« previous next »
Pages: [1] 2  All   Go Down

Author Topic: Yet another CB750 racer.  (Read 5314 times)

0 Members and 1 Guest are viewing this topic.

Offline greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Yet another CB750 racer.
« on: October 18, 2016, 06:49:11 AM »
Finally got around to finishing up a bike for me.  1970 CB750.  Motor is bored out to an 836 using some vintage Venolia/RC engineering pistons, new rings, and some cyclex mls gaskets.  New dynoman valve springs, guides.  Cylinder had some porting done by RC Engineering in 1974 (documented).  Serti valve job.  The crank had been micropolished and balanced, and had the alternator rotor lightened by RC Engineering - also back in '74.    Swingarm is one of Chris Redfern's (MotoGP werks) as well as the stainless pipes.  Brake is a buffalo 4LS with new linings and pads.  Oil tank came from Old Scrambler.  Tank is aluminum and believed to have come from India.  Had most of the parts on my shelves for years.  Don't worry K0 resto guys - it was just a motor, frame (that was already cut), and a box of leftovers. 







« Last Edit: November 08, 2016, 06:41:41 AM by greenjeans »
Logged
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline SOHC4 Cafe Racer Fan

  • Speak up, Whipper-Snapper! I'm a
  • Really Old Timer ...
  • *******
  • Posts: 15,731
  • SOHC/4 Member #1235
Re: Yet another CB750 racer. Won a people's choice?
« Reply #1 on: October 18, 2016, 09:10:51 AM »
Quote from: greenjeans on October 18, 2016, 06:49:11 AM
Finally got around to finishing up a bike for me.  1970 CB750.  Motor is bored out to an 836 using some vintage Venolia/RC engineering pistons, new rings, and some cyclex mls gaskets.  New dynoman valve springs, guides.  Cylinder had some porting done by RC Engineering in 1974 (documented).  Serti valve job.  The crank had been micropolished and balanced, and had the alternator rotor lightened by RC Engineering - also back in '74.    Swingarm is one of Chris Redfern's (MotoGP werks) as well as the stainless pipes.  Brake is a buffalo 4LS with new linings and pads.  Oil tank came from Old Scrambler.  Tank is aluminum and believed to have come from India.  Had most of the parts on my shelves for years.  Don't worry K0 resto guys - it was just a motor, frame (that was already cut), and a box of leftovers.

Very nice bike!!  A little old and a little new (but period correct).  Just curious as to why you went with the twin-leading shoe front brake instead of rotors.
Logged
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 greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: Yet another CB750 racer. Won a people's choice?
« Reply #2 on: October 18, 2016, 09:20:54 AM »
I've had that brake on the shelf for a while now.   Just couldn't bring myself to sell it.  So... to answer your question, I just think it looks cool.  That's it.
Stops as good as a stock disc with the new pads and linings.   Ultimately, I'll change to a dual disc.  I was looking for some different period-era calipers to use - just got too expensive at this point.  I'll rustle some up eventually.
« Last Edit: October 18, 2016, 09:24:18 AM by greenjeans »
Logged
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline seanbarney41

  • not really that much younger than an
  • Really Old Timer ...
  • *******
  • Posts: 10,821
Re: Yet another CB750 racer. Won a people's choice?
« Reply #3 on: October 18, 2016, 09:35:59 AM »
I like it.  Add a front fender and some rearsets and you got one hell of a bike.
Logged
If it works good, it looks good...

Offline kmb69

  • Master
  • *****
  • Posts: 2,041
Re: Yet another CB750 racer. Won a people's choice?
« Reply #4 on: October 18, 2016, 09:39:37 AM »
Quote from: greenjeans on October 18, 2016, 09:20:54 AM
I've had that brake on the shelf for a while now.   Just couldn't bring myself to sell it.....

Hoarding parts, huh?  :o  ;)  8)

Very, very nice progress, John.
Logged

Offline SOHC4 Cafe Racer Fan

  • Speak up, Whipper-Snapper! I'm a
  • Really Old Timer ...
  • *******
  • Posts: 15,731
  • SOHC/4 Member #1235
Re: Yet another CB750 racer. Won a people's choice?
« Reply #5 on: October 18, 2016, 09:43:56 AM »
Quote from: greenjeans on October 18, 2016, 09:20:54 AM
I've had that brake on the shelf for a while now.   Just couldn't bring myself to sell it.  So... to answer your question, I just think it looks cool.  That's it.
Stops as good as a stock disc with the new pads and linings.   Ultimately, I'll change to a dual disc.  I was looking for some different period-era calipers to use - just got too expensive at this point.  I'll rustle some up eventually.

I think it's cool, too.  I bet it has at least as much stopping power as the stock disc.
Logged
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 CBGhia

  • Expert
  • ****
  • Posts: 1,347
Re: Yet another CB750 racer. Won a people's choice?
« Reply #6 on: October 18, 2016, 11:03:26 AM »
I wasn't able to get up to the show.  I heard it was great.  I saw the pictures online and I knew it had to be you.  Good job!
Logged
CB550 Cafe, GL1000, Buell Ulysses
Quote from: dave500 on February 14, 2014, 03:53:33 AM
if you dont trial spin the camshaft in the head and cover you are a novice,with no natural mechanical appitude,destined for destruction.
"The cleaner the dipstick, the closer to God." -Rev. Horton Heat
“Faster, Faster, until the thrill of speed overcomes the fear of death.”  - Hunter S. Thompson

Offline SOHC4 Cafe Racer Fan

  • Speak up, Whipper-Snapper! I'm a
  • Really Old Timer ...
  • *******
  • Posts: 15,731
  • SOHC/4 Member #1235
Re: Yet another CB750 racer. Won a people's choice?
« Reply #7 on: October 18, 2016, 11:29:45 AM »
I just noticed the wheels.  They look like the shouldered Excel wheels or Akronts but you've painted or powdercoated the inside of the rim black.  Nice custom touch.

What is the story with the tail? Is it aluminum, steel or fiberglass? Custom?
Logged
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 greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: Yet another CB750 racer. Won a people's choice?
« Reply #8 on: October 18, 2016, 12:04:33 PM »
Quote from: CB750 Cafe Racer Fan on October 18, 2016, 11:29:45 AM
I just noticed the wheels.  They look like the shouldered Excel wheels or Akronts but you've painted or powdercoated the inside of the rim black.  Nice custom touch.

What is the story with the tail? Is it aluminum, steel or fiberglass? Custom?

Tail piece is off a Kawasaki KZ750B.   I took a section out of the middle and some off the bottom edges as well.  Always liked the little lip they have.

Shouldered aluminum.   Yep, I painted the centers.  They'll get a pin stripe as well.
Logged
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: Yet another CB750 racer. Won a people's choice?
« Reply #9 on: October 18, 2016, 12:07:55 PM »
Quote from: seanbarney41 on October 18, 2016, 09:35:59 AM
I like it.  Add a front fender and some rearsets and you got one hell of a bike.

I just can't do full on rearsets.  I'm too tall and my feet get in the way.
The foot pegs are actually moved back 4" from stock and up about 3/4"   -  More for my riding tastes and big feet.  Just had to shorten the brake lever and the shifter.
Still contemplating a fender.  I have a Tarozzi fork brace on there that I really like.  Still, I'd like a fender incase I get stuck in an unexpected downpour.  As it currently sits, it's more for show and sunny day riding.
« Last Edit: October 18, 2016, 12:18:27 PM by greenjeans »
Logged
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline Jerry Rxman Griffin aka MuthaF'er

  • This MuthaF'er is getting to be a
  • Really Old Timer ...
  • *******
  • Posts: 14,910
  • Bought her new 4/75
Re: Yet another CB750 racer. Won a people's choice?
« Reply #10 on: October 18, 2016, 12:47:34 PM »
 ;D ;)
Logged
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Swoop

  • Enthusiast
  • **
  • Posts: 250
Re: Yet another CB750 racer. Won a people's choice?
« Reply #11 on: October 18, 2016, 01:02:14 PM »
Very sharp looking bike....clean. I like the Hondasaki look of it. Especially the seat/tailpiece. You might not want to go too fast till you make sure that the angle of the rear spokes are not going to be an issue.
Logged

Offline Bootsey

  • Hot Shot
  • ***
  • Posts: 383
Re: Yet another CB750 racer. Won a people's choice?
« Reply #12 on: October 18, 2016, 01:48:44 PM »
That's one nice bike, awesome work!
Logged

Offline bill440cars

  • Feeling More & More,
  • Really Old Timer ...
  • *******
  • Posts: 12,358
  • Tryin' To Slow Down "Time"!
Re: Yet another CB750 racer. Won a people's choice?
« Reply #13 on: October 18, 2016, 02:15:30 PM »


I agree, Very nice build, at that. Yeah, bout the only 2 things I'd change, would be to add a front fender and change ownership (to Me)
Logged
Member # 1969
PRAYERS ALWAYS FOR: Bre, Jeff & Virginia, Bear, Trevor & Brianna ( Close Friend's Daughter)
"Because HE lives, I can Face Tomorrow"                  
 You CAN Teach An Old Dog New Tricks, Just Takes A Little Bit Longer & A Lot More Patience!! 
             
Main Rides: '02 Durango, '71 Swinger & Dad's '93
                  Dakota LE 4x4 '66 CB77 & '72 SL350K2
Watch What You Step Into, It Could  End Up A Mess!

Offline hashvm

  • Full Member
  • *
  • Posts: 83
  • It's not a lesson without you making mistakes!
Re: Yet another CB750 racer. Won a people's choice?
« Reply #14 on: October 18, 2016, 03:30:22 PM »
That's a really good looking bike, good job!
Logged

Offline Retro Rocket

  • Eggs are hard due too a
  • Really Old Timer ...
  • *******
  • Posts: 19,279
  • ROCK & ROLL
Re: Yet another CB750 racer. Won a people's choice?
« Reply #15 on: October 18, 2016, 05:05:54 PM »
Bike turned out great John, you ended up with a good balance, something lacking in many racer/cafe racer builds. I would incorporate some kind of fenders to keep the muck of the vital bits... ;D  Oh, and its Chris Redpath mate... :P
Logged
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 greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: Yet another CB750 racer. Won a people's choice?
« Reply #16 on: October 18, 2016, 05:56:58 PM »
Apologies to Chris Redpath - got a buddy at work (Redfern)
Thanks fellas.  I thought long and hard about doing another cafe bike. 
Logged
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline BPellerine

  • Master
  • *****
  • Posts: 2,222
Re: Yet another CB750 racer. Won a people's choice?
« Reply #17 on: October 18, 2016, 06:31:18 PM »
nice bike,is that the engine that had the 315 cam in it?bill
Logged
1978 CB 750K ard and webers
another anfob

Offline greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: Yet another CB750 racer. Won a people's choice?
« Reply #18 on: October 19, 2016, 06:07:55 AM »
Yep.  Has a stocker 69 in it now.   
Logged
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline turkey4me

  • Enthusiast
  • **
  • Posts: 237
  • The closer you are the less you can see!
Re: Yet another CB750 racer. Won a people's choice?
« Reply #19 on: October 20, 2016, 05:52:10 AM »
Freaking cool bike.  Great choice of colors and seat design.  Bet you're happy with the handlebars.  A short black fender with matching pin stripes would look sweet.  Did you put rear turn signals in the frame or just black inserts where it was cut?
Logged

Offline greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: Yet another CB750 racer. Won a people's choice?
« Reply #20 on: October 20, 2016, 09:40:32 AM »
thanks, turkey.  Yep, I will be putting turn signals in the frame rails - I have plugs in there now, all my wiring is in place.   I'll fab up a fender for the front, just had a hard deadline and this was as far as i could get with the time I had.  I haven't even got to ride it yet, but I've done another with the same set-up and really like it.  I'm more of a mountain bike BMX guy so I like my feet under me. Hope to add some sort of front windscreen as well.   Stay tuned
Logged
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 34,300
  • Central Texas
Re: Yet another CB750 racer. Won a people's choice?
« Reply #21 on: October 20, 2016, 03:55:38 PM »
Great job GJ.  Thought that tailpiece looked familiar, I like it.

Logged
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline Old Scrambler

  • My CB750K3 has been in 39 States & 5 Provinces
  • Old Timer
  • ******
  • Posts: 3,808
Re: Yet another CB750 racer. Won a people's choice?
« Reply #22 on: October 24, 2016, 12:28:20 PM »
Good Looking Custom............with a few pedigree parts ;)

John........Thanks for the plug about the oil tank :) :)
Logged
Dennis in Wisconsin
'64 Triumph Cub & '74 Honda CB750 Bonneville Salt Flats AMA Record Holder (6)
CB750 Classic Bonneville Racer thread - http://forums.sohc4.net/index.php/topic,135473.0.html
'63 CL72 Project(s)
'66 CL77 Red
'67 Triumph T100C
'73 750K3 Owned since New
'77 750F2 Cafe Project
2020 ROYAL ENFIELD Himalayan

Offline greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: Yet another CB750 racer. Won a people's choice?
« Reply #23 on: November 08, 2016, 06:41:24 AM »
My buddy James Trawick shot this one

Logged
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline Darren Jakal

  • Hot Shot
  • ***
  • Posts: 395
Re: Yet another CB750 racer.
« Reply #24 on: November 08, 2016, 09:02:49 AM »
That is a great looking bike! Nice picture.
Logged
Pages: [1] 2  All   Go Up
« previous next »