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Author Topic: Weber carb set-up  (Read 64849 times)

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Offline solo 2

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Re: Weber carb set-up
« Reply #25 on: December 11, 2010, 01:25:40 pm »
Where can I find a manifold for webers!!!
You know you've achieved perfection in design, not when you have nothing more to add, but when you have nothing left to take away.

Offline MRieck

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Re: Weber carb set-up
« Reply #26 on: December 11, 2010, 04:00:13 pm »
Hey RR and the rest of you mikuni side draft guy's, here's a website that might be of use to ya !   ;D ;D

   http://www.wolfcreekracing.com/index.php?option=com_content&view=article&id=21&Itemid=30
Nice info. I have worked with the Mikuni's....not the Weber's. CycleX uses the Mikuni RS's which kinda nullifies the deal. Just my OP. Except it doesn't look as cool. ;) ;)
Owner of the "Million Dollar CB"

Offline voxonda

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Re: Weber carb set-up
« Reply #27 on: December 12, 2010, 08:47:49 am »
Quote from: scottly
Here are some pics of my setup. Rob, I have been using them on an 836 motor. If I'm not mistaken, Frank has used them on several different configurations...

Thanks, looking good. Like the way they point outwards. My Dellorto's point straight to the rear.
How do Weber's compare to Dellorto, setting up wise? Suppose they are a bid alike.
Checked out some parts today:
Idle jet: 57
Emulsion tube: 7772.11
Main jet: 148
Air corrector: 210
Choke: 32 m/m
Aux venturi: 7848.3

Any comment is welcome.

Cheers, Rob
Better sorry for failing then for the lack of trying.

Offline scottly

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Re: Weber carb set-up
« Reply #28 on: December 12, 2010, 05:34:34 pm »
Your jets sound to be a bit on the rich side, but this may be due to the larger choke size, and used on a 736 motor? Do your internal parts look like these?
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline voxonda

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Re: Weber carb set-up
« Reply #29 on: December 13, 2010, 10:02:18 am »
Carb's where used on a Harley................ :-[sorry.
But for that price couldn't resist.
Jet arrangement looks the same, even the internals look alike. Not exactly...but close.
Think have to look for parts, like jets and 30 m/m chokes.
Waiting for the insulators, and then have to work out the cable arrangement.
Better sorry for failing then for the lack of trying.

Offline 754

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Re: Weber carb set-up
« Reply #30 on: December 13, 2010, 10:16:42 am »
Harley Weber baseline jetting for small motors 74 & 80 ci, was the same as each carb on the 750 setups.. so you may be good to goo or at least pretty close..
Maker of the WELDLESS 750 Frame Kit
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My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline scottly

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Re: Weber carb set-up
« Reply #31 on: December 13, 2010, 04:42:07 pm »
I have a spare set of 30mm chokes, and would like to try some 32s, just for fun. Would you be interested in a trade, if the Del/Web parts do interchange? (I know the chokes on some Del/Web down-drafts interchange, but they are totally different from the side-drafts)
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline voxonda

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Re: Weber carb set-up
« Reply #32 on: December 14, 2010, 09:05:17 am »
Hey Scottly,

Am interested in that trade if we can make some measurements to make sure they'll fit.
But first you have to show the bike in your avatar in normal size for me to drool over ;D

Cheers, Rob
Better sorry for failing then for the lack of trying.

Offline 754

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Re: Weber carb set-up
« Reply #33 on: December 14, 2010, 09:16:15 am »
  I will try to remove a Dellortto venturi today and compare it to a Weber venturi.... I got a set of Dells on my display motor.
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline voxonda

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Re: Weber carb set-up
« Reply #34 on: December 14, 2010, 09:43:31 am »
That would be great 754, thanks.  :)

Cheers, Rob
Better sorry for failing then for the lack of trying.

Offline scottly

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Re: Weber carb set-up
« Reply #35 on: December 14, 2010, 09:57:13 am »
Thanks Frank!
In the meantime, here are a couple of bigger pics....
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline voxonda

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Re: Weber carb set-up
« Reply #36 on: December 14, 2010, 10:26:35 am »
Thanks scottly,

That's a nice Seeley! These carb's look the bizz!! ;D

Cheers, Rob
Better sorry for failing then for the lack of trying.

Offline voxonda

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Re: Weber carb set-up
« Reply #37 on: December 14, 2010, 02:27:24 pm »
Anyone knows a good, not to expensive, adress for velo stacks for the Dellorto's?
If not have to make them myself but there is already a big pile of work waiting.
Better sorry for failing then for the lack of trying.

Offline solo 2

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Re: Weber carb set-up
« Reply #38 on: December 14, 2010, 04:32:30 pm »
Hey all, I'll ask once again, where can I get a set of these manifolds. Does anybody still carry them or is there a place to keep an eye out for them.
You know you've achieved perfection in design, not when you have nothing more to add, but when you have nothing left to take away.

Offline scottly

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Re: Weber carb set-up
« Reply #39 on: December 14, 2010, 04:47:07 pm »
Hey all, I'll ask once again, where can I get a set of these manifolds. Does anybody still carry them or is there a place to keep an eye out for them.

I've had mine for over 30 years; it was on my bike when I bought it. Try posting an ad in the parts wanted section.
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline scottly

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Re: Weber carb set-up
« Reply #40 on: December 14, 2010, 04:54:34 pm »
Anyone knows a good, not to expensive, adress for velo stacks for the Dellorto's?
If not have to make them myself but there is already a big pile of work waiting.
Can you post a pic of the internal parts like I did? The stacks on Webs slip over the aux, and go into the body. If the Del stacks bolt on flush with the back side, I may know where some are.
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline 754

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Re: Weber carb set-up
« Reply #41 on: December 14, 2010, 09:36:36 pm »
 Manifolds are sometimes on ebay, I got a few on there..

 Dell stacks are diecast, flat on the back but have a bit of flange with 2 holes, diff than the Weber stacks.
 i pulled the bombsight and venturi out of a Dellortto  today. They are different, a bit bigger on diameter, and a lot  longer, they wont switch, as far as I can see.
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline voxonda

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Re: Weber carb set-up
« Reply #42 on: December 14, 2010, 11:18:16 pm »
Anyone knows a good, not to expensive, adress for velo stacks for the Dellorto's?
If not have to make them myself but there is already a big pile of work waiting.
Can you post a pic of the internal parts like I did? The stacks on Webs slip over the aux, and go into the body. If the Del stacks bolt on flush with the back side, I may know where some are.

Will shoot a pic when I get home, so you can see how they look like.
Like Frank says, stacks go flat on back. Thanks Frank for the comparison.

@solo2: try the Lynx company in Oz.

Cheers, Rob
Better sorry for failing then for the lack of trying.

Offline scottly

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Re: Weber carb set-up
« Reply #43 on: December 15, 2010, 09:41:55 am »
I will check with my friend who has some Dell parts. I looked at the chokes he had a few months ago, but they would not fit my Webs. He also had some stacks, but I didn't look any further than to see that they were flat on the back. I'll check to see if he has any jets, also.
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline voxonda

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Re: Weber carb set-up
« Reply #44 on: December 15, 2010, 01:46:16 pm »
Very much appreciated Scottly!

Cheers, Rob
Better sorry for failing then for the lack of trying.

Offline Tintop

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Re: Weber carb set-up
« Reply #45 on: December 15, 2010, 02:25:19 pm »
For those looking for parts for the Mic / Solex side drafts, they were used on the home market Toyota 2TG (1600) twin cam engine.  That engine is still very popular, as it is cheaper to build up than a Lotus TC.  A Google search for 2TG?  Mine for Solo1/2 in a Seven started out with those, but I switched to Weber 40 DCOE's because my engine builder had piles of parts, and experience with them.
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Offline scottly

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Re: Weber carb set-up
« Reply #46 on: December 15, 2010, 04:36:26 pm »
The short stack has an ID of 42.5 mm, while the longer ones have an ID of 45 mm. The center-to-center distance of the mounting holes in the flange is about 65 mm on all three sets. He also had two different styles of chokes: 2 30s in one style, and 4 30s in the other. Also, he had some jets, but was not sure which model Del they fit. Del mains look slightly different than Webs, but may interchange. I will check this tomorrow. edit: Just checked and found the mains aren't interchangeable. The Webs are larger in diameter where they plug into the emulsion tubes.
« Last Edit: December 15, 2010, 05:16:51 pm by scottly »
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline voxonda

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Re: Weber carb set-up
« Reply #47 on: December 16, 2010, 01:53:37 pm »
Stacks have the dimensions I need.Think dia difference is depending on which Aux vent you use.
Am interested in parts he like to sell.

Cheers, Rob 
Better sorry for failing then for the lack of trying.

Offline scottly

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Re: Weber carb set-up
« Reply #48 on: December 16, 2010, 07:37:26 pm »
The short stacks are 1" long (one has some slight damage. Dented and smoothed out some.)
The medium ones are 2 1/4" long.
The long ones are 4" long.
I believe, due to the construction and nickle plate, that these are Web stacks, as Frank mentioned the Dels were die-cast. My friend says the stacks were interchangeable between certain DOWN-DRAFTS; they certainly won't fit on my beloved DCOE side-drafts.
As far as chokes, there are 2-30mm, that may fit your carbs: they are 41.6mm OD, and 34.7mm long.
There are a bunch of main jets, but in pairs of sizes. No four in the same size.
There are four matching idle jets (45), and four matching accel jets, but I don't know if they fit Dels or Webs.
Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline voxonda

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Re: Weber carb set-up
« Reply #49 on: December 19, 2010, 09:17:50 am »
Hey scunny,

Do you happen to have a price for the stacks?

Anyone got suggestions for the cable linkage for the Dell's ?
Most of what I find is for cars and not usable.

Thanks, Rob
Better sorry for failing then for the lack of trying.

 

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