Author Topic: Carb cleaning experimentation  (Read 1191 times)

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Offline Derby City

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Carb cleaning experimentation
« on: August 06, 2018, 05:00:14 PM »

Has anyone here tried submersing their carbs in Evapo-rust to aid in the cleaning?  I have 3.5 gallons of Evapo-rust and a set of dirty carbs that have been sitting for 7+ years.  Hoping one of you have already tried this and would be willing to share your results.

Thank you! 
1974 CB 550

Offline ekpent

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Re: Carb cleaning experimentation
« Reply #1 on: August 06, 2018, 05:03:26 PM »
 I would not do it personally but maybe somebody else has. I would be worried about a bad chemical reaction with the pot metal they use on those. There is this stuff in a big metal can called carburetor cleaner that seems to work real well  :D

Offline Derby City

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Re: Carb cleaning experimentation
« Reply #2 on: August 06, 2018, 05:05:51 PM »
Tried and tested carb cleaner????  Where's your sense of adventure ;D
1974 CB 550

Offline eigenvector

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Re: Carb cleaning experimentation
« Reply #3 on: August 06, 2018, 05:09:45 PM »
Not really necessary to experiment.

30 minutes in a heated ultrasonic cleaner will get them as clean as they're gonna get.

Just finished a spare set for my 550K.
Rob
--------------------------------
2018 HD Softail Heritage
1979 CB750K Limited Edition
1977 CB550K
1984 CB700SC Nighthawk
1983 VF750S Sabre

Offline madmtnmotors

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Re: Carb cleaning experimentation
« Reply #4 on: August 06, 2018, 06:46:04 PM »
Evapo-Rust will remove any rust on the plated pieces, but won't do diddly for the varnished gas or other gunk in the passages. Net-net, probably a waste of time from a "cleaning perspective". Ultrasonic cleaning is by far the best "no touch" method.

+1

Results with ultrasonic cleaner with simple green:

Before (yuck):



After (suhweet):




30 minutes max with simple green. After that the parts start to darken.  8)
TAMTF...


Wilbur



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Offline seanbarney41

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Re: Carb cleaning experimentation
« Reply #5 on: August 06, 2018, 07:02:26 PM »
or use gunk carb cleaner, done in 5 minutes, no darkening...
If it works good, it looks good...

Online dave500

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Re: Carb cleaning experimentation
« Reply #6 on: August 07, 2018, 03:07:49 AM »
2 minutes with high pressure cleaner.


Offline Derby City

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Re: Carb cleaning experimentation
« Reply #8 on: August 07, 2018, 03:59:23 PM »
Thanks for all the suggestions!  I'm going to use carb cleaner.
1974 CB 550

Offline evanphi

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Re: Carb cleaning experimentation
« Reply #9 on: August 08, 2018, 07:39:52 AM »
2 minutes with high pressure cleaner.

Brilliant!
--Evan

1975 CB750K "Rhonda"
Delkevic Stainless 4-1 Header, Cone Engineering 18" Quiet Core Reverse Cone, K&N Filter in Drilled Airbox
K5 Crankcase/Frame, K4 Head and Cylinders, K1 Carbs (42;120;1 Turn)

She's a mix-matched (former) basket case, but she's mine.

CB750 Shop Manual (all years), searchable text PDF
Calculating the correct input circumference for digital speedometers connected to the original speedometer drive