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TOPIC: Look what followed me home last weekend... '81 IT175H

Look what followed me home last weekend... '81 IT175H 14 Sep 2018 13:03 #11

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Mark,

I used Berrymans carb dip, but the old school "illegal" stuff you can't get anymore. I bought a 5ga pail a few years ago when I heard they were changing their formula. After the Berrymans bath, I rinse all the parts in kerosene and take a toothbrush to the exterior. Note that I didn't soak the petcock in Berrymans, only kerosene for that, as there is plastic inside (probably over thinking it but I wanted to be safe).

Edit: Mark, I'm wondering if the blackening is an aluminum vs. zinc thing?

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Look what followed me home last weekend... '81 IT175H 14 Sep 2018 14:10 #12

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Silencer packing arrived today...



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Look what followed me home last weekend... '81 IT175H 14 Sep 2018 14:12 #13

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You weren't overthinking... Berryman's will destroy plastic. Good call.

Great job! :likey

I have carbs made from aluminum (earlier) and later ones made from "Zamak" or whatever that alloy is they went to... the early lighter weight aluminum carbs are worse but both tend to tarnish and darken.

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1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250

Look what followed me home last weekend... '81 IT175H 14 Sep 2018 14:19 #14

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MarkT wrote: You weren't overthinking... Berryman's will destroy plastic. Good call.

Great job! :likey

I have carbs made from aluminum (earlier) and later ones made from "Zamak" or whatever that alloy is they went to... the early lighter weight aluminum carbs are worse but both tend to tarnish and darken.


Hmmmm...I'm not sure then. Came out nice though. Thx

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Look what followed me home last weekend... '81 IT175H 14 Sep 2018 14:20 #15

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Some new petcock parts arrived today too



Sediment bowl filter screen and sealing ring are NLA from Yamaha so the parts are from Honda, used in the '70s CB,CL models. I'll report back on how they work when I get the petcock re-installed. Fingers crossed!
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Look what followed me home last weekend... '81 IT175H 14 Sep 2018 20:07 #16

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Nice :likey

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Thanks Mark
Roseville, Ca.

'76 Bultaco 143 Frontera
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Look what followed me home last weekend... '81 IT175H 14 Sep 2018 20:12 #17

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I almost ruined a polished aluminum fork tube, left it in purple de-greaser. Started pitting, I was able to sand down and re-polish.

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Thanks Mark
Roseville, Ca.

'76 Bultaco 143 Frontera
'06 GL1800
07 DL650
74 DT360
75 Norton
73 CB500K
63 C200
87 PW50
64 McClane Edger

Look what followed me home last weekend... '81 IT175H 14 Sep 2018 20:38 #18

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mdscott wrote: I almost ruined a polished aluminum fork tube, left it in purple de-greaser. Started pitting, I was able to sand down and re-polish.


That purple stuff can be nasty. Years ago I was removing 40 year old baked on cosmoline from a BMW I was restoring. Castrol Super Clean (purple stuff) was the only thing that would make a dent in that old cosmoline and allow me to remove it. I thought "man, this stuff is a GREAT cleaner" so I decided to soak some misc hardware in the super clean overnight in an aluminum dish. Next morning I came into my shop and the whole bottom of the aluminum container was dissolved. What a mess. Use with caution!

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Look what followed me home last weekend... '81 IT175H 15 Sep 2018 16:23 #19

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Just wondering...are you sure the plastic in the petcock isn't the remains of the old black O-ring, the new one which is lying in front in the pic? Also, those fiber seals where the two screws pass through to mount the petcock to the fuel tank should still be available, if you wanted to replace those. They look pretty good, though. Are you replacing the oval O-ring between the petcock and the tank? I usually do that out of habit rather than necessity. If you reuse the old fiber washers and the old O-ring, and then after you fill the tank, one or more start(s) to leak, you have to drain the tank again.
Just sayin'...

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Look what followed me home last weekend... '81 IT175H 16 Sep 2018 10:21 #20

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Mothersbaugh wrote: Just wondering...are you sure the plastic in the petcock isn't the remains of the old black O-ring, the new one which is lying in front in the pic? Also, those fiber seals where the two screws pass through to mount the petcock to the fuel tank should still be available, if you wanted to replace those. They look pretty good, though. Are you replacing the oval O-ring between the petcock and the tank? I usually do that out of habit rather than necessity. If you reuse the old fiber washers and the old O-ring, and then after you fill the tank, one or more start(s) to leak, you have to drain the tank again.
Just sayin'...


The plastic I was talking about is in the body of the petcock, not the bowl...



And have no fear, ALL new orings, washers, and even screws are going into the petcock, just waiting for parts to arrive
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