Author Topic: CB750 890cc Engine build [Codename: Rattlesnake]  (Read 65026 times)

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Offline MCRider

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #75 on: July 11, 2010, 05:48:29 AM »
Looks great!

I picked up my engine pieces from the coater last week. Fantastic! We discussed coating the cylinders and head. Definitely no on Mike's expensive head. Then we turned to the cylinders. Not as expensive BUT after discussing the "at home" BBQ grill method of removing the liners and the need to bake the cylinders at 380 degrees to sweat out oils, etc then bake the coat at 380 degrees we decided not to coat the cylinders. My guy is good but.... we left nothing to chance. 

Just something I thought I'd throw in. If you do it and all is well I'll be pissed I didn't go ahead  ;)


Do you hear the swooshing sound?  That's the sound of power going out the window!

Hope you rethink that move....

~Joe

Not coating the head shouldn't affect HP.  ;)
Ride Safe:
Ron
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."

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #76 on: July 11, 2010, 08:21:47 AM »
...guess I missed that part.

Just hate to see guys put money and effort into a motor, and not touch the head......you leave ALOT of power on the table when you do that.

~Joe

Offline MCRider

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #77 on: July 11, 2010, 11:31:16 AM »
...guess I missed that part.

Just hate to see guys put money and effort into a motor, and not touch the head......you leave ALOT of power on the table when you do that.

~Joe

Yup. Headfirst in my book.
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Ron
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 #78 on: July 11, 2010, 08:23:50 PM »
Yep, I have THE head and it will be put to good use. Just won't be powder coated.

Michrobi,

There just isn't enough time when we get this close  ;) I was all ready to prep clean the engine parts, inventory my seals and gaskets, mic the bearings, install the lower studs after chasing the holes and GET AT IT until the phone rang and one of the agencies I signed on with asked me to work 8 more days this month. Money talks. Spare time is scarce once again. I'll be watching you.
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 #79 on: July 14, 2010, 04:20:05 PM »
What, you checkin' out my 34mm intake valves?

AHhahahaha!

Bam!











Pow!
-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 #80 on: July 14, 2010, 05:01:00 PM »
Purdy!
Ride Safe:
Ron
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 #81 on: July 14, 2010, 09:45:09 PM »
And those narrow light weight titanium retainers and those narrow light weight stronger valve springs! Hell yeah!
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 #82 on: July 15, 2010, 04:57:48 PM »
Jesus man, the difference between a stage 3 port and the Cobra head's port is extreme!

Here is the Cobra 1000cc intake throat


And here is the Rattlesnake 890cc intake throat.


These photos are really poor and the difference is still so obvious. I wish you guys could stop by and put your eyeballs on it, it's like night and day. I need to avoid elevators for 11 days so I don't get any sexual harassment suits.

Here is the Cobra crank next to the Rattlesnake crank. Of course the Goldenrods are gone. They're somewhere in Germany hopefully being put to good use. Much more machining and at a much greater depth on the Rattlesnake's crank. No fluting, but the benefits of a flute on the mains is arguable.
-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 Doctor_D

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #83 on: July 15, 2010, 08:59:06 PM »
Hmmm... your 890, my 836...

I wonder if Seattle's big enough for the both of us?

 ;D
Take care,
David
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1978 CX500
1971 Norton Commando

Offline tweakin

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #84 on: July 16, 2010, 05:32:56 AM »
DAMN!!!  That thing is going to be a beast.

Offline michrobi

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #85 on: July 16, 2010, 08:40:06 AM »
Right?   :D
-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 #86 on: July 16, 2010, 08:44:50 AM »
Mike sure doesn't like to leave much aluminum  ;)
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline MRieck

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #87 on: July 16, 2010, 09:27:47 AM »
Mike sure doesn't like to leave much aluminum  ;)
That's why I have to epoxy the spigots Jerry. ;)
Owner of the "Million Dollar CB"

Offline Sam Green Racing

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #88 on: July 16, 2010, 12:17:21 PM »
Dose it hurt having epoxy in your spigots ::)

Sam. ;)
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Offline MRieck

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #89 on: July 16, 2010, 12:18:31 PM »
Dose it hurt having epoxy in your spigots ::)

Sam. ;)
Only if it's done incorrectly Sam. ;) ::) ;D
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Offline Bill/BentON Racing

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #90 on: July 16, 2010, 06:18:34 PM »
If I had a CRANK like Rattlesnakes and RODS,I'd have to stay out of elevators also,talk about pitching a tent.You da man.Nice work ,Good luck! ;D,Bill
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Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
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1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
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Offline michrobi

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #91 on: July 21, 2010, 04:11:41 PM »
Jeff and Rainier has the cases. Man, I actually talked to that guy back in March when I was shopping for media blasters to clean the cases and the block. He insisted on using steel media to blast them so I took them somewhere else. I didn't get a good vibe then, but when I talked to him yesterday about the coating he seemed confident and on the same page.

If he eff's them up I'm coming down to Tacoma to cry about it.   ;D
-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 tweakin

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #92 on: July 21, 2010, 04:39:31 PM »
i am anxious to see how the cases turn out.  I was a little scetched on having the cases done, but someone has to be the guinie pig, lol. ;D  I am sure Jeff will do an excellent job on the cases.

Jeff and Rainier has the cases. Man, I actually talked to that guy back in March when I was shopping for media blasters to clean the cases and the block. He insisted on using steel media to blast them so I took them somewhere else. I didn't get a good vibe then, but when I talked to him yesterday about the coating he seemed confident and on the same page.

If he eff's them up I'm coming down to Tacoma to cry about it.   ;D

Offline MRieck

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #93 on: July 21, 2010, 08:38:22 PM »
 They don't have to be immaculate. I just sprayed Sam's cases....the biggest pieces of S I've seen. Nothing easy sometimes.
Owner of the "Million Dollar CB"

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #94 on: July 21, 2010, 10:18:01 PM »
The guy that did mine had them blasted with a plastic media. Said it wouldn't affect the surface appearance.
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline scottly

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #95 on: July 21, 2010, 10:55:43 PM »
Mich, just how much weight was removed from the crank?
Don't fix it if it ain't broke!
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Offline Sam Green Racing

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #96 on: July 22, 2010, 01:01:02 AM »
They don't have to be immaculate. I just sprayed Sam's cases....the biggest pieces of S I've seen. Nothing easy sometimes.

 :'( :'( :'( :'( :'( :'( :'(

Sam. ;)
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Offline MRieck

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #97 on: July 22, 2010, 12:16:32 PM »
They don't have to be immaculate. I just sprayed Sam's cases....the biggest pieces of S I've seen. Nothing easy sometimes.

 :'( :'( :'( :'( :'( :'( :'(

Sam. ;)
Don't be sad Sammy...they are beautiful now. So is the 5mm head I just returned home with. And the Earl's cooler that arrived today etc etc. ;)
Owner of the "Million Dollar CB"

Offline bwaller

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #98 on: July 22, 2010, 12:27:47 PM »
That bit of news should turn his sad face around Mike. It even excited me!  ;D

Offline Big Jay

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Re: CB750 890cc Engine build [Codename: Rattlesnake]
« Reply #99 on: July 22, 2010, 10:37:54 PM »
Mich, just how much weight was removed from the crank?

Should be about 4 lbs.