Author Topic: VERY Interesting CB750 Finned Aluminum Cylinder Head Cover on feeBay (not mine) (Read 11886 times)

MoTo-BunnY · « **on:** August 12, 2009, 03:31:00 PM »

(I posted this in the "For Sale" section but since the auction has just a couple more days left, I thought I would post it here too since not many folks are seeing it in the other area, in case this is a super rare item, and also I would really like to know the story behind it)

I'm not a CB750 person but I am pretty familiar with them, but I have never seen anything like this before - maybe a one off custom or something? I thought you guys might want to see it and I'm interested to know the origins of it.

(click on below link to view auction)

LOOK! HONDA CB750 FINNED VALVE COVER / CHOPPER / BOBBER

Alan F. · « **Reply #1 on:** August 12, 2009, 06:51:08 PM »

No tach drive eh?

azuredesign · « **Reply #2 on:** August 12, 2009, 06:53:56 PM »

Once you got fins, you don't need no stinkin' tach drive...!

bucky katt · « **Reply #3 on:** August 13, 2009, 04:08:56 AM »

Quote from: Alan F. on August 12, 2009, 06:51:08 PM

No tach drive eh?

good eye

NitroHunter · « **Reply #4 on:** August 13, 2009, 10:24:11 AM »

Any ideas how he did this?
And how come this guy isn't a member?!

paulages · « **Reply #5 on:** August 13, 2009, 10:27:04 AM »

if you're going to go through that much trouble to remake a valve cover, at least make holes to bolt through to the cam towers...

JLeather · « **Reply #6 on:** August 13, 2009, 11:22:37 AM »

The dude's a member on the HondaChopper board. There's a thread there about how he did it. If you search for it, you'll find it was actually pretty interesting. I'm sure you all know that there's no where near enough metal in the valve cover as-cast to machine fins that tall into.

Turbogrimace · « **Reply #7 on:** August 13, 2009, 11:30:44 AM »

Mill the top of the head flat, weld on a plate of aluminum, and then mill fins in it. It looks great. Lot of work in there too.

BLUE71TURBO · « **Reply #8 on:** August 13, 2009, 01:39:36 PM »

FUGLY ! JUST MY OPINION.

NEVER CARED MUCH FOR THE FINNED LOOK.

Sam Green Racing · « **Reply #9 on:** August 13, 2009, 02:18:56 PM »

Quote from: bucky katt on August 13, 2009, 04:08:56 AM

Quote from: Alan F. on August 12, 2009, 06:51:08 PM
No tach drive eh?

good eye

CB750A.

Sam.

Sam Green Racing · « **Reply #10 on:** August 13, 2009, 02:23:15 PM »

Quote from: paulages on August 13, 2009, 10:27:04 AM

if you're going to go through that much trouble to remake a valve cover, at least make holes to bolt through to the cam towers...

Built for show Paul and the fins serve no purpose.

The bike will probably never be ridden hard, will never get hot enough for the fins to do anything so it defo will never need the holding down studs.

Sam.

MoTo-BunnY · « **Reply #11 on:** August 13, 2009, 02:34:38 PM »

Thanks for the info guys - so it's just an 'all show/no go' thing then, eh? *meh*

I was wondering if it was some crazy racing part and thought you all should know about it, if it was., but umm. . . yeah, obviously not

We now go back to our regularly scheduled programming. . . .

BLUE71TURBO · « **Reply #12 on:** August 13, 2009, 02:52:28 PM »

Your post is greatly appreciated !!

By the way, is that a picture of you ? If it is, not to be sexist, looking GOOD !

MoTo-BunnY · « **Reply #13 on:** August 13, 2009, 03:25:33 PM »

Quote from: BLUE71TURBO on August 13, 2009, 02:52:28 PM

Your post is greatly appreciated !! By the way, is that a picture of you ? If it is, not to be sexist, looking GOOD !

]

thank ya. . . just disappointed though that it wasn't a rare Yoshi parts find or something and just 'chopper' stuff. . . lol

*blushes* thanks . . ..naw, it's all good, I try and keep my maintenance up - stay easy on the eyes and all. Just like our bikes, "not bad for an old girl" lol (of course, if you were to actually SAY that to me, ya might get a 1/2" ratchet upside the head, from this pirate wench! (with a bunny on her shoulder instead of a parrot)

surrender thy booty!!!

NitroHunter · « **Reply #14 on:** August 13, 2009, 04:19:27 PM »

Quote

Built for show Paul and the fins serve no purpose.

Ah, but in this case, the show IS the purpose!

nippon · « **Reply #15 on:** August 13, 2009, 04:22:24 PM »

I thought Darth Vader made it.

nippon

BLUE71TURBO · « **Reply #16 on:** August 13, 2009, 04:23:49 PM »

EYE ! EYE ! CAPTAIN ! I'll make sure i don't tread on ye's bunny trail without ye's permission !

PS. I DIG YE'S UNIFORM !!

BLUE71TURBO · « **Reply #17 on:** August 13, 2009, 04:31:23 PM »

While we are on the subject of covers, the biggest mistake i made about 3 years ago was i had the opportunity to buy a clutch cover, points cover, and a cam cover in magnesium ! $ 750.00 for all . Where these used on the factory CR750'S ? What would they be worth now ?

Sam Green Racing · « **Reply #18 on:** August 13, 2009, 05:01:00 PM »

Quote from: BLUE71TURBO on August 13, 2009, 04:31:23 PM

While we are on the subject of covers, the biggest mistake i made about 3 years ago was i had the opportunity to buy a clutch cover, points cover, and a cam cover in magnesium ! $ 750.00 for all . Where these used on the factory CR750'S ? What would they be worth now ?

The Daytona bikes had magnesium crankcases, if the others were mag, I'm not sure.
I managed to get a aluminum copy of the genny case so anyone that could cast magnesium could do the same castings.
I'll be seeing one of the Daytona mechanics next month, if I can remember, I'll ask.

Sam.

MoTo-BunnY · « **Reply #19 on:** August 13, 2009, 05:43:00 PM »

Magnesium constructed things are fascinating. . .such an interesting metal.

The old air-cooled VW cases are magnesium (Type I and early Type II, I think Type III too). Super light and strong. . .just don't let it catch fire! (and if it does - RUN and don't even think of trying to put it out with water. . . LOL)

BLUE71TURBO · « **Reply #20 on:** August 13, 2009, 05:53:38 PM »

The old engine cases were aluminum and magnesium. The transmission cases were all magnesium. And you are right, either one on fire is very, very bright ! Will blind ya ! The fumes can kill ya, and if ya try to throw water on it, blam !!
Burning Magnesium is very dangerous, the only way to put it out is to cut off the oxygen to it. Just like the Magnesium and Phosphorous bombs used in Vietnam .

Sam Green Racing · « **Reply #21 on:** August 13, 2009, 06:00:12 PM »

Yes, it is nasty stuff when it catches alight. Ralph Bryans crashed one of the Daytona Hondas in practice and the photograph is quite spectacular.
I just Gooled "Ralph Bryans 1970 Daytona crash" all that came up was a load of posts from my own Daytona thread at the top of this forum

I was filing some mag a couple of weeks ago and collected the filings to show benly Ben what happened when you put a light to it. It was all to small and only flared for a trilionth of a nano second

Turnings off a lathe are best for a good display.

Sam.

MoTo-BunnY · « **Reply #22 on:** August 13, 2009, 06:01:12 PM »

Quote from: BLUE71TURBO on August 13, 2009, 05:53:38 PM

The old engine cases were aluminum and magnesium. The transmission cases were all magnesium. And you are right, either one on fire is very, very bright ! Will blind ya ! The fumes can kill ya, and if ya try to throw water on it, blam !!
Burning Magnesium is very dangerous, the only way to put it out is to cut off the oxygen to it. Just like the Magnesium and Phosphorous bombs used in Vietnam .

The bug motor cases were all magnesium-I think the heads were aluminum and maybe some other parts. The later bus with the Type IV motor ('Porsche engine" as some folks say) were aluminum, engine and transaxle. Technically the 'transmission' would be a transaxle. . he he he. . . (sorry, had to) . and yeah, the transaxle was magnesium on the bug. I did old VWs for many, many moons. ... traveled all over the country in a '73 Westy and make money sporadically, tuning them up, still to this day.

Also, the sodium filled valves as found on the Porsche 914 were 'fun' if broken. . LOL (same type engine as in later bus but with some differences like the valves) sodium go *BOOM* (big flare up - also DON'T TRY TO PUT OUT WITH WATER!)

MoTo-BunnY · « **Reply #23 on:** August 13, 2009, 06:03:48 PM »

Quote from: SamCB750A on August 13, 2009, 06:00:12 PM

Yes, it is nasty stuff when it catches alight. Ralph Bryans crashed one of the Daytona Hondas in practice and the photograph is quite spectacular.
I just Gooled "Ralph Bryans 1970 Daytona crash" all that came up was a load of posts from my own Daytona thread at the top of this forum
I was filing some mag a couple of weeks ago and collected the filings to show benly Ben what happened when you put a light to it. It was all to small and only flared for a trilionth of a nano second Turnings off a lathe are best for a good display.

Sam.

OH yeah. . . . aluminum powder is "fun" too. . .

My dad had a kinda weird friend always bugging him for any aluminum powder/shavings, as he would make his own fireworks. Illegal as he77 I'm sure but he was always the life of the party at the July 4th party, out in the country! BoooooOOOOOOM!!!!

Sam Green Racing · « **Reply #24 on:** August 13, 2009, 06:05:11 PM »

Are you sure you are a 29 year old girl or have you been reincarnated with a very good memory.

Sam.

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Author Topic: VERY Interesting CB750 Finned Aluminum Cylinder Head Cover on feeBay (not mine) (Read 11886 times)