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Freeing Up Carbs on '66 Superhawk

Fuel System: Gas (Petrol) tanks, Carburators
DerekSuperhawk305
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Freeing Up Carbs on '66 Superhawk

Post by DerekSuperhawk305 » Wed May 02, 2018 11:30 am

.
What have you guys done and used to free up stuck carbs?
Thx,
Derek

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G-Man
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Re: Freeing Up Carbs on '66 Superhawk

Post by G-Man » Wed May 02, 2018 2:26 pm

I put them in my ultrasonic cleaner which has a built-in heater.

The heat and the cleaning effect usually frees up stick slides and help get the carb apart. Once it's apart it goes in again for proper cleaning of all the parts.

G
DerekSuperhawk305 wrote:.
What have you guys done and used to free up stuck carbs?
Thx,
Derek
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

DerekSuperhawk305
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Posts: 31
Joined: Mon Apr 09, 2018 2:54 pm
Location: Cambridge, Ontario, Canada

Re: Freeing Up Carbs on '66 Superhawk

Post by DerekSuperhawk305 » Wed May 02, 2018 3:09 pm

G-Man wrote:I put them in my ultrasonic cleaner which has a built-in heater.

The heat and the cleaning effect usually frees up stick slides and help get the carb apart. Once it's apart it goes in again for proper cleaning of all the parts.

G
Thanks for the reply...I have thought about getting one of those but, for now I may have to resort to just soaking them...I'm thinking some pure lemon juice or a bit of diesel.

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G-Man
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Re: Freeing Up Carbs on '66 Superhawk

Post by G-Man » Wed May 02, 2018 3:37 pm

Heat is probably the most effective thing as it expands the carb body, reducing its grip on the brass slide.

A hot air gun or a pan of boiling water will do it.

G
DerekSuperhawk305 wrote:
G-Man wrote:I put them in my ultrasonic cleaner which has a built-in heater.

The heat and the cleaning effect usually frees up stick slides and help get the carb apart. Once it's apart it goes in again for proper cleaning of all the parts.

G
Thanks for the reply...I have thought about getting one of those but, for now I may have to resort to just soaking them...I'm thinking some pure lemon juice or a bit of diesel.
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

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Seadog
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Post by Seadog » Wed May 02, 2018 3:48 pm

Lemon juice is too acidic for aluminum. Don’t do it. It will discolor it. This topic was just discussed last week and someone recommended a heat gun. That solved the poster’s problem. I soak mine in lacquer thinner or use a heated ultrasonic cleaner. G-man’s boiling remedy should work just fine too.

Merz64cb77
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Carbs

Post by Merz64cb77 » Wed May 02, 2018 5:27 pm

What about soaking them in ATF and acetone? I did that with the stuck pistons and it seem to do the trick although it took a long time.
67' CB77
66’ CB77
65’ bomber
68’ hellcat

Merz64cb77
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Carbs

Post by Merz64cb77 » Wed May 02, 2018 5:30 pm

What about soaking them in ATF and acetone? I did that with the stuck pistons and it seem to do the trick although it took a long time.
67' CB77
66’ CB77
65’ bomber
68’ hellcat

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