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Author Topic: Blackfin CB750 F1 BLASTER  (Read 28029 times)

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Offline SOHC4 Cafe Racer Fan

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Re: Blackfin CB750 F1 BLASTER
« Reply #175 on: April 03, 2015, 01:34:08 PM »
Quote from: Blackfin5 on April 03, 2015, 12:30:05 PM
Save the IV for the 915 with Carrilos and b/l crank.

Hold the phone. Which build is that for?  Awesomeness!!
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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 Blackfin5

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Re: Blackfin CB750 F1 BLASTER
« Reply #176 on: April 03, 2015, 01:47:18 PM »
For when after the Blaster 836 top end fails.  I figure, hopefully, at least 2 years or more down the road.
« Last Edit: April 03, 2015, 08:37:16 PM by Blackfin5 »
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Offline SOHC4 Cafe Racer Fan

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Re: Blackfin CB750 F1 BLASTER
« Reply #177 on: April 03, 2015, 02:31:07 PM »
I suppose if you like to pin the throttle wide open all the time.  ;)  The 915 sounds mighty Tige like.
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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 Blackfin5

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Re: Blackfin CB750 F1 BLASTER
« Reply #178 on: April 04, 2015, 07:15:05 AM »
Tige's 915 is the inspiration but that plan is on the back burner till way down the road.  The only 915 concern is proper cooling for here in SoCal even with an oil cooler.

For the 836, I'm just wondering whether a JMR Stage IV is worth it without lightening/balancing the crank, and if keeping stock studs and rods, since I am not splitting the cases.

In the meantime Don, I was finally able to cut in front of you on this 78 550.
Cheers!

« Last Edit: April 04, 2015, 07:17:34 AM by Blackfin5 »
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Offline SOHC4 Cafe Racer Fan

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Re: Blackfin CB750 F1 BLASTER
« Reply #179 on: April 04, 2015, 09:02:19 AM »
That 78 is beautiful. Great score!

Your 836 will be fine without a cooler as long as you don't camp in gridlock traffic for extended periods. Mine does just fine without a cooler.

I am going to run a Seatrab in my Bionic Mongrel build given the level of investment in the motor.

I think you'll be fine with the Stage III but I would use HD studs and a MLS head gasket.
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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 Blackfin5

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Re: Blackfin CB750 F1 BLASTER
« Reply #180 on: April 04, 2015, 09:07:27 AM »
Do you think there is a downside in swapping out the studs one at a time with the cases still together?

BTW...the cooling concern is with the future 915, not the upcoming 836 although I am planning on a cooler.
« Last Edit: April 04, 2015, 09:09:22 AM by Blackfin5 »
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Offline calj737

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Re: Blackfin CB750 F1 BLASTER
« Reply #181 on: April 04, 2015, 09:14:01 AM »
Also fully expect you to spend obscene amounts of money on ARP hex flange bolts and nuts!

I see no issue with a stud-by-stud replacement. In addition to HD studs, HD nuts  :)
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Blackfin5

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Re: Blackfin CB750 F1 BLASTER
« Reply #182 on: April 04, 2015, 11:39:03 AM »
Just on the 550 I needed to soak bottom stud threads with PB blaster and use torch on the underside/indide of the case to break the studs free.

You advise Cal, and I will follow (to a reasonable extent)!
« Last Edit: April 06, 2015, 08:42:26 AM by Blackfin5 »
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Offline calj737

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Re: Blackfin CB750 F1 BLASTER
« Reply #183 on: April 04, 2015, 01:11:54 PM »
Page 4, halfway down. The hex flange head bolts. Order the nuts too  :D

The site is a bit clumsy for ordering massive quantities, but when its time, I'll give you an Excel file to order from... Maybe

http://www.allensfasteners.com/search_results.asp?txtsearchParamCat=61
« Last Edit: April 04, 2015, 05:30:52 PM by calj737 »
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'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline SOHC4 Cafe Racer Fan

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Re: Blackfin CB750 F1 BLASTER
« Reply #184 on: April 04, 2015, 05:03:49 PM »
That 915 is going to be a beast, Kevin. 

I picked up one of the smaller Setrab oil cooler's from a local dealer in Long Beach.
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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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