Author Topic: Weber carb set-up (Read 151726 times)

Quote from: bear on November 25, 2018, 03:17:48 PM
I have a spare I think.
Where are you England?

Cheers,
Brian

Bedford, just North of London.

Quote from: Medyo Bastos on November 25, 2018, 03:28:57 PM
I’ve got one under my bed.

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Who doesn't?

Well me....

Let me know if I need to dig it out

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scottly · « **Reply #831 on:** November 25, 2018, 08:09:30 PM »

For what it's worth, the two-piece MPD manifolds are the easiest to fit, while the RC style manifolds are the most difficult.

Tintop · « **Reply #832 on:** November 26, 2018, 05:03:37 AM »

Lynx in Australia still lists a Weber manifold for the Honda 750, also a complete kit with 40 DCOE's.

https://www.lynxauto.com.au/honda-motorcycle-cb-750-2-x-weber-dcoe-manifold.html

Martin (1975CB750F) · « **Reply #833 on:** November 26, 2018, 04:54:51 PM »

Hi Scottly,

I am looking for a weldless frame kit for my 1975 CB750F. Do you still make them?

Thanks,
Martin

scottly · « **Reply #834 on:** November 26, 2018, 07:18:17 PM »

Hello Martin. Yes, I have frame kits ready to be shipped, but this is not the proper place to discuss them.

Make some more posts so we can exchange private messages; you need 5. The introduction page is a good place to start.
Scott

Don R · « **Reply #835 on:** November 29, 2018, 12:50:30 PM »

I'll be annoying you guys with questions, I'm getting a set of Webers from Bill Benton. I'll read the entire thread before I ask something that's been covered.

Jerry Rxman Griffin aka MuthaF'er · « **Reply #836 on:** November 29, 2018, 02:14:51 PM »

Good deal Don. At least I won't have to ask now!

Don R · « **Reply #837 on:** November 29, 2018, 02:30:52 PM »

If I can't make them work, I can bolt them to the engine that I can't make run! Perfect!

Jerry Rxman Griffin aka MuthaF'er · « **Reply #838 on:** November 29, 2018, 03:21:20 PM »

LOL. I tried ordering a set of K7/K8 carb boots from CruzinImage for $50. They "shipped" but never arrived after a month. He refunded my money then shut me off. I had a buddy order a set then and the same happened. I ended up getting a set from CB750Supply for $100. They showed up a week before I left for the island so I haven't tried fitting them yet. The extra 1mm of carb opening for the K7/K8 PD carbs is helpful for the larger Webers. I'm back in the States during December but I'm working 12 of those cold Colorado days so I probably won't get to try until April. You are the guinea pig

Don R · « **Reply #839 on:** November 29, 2018, 08:45:53 PM »

Drag racing got me enough autometer contingency to get a wide band O2 sensor. It would require a weld bung in the collector and a long enough tailpipe/muffler to keep fresh air from sucking back into the pipe. I can weld it with stainless rod to minimize the damage to the chrome. That might be as good as a trip to the dyno.

scottly · « **Reply #840 on:** November 29, 2018, 08:53:23 PM »

There has already been a bit of dyno work done, Don.

Which manifold did you get?

Don R · « **Reply #841 on:** November 29, 2018, 09:15:52 PM »

Bill said it's an RC cobra type. It appears to have angled carb connections. I think they have changed hands a couple times around here. Not sure if anyone got them running or not.

Don R · « **Reply #842 on:** November 29, 2018, 09:18:30 PM »

Quote from: RAZZ on April 21, 2017, 03:04:52 AM

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I snagged this pic belonging to Razz off this thread. They look pretty much like these except with a breadbox style filter box and foam filter media inside.

Don R · « **Reply #843 on:** November 29, 2018, 09:23:07 PM »

https://www.facebook.com/photo.php?fbid=10217818285273511&set=p.10217818285273511&type=3

https://www.facebook.com/photo.php?fbid=10217818286633545&set=p.10217818286633545&type=3

scottly · « **Reply #844 on:** November 29, 2018, 09:37:59 PM »

That looks like a one-piece MPD manifold. I have a spare set of Frank's soft silicone manifold-to-spigot hoses.

754 · « **Reply #845 on:** November 29, 2018, 09:48:05 PM »

Mine is a one piece that has been cut, easier to install but moves around. I should convert it to proper 2 pce.. welding required. Weber pic of the day..

Don R · « **Reply #846 on:** November 29, 2018, 10:09:41 PM »

Thanks Frank, that pic is enlightening.

754 · « **Reply #847 on:** November 29, 2018, 10:31:11 PM »

You have a good manifold, i am not so sure you can easily change jets with the RC bolted in place.
On yours with MPD, you can easily pull the wing nut cover off. Then pull the long jet assembly. Its 3 parts. The main part is the emulsion tube, then on top and bottom are, I think the main and the air correction or low speed jet. They slip in and out.
When you pull the long part out using a flat blade screwdriver, you do not need to drain gas. You can change jets in about 4 minutes..
Not the ball bearings on the throttle shaft, and the changeable venture tube in the left bore.

754 · « **Reply #848 on:** November 29, 2018, 10:36:14 PM »

Actually Razz,s manifold is straight.. hmm
MPD are splayed outward, making jet access easier..

Don R · « **Reply #849 on:** November 29, 2018, 10:57:45 PM »

I'll know more soon, I read up to page 16 so far. One of the pics bill sent was silicone hose connectors. They have 30's and a single cable pull. I'm hoping the bodies clean up well. I asked Santa for Weber books for Christmas.

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Author Topic: Weber carb set-up (Read 151726 times)