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Author Topic: CB750 890cc Engine build [Codename: Rattlesnake]  (Read 66014 times)

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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #125 on: August 08, 2010, 09:06:34 PM »
Quote from: michrobi 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/

Sudco can set up a set for you or so they've told me. I believe it takes the later model larger spigots in the heads to match up?!?! 
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline michrobi

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #126 on: August 20, 2010, 10:15:21 AM »
The rockers are here, just waiting for the transmission and I'm good to begin assembly. If I can't find an alternator cover before I start on the top end, I guess I'll powder the perfect one off my K6  :-\
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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 #127 on: August 20, 2010, 10:37:25 AM »
That's good news. Looking forward to it. We're on the same track. I'm just waiting for some new washers for my crank studs and some o-rings for the bottom of the cylinders. I ordered 66.8mm X 2mm o-rings from a CB900. The original are listed as 61.8mm X 2mm. The pistons are 67mm vs 61mm stock. 66.8mm was the closest to .8mm over the stock piston size I found. Big Jay put the taper back into the bottom of the cylinders so I thought I'd re-oring it. I had reused the original size on my 812 without any leak issues so I thought I'd try it this way. Couldn't use the old corroded rusty washers either that came off it with everything else thats been done so far. With a little luck the bottom end should be buttoned up witin the next week.
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline michrobi

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #128 on: August 27, 2010, 09:24:19 PM »
Well, I'm officially out of excuses. I'll get my garage cleaned up and ready this weekend.







How it looked when I sent it...


How it looks now with 2nd-5th gears undercut...


Man, such excellent work.

 ;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 Sam Green Racing

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #129 on: August 28, 2010, 04:50:35 AM »
Nice, very nice.  8) 8) 8)

Sam. ;)
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Offline tweakin

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #130 on: August 28, 2010, 07:10:30 AM »
Wow, looks great.  Now get that thing built.
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Offline Terry in Australia

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #131 on: August 28, 2010, 05:23:36 PM »
Quote from: Jerry Rxman Griffin on August 08, 2010, 09:06:34 PM
Quote from: michrobi 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/

Sudco can set up a set for you or so they've told me. I believe it takes the later model larger spigots in the heads to match up?!?! 

Here's a couple of pics of my Mikuni 33mm smoothbore carb setup on my 1060 mockup engine Jerry. I looked at the Sudco site but couldn't find the parts to do it, so I sent them to Ken Piper (PO and original builder of my gold bike) and he machined up all new brackets and rods and managed to narrow them down to the point where they'll mount straight on to a CB750 without any special rubbers etc. Cheers, Terry. ;D





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Offline MCRider

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #132 on: August 28, 2010, 05:26:12 PM »
Wow! That's all.  :o
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1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #133 on: August 28, 2010, 05:43:55 PM »
Looks great Terry! That should scream. Now you're going to make me get out the 73.75mm pistons & start the 1080  ;) Not for a while and I'll limit it to the 1000 set up.

We got some serious #$%* going on here boys!

I know Mike Rieck is hiding his stuff and holding out on us  ;D
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Terry in Australia

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #134 on: August 28, 2010, 05:54:30 PM »
Ha ha, yeah thanks guys, it's nice to sit in my chair and look at it, but I must get off my butt and put that engine together, the warm weather is just around the corner! Cheers, Terry. ;D
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline MRieck

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #135 on: August 29, 2010, 04:53:45 PM »
Quote from: Jerry Rxman Griffin on August 28, 2010, 05:43:55 PM
Looks great Terry! That should scream. Now you're going to make me get out the 73.75mm pistons & start the 1080  ;) Not for a while and I'll limit it to the 1000 set up.

We got some serious #$%* going on here boys!

I know Mike Rieck is hiding his stuff and holding out on us  ;D
I'll be building my engine this winter Jerry. The head is going to be special. I'll post post some pics
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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #136 on: August 29, 2010, 05:47:36 PM »
Yeah but... you said mine was special, mine was perfect and I better have a perfect engine to match. Damn CNC heads!  :o  ;)

When are you going to give it up?
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Retro Rocket

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #137 on: August 29, 2010, 05:51:40 PM »
CNC heads..... :o....Tell me more...... ;)

Mick
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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 Jerry Rxman Griffin aka MuthaF'er

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #138 on: August 29, 2010, 07:34:40 PM »
Pure speculation on my part
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Retro Rocket

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #139 on: August 29, 2010, 09:47:12 PM »
Lie to me then...... ;) ;D

Mick
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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 MRieck

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #140 on: August 30, 2010, 01:00:14 AM »
Quote from: retro rocket on August 29, 2010, 05:51:40 PM
CNC heads..... :o....Tell me more...... ;)

Mick
Not yet Mick. That's all I'll say
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Offline Retro Rocket

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #141 on: August 30, 2010, 01:58:45 AM »
Quote from: MRieck on August 30, 2010, 01:00:14 AM
Quote from: retro rocket on August 29, 2010, 05:51:40 PM
CNC heads..... :o....Tell me more...... ;)

Mick
Not yet Mick. That's all I'll say

I don't mind at all taking my time with my builds......good things come to those who wait.... ;)

Mick
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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 mick7504

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #142 on: August 30, 2010, 04:05:46 AM »
Is this a taste of what might be coming?  ;D
http://www.rcsperformanceonline.com/category_s/13.htm
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Offline Retro Rocket

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #143 on: August 30, 2010, 04:42:06 AM »
Quote from: mick7504 on August 30, 2010, 04:05:46 AM
Is this a taste of what might be coming?  ;D
http://www.rcsperformanceonline.com/category_s/13.htm

Nice....I knew you wouldn't be far away Mick..... ;)....Hows that 1100 going mate..

Mick
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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 Terry in Australia

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #144 on: August 30, 2010, 04:54:02 AM »
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline mick7504

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #145 on: August 30, 2010, 05:09:28 AM »
Quote from: retro rocket on August 30, 2010, 04:42:06 AM
Quote from: mick7504 on August 30, 2010, 04:05:46 AM
Is this a taste of what might be coming?  ;D
http://www.rcsperformanceonline.com/category_s/13.htm

Nice....I knew you wouldn't be far away Mick..... ;)....Hows that 1100 going mate..

Mick
Real good mate.
I'm rapped with it.
It handles like a dream and is starting to loosen up a bit now and ate it's first Harley last weekend so I was pleased about that.  ;D
Mick
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Offline Retro Rocket

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #146 on: August 30, 2010, 04:04:11 PM »
Quote from: mick7504 on August 30, 2010, 05:09:28 AM
Quote from: retro rocket on August 30, 2010, 04:42:06 AM
Quote from: mick7504 on August 30, 2010, 04:05:46 AM
Is this a taste of what might be coming?  ;D
http://www.rcsperformanceonline.com/category_s/13.htm

Nice....I knew you wouldn't be far away Mick..... ;)....Hows that 1100 going mate..

Mick
Real good mate.
I'm rapped with it.
It handles like a dream and is starting to loosen up a bit now and ate it's first Harley last weekend so I was pleased about that.  ;D
Mick

Noice..... ;)

Mick
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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 Sam Green Racing

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #147 on: August 30, 2010, 10:16:12 PM »
Quote from: mick7504 on August 30, 2010, 04:05:46 AM
Is this a taste of what might be coming?  ;D
http://www.rcsperformanceonline.com/category_s/13.htm

Laurinburg NC, rings a bell dose that, must put it on the list of places to visit before I get to old. ;D ;D ;D

KEITH ;)

Sam ;)
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C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
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JMR Racing CB750A street ET drag bike

Offline michrobi

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #148 on: September 01, 2010, 12:40:14 PM »
Bench preped for lower end assembly...


Main studs in...


This ones for the ladies...


And he's off!

 :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 Bill/BentON Racing

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #149 on: September 01, 2010, 01:00:11 PM »
Good Luck,have fun with all those goodies! ;D,Bill
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