post #1 of Old 02-23-2014, 07:23 PM Thread Starter
moto450r
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Carter BBD rebuild

Let's see how bad I can jack this up! I'll be taking the carb off tomorrow morning. Getting all setup tonight......

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post #2 of Old 02-23-2014, 07:30 PM
seabass1858
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you laid out your parts just like i laid mine out. it wasnt bad for a 25 year old and im sure youll do better and if you have throttle shaft play just like the saying for smart phones go "we have a post for that"
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post #3 of Old 02-24-2014, 04:27 AM
86cj74.2L
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While its apart its worth drilling out your emulsion tubes to .037.

Do not take the needle assembly apart unless you have to. If its clean just remove the hole thing and set it aside. If you take it apart you will need to verify the gap setting. And if you don't get the springs on correctly a needle may fall off.

There are a lot of tiny passages. Blow them all out with carb cleaner after the Dipping.
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post #4 of Old 02-24-2014, 06:48 AM
Mike Romain
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Make sure you clean the U shaped piece of gas line between the filter and carb. It can hold an amazing amount of crud. You also need 2 wrenches when putting this line back on. One to hold the brass fitting from moving because it is the seat for the float needle. If it shifts when tightening on the gas line. The float level will go off.

Also be sure the base plate has the notches up. These control the manifold vacuum.

I personally set the vacuum piston gap to 42 thou with 50 being full lean and I think it is 25 being full rich. This is for high speed running. I get up to 500 km per tank on both my 86 CJ7 BBD and my 89 YJ renegade BBD.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
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post #5 of Old 02-24-2014, 10:24 AM Thread Starter
moto450r
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Thanks for the input! Here is the victim
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post #6 of Old 02-24-2014, 10:55 AM Thread Starter
moto450r
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I think the little wire spring on the "vacuum piston assembly" is messed up?
They don't show it in the exploded view of the instructions.
When I opened the top the spring was behind the "right" metering rod and the left side of the spring can be seen laying on the metering rod arm.
How should this spring be routed?



You can see how the misplaced spring has allowed the left metering rod (see the shiny at the bottom) to rub in the tube.



Here is another view of the sprung spring


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post #7 of Old 02-24-2014, 11:08 AM
John Strenk
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The left side should be the same as the right side.

I just got sting by this myself only the spring on mine is warped and is always slipping off the needle. When it happens, the needle gets stuck and the engine rpm shoots up to around 3000 RPM.

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post #8 of Old 02-24-2014, 12:16 PM Thread Starter
moto450r
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Quote:
Originally Posted by John Strenk View Post
The left side should be the same as the right side.

I just got sting by this myself only the spring on mine is warped and is always slipping off the needle. When it happens, the needle gets stuck and the engine rpm shoots up to around 3000 RPM.

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I'm hoping I can bend it back into shape. John would you have a picture of what it should look like?

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post #9 of Old 02-24-2014, 12:19 PM Thread Starter
moto450r
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Misaligned gasket...... what's half covered air passages amongst friends??


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post #10 of Old 02-24-2014, 12:21 PM
Balvar24
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Quote:
Originally Posted by moto450r View Post
I think the little wire spring on the "vacuum piston assembly" is messed up?
They don't show it in the exploded view of the instructions.
When I opened the top the spring was behind the "right" metering rod and the left side of the spring can be seen laying on the metering rod arm.
How should this spring be routed?
I spent more time on this than the rest of my entire carb rebuild. You're a smarter man than I for taking pictures.

"Work hard, rock hard, eat hard, sleep hard, grow big, wear glasses if you need 'em."
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post #11 of Old 02-24-2014, 12:24 PM Thread Starter
moto450r
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Crap-oleo in the bowl....


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post #12 of Old 02-24-2014, 12:28 PM Thread Starter
moto450r
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Isn't the choke pull off rod suppose to be adjustable? No wonder my cold weather starts have been rough.


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post #13 of Old 02-24-2014, 12:32 PM Thread Starter
moto450r
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Quote:
Originally Posted by Balvar24 View Post
I spent more time on this than the rest of my entire carb rebuild. You're a smarter man than I for taking pictures.
I don't want to put it back together wrong. Although finding what I'm finding, putting it back together using the tear down as my guide might be a bad idea.

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post #14 of Old 02-24-2014, 12:48 PM Thread Starter
moto450r
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that was easy


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post #15 of Old 02-24-2014, 01:35 PM
86cj74.2L
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With sediment in your fuel bowl make sure the emulsion tubes are clean.

Soak everything not plastic overnight. Then blow all passages clean with carb cleaner.
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