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Author Topic: CB750 890cc Engine build [Codename: Rattlesnake]  (Read 65162 times)

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Offline scottly

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #100 on: July 22, 2010, 10:44:13 PM »
Quote from: Big Jay on July 22, 2010, 10:37:54 PM
Quote from: scottly on July 21, 2010, 10:55:43 PM
Mich, just how much weight was removed from the crank?

Should be about 4 lbs.
Thanks, Jay!
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Offline michrobi

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #101 on: July 23, 2010, 04:57:31 PM »
He did a real nice job. No complaints  8)

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-Mike

'78 CB750F All stock except for the powerplant. Jived it off my Dad in the spring of '94. He had it since 1980 and it's the first bike I ever rode on.

Current project: http://forums.sohc4.net/index.php?topic=67756

How's them SOHC4 patches coming?

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #102 on: July 23, 2010, 11:53:15 PM »
What a pair!

« Last Edit: July 23, 2010, 11:55:05 PM by Jerry Rxman Griffin »
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Offline Ecosse

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #103 on: July 24, 2010, 12:46:01 AM »
folks, those pieces look beautiful!!

how was the "honda" logo masked?

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Offline tweakin

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #104 on: July 24, 2010, 05:30:12 AM »
Cool, I knew he would.  Cheap and fast to.  Know I am wishing I would have powdered my cases rather than paint.  Looks like next winters project.
Quote from: michrobi on July 23, 2010, 04:57:31 PM
He did a real nice job. No complaints  8)


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Offline MRieck

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #105 on: July 24, 2010, 08:15:13 AM »
 Both sets look beautiful. Mike....your oil jets are going out next week.
  Mike
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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #106 on: July 24, 2010, 08:34:01 AM »
Quote from: Ecosse on July 24, 2010, 12:46:01 AM
folks, those pieces look beautiful!!

how was the "honda" logo masked?



With cash I think.  ;D My guy wasn't cheap, but good. He put quite a bit of time ie $$$ into it. The blast media he uses wouldn't properly remove the existing black spray on the case halves &/or maybe the original finish on the side pieces. Rather than use an aggressive media he sent them out and they used some sort of plastic media to protect the integrity of the surface smoothness. That was taping #1. Got them back, taped them off and did a black, taped them & did the silver inlay, taped off the "Honda" (stayed glossy this way) and did a matte clear over everything to flatten the gloss somewhat and protect both the silver and black. As they say, time is money. I've seen $2000 powder jobs this guys does on exotic bicycle frames with multi-color, fading, logos, etc.  

So as to not hijack, PM any questions.
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Offline Sam Green Racing

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #107 on: July 24, 2010, 09:27:26 AM »
Quote from: bwaller on July 22, 2010, 12:27:47 PM
That bit of news should turn his sad face around Mike. It even excited me!  ;D

 :) :) :) :) :) :) :) :) :) I'm coming over to inspect it, see you a week Tuesday Murph.

Sam. ;)
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Offline MRieck

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #108 on: July 24, 2010, 09:37:08 AM »
Quote from: SamCB750A on July 24, 2010, 09:27:26 AM
Quote from: bwaller on July 22, 2010, 12:27:47 PM
That bit of news should turn his sad face around Mike. It even excited me!  ;D

 :) :) :) :) :) :) :) :) :) I'm coming over to inspect it, see you a week Tuesday Murph.

Sam. ;)
The White Knight returns. ;) ;D
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Offline Bill/BentON Racing

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #109 on: July 24, 2010, 03:17:17 PM »
Quote from: MRieck on July 24, 2010, 09:37:08 AM
Quote from: SamCB750A on July 24, 2010, 09:27:26 AM
Quote from: bwaller on July 22, 2010, 12:27:47 PM
That bit of news should turn his sad face around Mike. It even excited me!  ;D

 :) :) :) :) :) :) :) :) :) I'm coming over to inspect it, see you a week Tuesday Murph.

Sam. ;)
The White Knight returns. ;) ;D
The White Knight better come to inspect and WORK........and take plenty of pics and learn to POST them!! ;D ;D,Bill
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Offline MRieck

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #110 on: July 24, 2010, 04:40:17 PM »
Quote from: bellcow54 on July 24, 2010, 03:17:17 PM
Quote from: MRieck on July 24, 2010, 09:37:08 AM
Quote from: SamCB750A on July 24, 2010, 09:27:26 AM
Quote from: bwaller on July 22, 2010, 12:27:47 PM
That bit of news should turn his sad face around Mike. It even excited me!  ;D

 :) :) :) :) :) :) :) :) :) I'm coming over to inspect it, see you a week Tuesday Murph.

Sam. ;)
The White Knight returns. ;) ;D
The White Knight better come to inspect and WORK........and take plenty of pics and learn to POST them!! ;D ;D,Bill
              He'll have PLENTY to do this time around Bill. ::) ;)
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Offline michrobi

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #111 on: July 30, 2010, 07:06:41 PM »
Okay, well I was waffling back and forth on the undercut. Sent the trans off to have it done today. I also ordered the rockers. Now all I need is an alternator cover in decent enough shape to powder and I'll have it all. I'd rather not use the one on the K6 in my bike, anyone got one laying around?
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-Mike

'78 CB750F All stock except for the powerplant. Jived it off my Dad in the spring of '94. He had it since 1980 and it's the first bike I ever rode on.

Current project: http://forums.sohc4.net/index.php?topic=67756

How's them SOHC4 patches coming?

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #112 on: July 30, 2010, 09:10:55 PM »
Right there with you  ;)  At least the wife can't spend it now  ;D
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Offline michrobi

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #113 on: July 31, 2010, 09:33:58 AM »
My brand new custom made hardened Thompson early style rocker shafts are nice.  :)


Here are a few shots of the minor beveling I've done to the cam journals. What do you guys think of that?




« Last Edit: July 31, 2010, 02:40:08 PM by michrobi »
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-Mike

'78 CB750F All stock except for the powerplant. Jived it off my Dad in the spring of '94. He had it since 1980 and it's the first bike I ever rode on.

Current project: http://forums.sohc4.net/index.php?topic=67756

How's them SOHC4 patches coming?

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #114 on: July 31, 2010, 11:37:02 AM »
Very nice. You got me on those! I do have new rocker arms all around though. Details on the shafts other than what we see? Why tungsten, etc?
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Offline michrobi

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #115 on: July 31, 2010, 02:38:54 PM »
Sorry, Thompson, not tungsten. 12mm hardened Thompson shaft is what those are.
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-Mike

'78 CB750F All stock except for the powerplant. Jived it off my Dad in the spring of '94. He had it since 1980 and it's the first bike I ever rode on.

Current project: http://forums.sohc4.net/index.php?topic=67756

How's them SOHC4 patches coming?

xr88honda

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #116 on: August 05, 2010, 09:48:41 PM »
man im very jealous,ive went through a few yamaha yz 250f motors like that,had jesse at williams motowerks do my head work had trans under cut falicon rod welded crank an its just awesome when you finally get to ride it,im planning to go through my 750k k1/k8 hybrid an build something similar,i must ask what carbs an pipes are you running.im thinking about going with cycle x 2-1 manifolds an running 2x32mm keihin fcr carbs from a crf 150,an i will be watching this thread very interesting
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Offline michrobi

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #117 on: August 06, 2010, 09:39:09 AM »
The pipes are Kerker 4 to 1 megaphones I got new last summer. The carbs are Mikuni 29mm smoothbores.

If I can't stop myself, I'll be getting these in January...
http://www.motorcyclecarbs.com/CARBURETOR_KIT_HONDA_CB750_SO_P16632C1819.cfm
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-Mike

'78 CB750F All stock except for the powerplant. Jived it off my Dad in the spring of '94. He had it since 1980 and it's the first bike I ever rode on.

Current project: http://forums.sohc4.net/index.php?topic=67756

How's them SOHC4 patches coming?

Offline MCRider

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #118 on: August 06, 2010, 09:42:43 AM »
Quote from: michrobi on August 06, 2010, 09:39:09 AM
The pipes are Kerker 4 to 1 megaphones I got new last summer. The carbs are Mikuni 29mm smoothbores.

If I can't stop myself, I'll be getting these in January...
http://www.motorcyclecarbs.com/CARBURETOR_KIT_HONDA_CB750_SO_P16632C1819.cfm
The 29s are bring $300 to $400 on ebay. Z1 Enterprises has a red letter offer on their website to buy 29s and parts for 29s outright. But I'm sure they want to get them as cheap as possible. Popular upgrade for 70s era Z1s.
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Offline michrobi

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #119 on: August 06, 2010, 09:55:37 AM »
Yeah I saw that on the Z1 site. Wired George will buy them too, but someone would have to show me the $$ to get mine  ;D
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-Mike

'78 CB750F All stock except for the powerplant. Jived it off my Dad in the spring of '94. He had it since 1980 and it's the first bike I ever rode on.

Current project: http://forums.sohc4.net/index.php?topic=67756

How's them SOHC4 patches coming?

Offline BLUE71TURBO

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #120 on: August 06, 2010, 02:14:49 PM »
Quote from: michrobi on August 06, 2010, 09:39:09 AM
The pipes are Kerker 4 to 1 megaphones I got new last summer. The carbs are Mikuni 29mm smoothbores.

If I can't stop myself, I'll be getting these in January...
http://www.motorcyclecarbs.com/CARBURETOR_KIT_HONDA_CB750_SO_P16632C1819.cfm

  Save your money !  $2,000.00  for carbs !  What a waste.  Your 29 smooth bores will work just fine.  If you feel you need
   larger carbs go with 33 smooth bore carbs. 1/4 the price on ebay.   ;D
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Offline MCRider

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #121 on: August 06, 2010, 02:26:16 PM »
Quote from: michrobi on August 06, 2010, 09:55:37 AM
Yeah I saw that on the Z1 site. Wired George will buy them too, but someone would have to show me the $$ to get mine  ;D
Who's Wired George?
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Offline michrobi

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #122 on: August 06, 2010, 03:26:55 PM »
Can you get the 33s on a CB750? I didn't know there was a plate/manifolds combo that worked.

Wired George:  http://www.wgcarbs.com/ But if you use him, don't ask for a time estimate or expect to see your carbs again for at least 12 months.
« Last Edit: May 18, 2013, 10:29:39 AM by michrobi »
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-Mike

'78 CB750F All stock except for the powerplant. Jived it off my Dad in the spring of '94. He had it since 1980 and it's the first bike I ever rode on.

Current project: http://forums.sohc4.net/index.php?topic=67756

How's them SOHC4 patches coming?

Offline MRieck

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #123 on: August 06, 2010, 07:59:04 PM »
Quote from: BLUE71TURBO on August 06, 2010, 02:14:49 PM
Quote from: michrobi on August 06, 2010, 09:39:09 AM
The pipes are Kerker 4 to 1 megaphones I got new last summer. The carbs are Mikuni 29mm smoothbores.

If I can't stop myself, I'll be getting these in January...
http://www.motorcyclecarbs.com/CARBURETOR_KIT_HONDA_CB750_SO_P16632C1819.cfm

  Save your money !  $2,000.00  for carbs !  What a waste.  Your 29 smooth bores will work just fine.  If you feel you need
   larger carbs go with 33 smooth bore carbs. 1/4 the price on ebay.   ;D
They are worth it....you have never used a set.
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Offline scottly

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #124 on: August 06, 2010, 09:03:28 PM »

Quote from: michrobi on August 06, 2010, 09:39:09 AM
They are worth it....you have never used a set.
Just to play devils advocate, do you have dyno tests with both sets of carbs, on the same motor?
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