Carburetor issues - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 8 (permalink) Old 05-19-2019, 03:00 AM Thread Starter
jvb
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Carburetor issues

Does anyone know what this pipe does?
Is it some sort of breather?
As you can see it is broken. OD is 3mm. I was hoping I could remove it, cut of the ends and glue it back in. Or will this not work?
Thanks for any tips.
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post #2 of 8 (permalink) Old 05-19-2019, 09:44 AM
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I'm not a Mikuni expert, but this has been discussed before. Search and ye shall find...

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post #3 of 8 (permalink) Old 05-19-2019, 04:40 PM Thread Starter
jvb
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Quote:
Originally Posted by WSC View Post
I'm not a Mikuni expert, but this has been discussed before. Search and ye shall find...
Spent half an hour searching before I posted, I always do.
Will search some more.

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post #4 of 8 (permalink) Old 05-19-2019, 05:01 PM
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Part of choke circuit. I had the same problem and brazing did the job. I am not sure glue would resist condition there

Pet

Last edited by turkpet; 05-19-2019 at 05:07 PM.
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post #5 of 8 (permalink) Old 05-19-2019, 06:38 PM Thread Starter
jvb
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Quote:
Originally Posted by turkpet View Post
Part of choke circuit. I had the same problem and brazing did the job. I am not sure glue would resist condition there
Thanks. I thought of silver soldering it. Will give it a try.

1954 Zündapp DB255
1973 T140V Bonneville
1995 Thunderbird 900
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post #6 of 8 (permalink) Old 05-19-2019, 10:22 PM Thread Starter
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After a more extensive search, found some threads on here.
A few have tried adhesives. One even has a nice picture.

1954 Zündapp DB255
1973 T140V Bonneville
1995 Thunderbird 900
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post #7 of 8 (permalink) Old 05-22-2019, 08:01 PM
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I bought a 1996 Adventurer with only 5,000 miles on her and she ran like trash...turned out it was that little brass tube on the center carb. Couldn't figure it out until AFTER I rebuilt all three carbs, replaced the coils, wires and spark plugs. Granted, it needed the wires and plugs because the guy I bought it from had the stock original tire on the front and never even bothered to change the brake or clutch fluids. I hope he didn't hurt the engine running it like that during the "break-in period".

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post #8 of 8 (permalink) Old 05-24-2019, 02:43 AM Thread Starter
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I ended using Rapid Fix (great stuff) to adhere the tube to the carbie.
Then I used JB weld to seal it.
Finally touched up with some aluminium colour paint.
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