Sunday night carb rebuild

If it's broken or just needs tweaked

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andreortiz
Posts: 14
Joined: Sun May 25, 2014 4:58 pm
Location: Austin, TX
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Sunday night carb rebuild

Postby andreortiz » Sun Aug 31, 2014 10:33 pm

Hello everyone - I hit a low point today with my 1980 650C and spent most of the day moping around and telling myself, "Fuck it, sell the bike and buy a Triumph!". When that didn't fix my problem, I decided to pull the carbs and start going through them... I discovered something interesting.

The needle on #2 seems to be gone... Now, I'm no mechanic and to be clear, I'm just BS'n my way through this project but something about this needle seems wrong. See below.

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In addition, you see that O-ring? That thing just rolled out of the carb when I got it to the work bench. I think it came from #2 but I cant say for sure.

The jets seem to be ok, meaning - they look shiny and clean.

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I did, however, order some new ones based on a post I saw here. I'm running these K&N air pods so I ordered these jets from Jets-R-Us:

GENUINE Keihin main size 120 (SKU- 99101-393 )
Keihin slow jet size 42 (SKU- K 3L)

Tomorrow, I'll attempt to get this assembly apart.

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Any advice, suggestion or opinions so far are more than welcome!

jcasey007
Posts: 225
Joined: Sun Jan 13, 2013 3:38 pm
Location: Stratford Upon Avon - UK

Re: Sunday night carb rebuild

Postby jcasey007 » Mon Sep 01, 2014 3:06 am

I love these carbs NOT.

the pilot jet needle on number 2 could still be stuck in the carb and may be blocking the gallery on carb 2. when you put these pilot screws back in make sure you have all 4 o-rings out of the bodies and that you re-assemble with the plain washer between the spring and the o ring.

After stripping my carbs at least 10 time in the past 2 years I can tell you that I did not have a single jet blocked but I found that the galleries in the carbs were always found to be blocked. And in many cases I found that galleries that I had previously cleaned out became blocked again, as I obviously didn't do a good enough job.

Jim


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