be that high anyway. Did you tap on the bowl with a screwdriver handle to see if it was just hung up?
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Offline dkihlgren

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Re: Cb650 Cafe racer
« Reply #68 on: June 21, 2020, 08:27:04 AM »
Quote from: DaveBarbier on June 21, 2020, 04:19:53 AM
Fuel level shouldn’t be that high anyway. Did you tap on the bowl with a screwdriver handle to see if it was just hung up?
Aah I’ll try that
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Offline dkihlgren

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Re: Cb650 Cafe racer
« Reply #69 on: June 30, 2020, 05:17:29 AM »
So close now! Change gaskets in all carbs. Result threads on one screw came out with the screw. So now I’ll have to make a thread insert.

Stator is in place now. Only have to drill for screws


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Offline grcamna2

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Re: Cb650 Cafe racer
« Reply #70 on: June 30, 2020, 09:12:49 AM »
Nice to see That stator in the 650  8)
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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline dkihlgren

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Re: Cb650 Cafe racer
« Reply #71 on: July 01, 2020, 01:32:21 AM »
Made an insert for the stripped threads. Worked great. Carbs should be ok now
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Offline dkihlgren

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Re: Cb650 Cafe racer
« Reply #72 on: July 04, 2020, 02:09:52 AM »
Old screws did not fit cb550 cover with spacer.. Have to test start today!
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Offline dkihlgren

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Re: Cb650 Cafe racer
« Reply #73 on: July 05, 2020, 01:13:20 AM »
It’s running folks!
Now I’ll have to connect charging from regulator and do some checks. None of that rattling noise is there anymore.

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Offline grcamna2

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Re: Cb650 Cafe racer
« Reply #74 on: July 05, 2020, 01:35:43 AM »
Quote from: dkihlgren on July 05, 2020, 01:13:20 AM
It’s running folks!
Now I’ll have to connect charging from regulator and do some checks. None of that rattling noise is there anymore.


The idle sounds So Smooth and balanced !
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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.
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