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Author Topic: Press fit main jets - 400F  (Read 633 times)

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Offline gregk

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Press fit main jets - 400F
« on: August 17, 2007, 01:53:19 PM »


I removed the mains and noticed that the 'O" ring is shot on at least 2 of the carbs.  These two were running rich I think
Would a faulty "O" ring cause this?

Greg
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I don't want it to go like a motorcycle, I want it to go like a rocket!

Offline kslrr

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Re: Press fit main jets - 400F
« Reply #1 on: August 17, 2007, 02:35:57 PM »
Yes it would.  Get yourself a metric O ring set from Auto-Zone (or what ever auto parts store you have around).  You will find an O ring that will fit and if it feels too tight, use a little Marvels Mystery Oil to lube it.
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Now  1972 CB350FX (experimental v2.0)
        1981 CB650c Custom with '79 engine (wifes)
        1981 CB650 engine
        2004 HD XL883C Custom
        1977 Yamaha XS750D (in progress)
Then 1972 CL175
        1964 Yamaha YGS-1T
No ride is a Bad ride

Offline bryanj

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Re: Press fit main jets - 400F
« Reply #2 on: August 18, 2007, 05:52:37 AM »
"O" ring size is 4.2 x 1.1 (mm of couse) and dont forget gas proof!
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Offline gregk

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Re: Press fit main jets - 400F
« Reply #3 on: August 20, 2007, 07:17:22 AM »

I was able to get the carb bank out by removing the metal inlet runner from the airbox first.  The rest came out easy.  Replaced the float needle and main jet o rings and the bike now runs perfect.  I n't know why I put this project off so long.  It's like having a new bike to ride and I can't get enough of it.

Thanks

Greg
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I don't want it to go like a motorcycle, I want it to go like a rocket!

Offline kslrr

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Re: Press fit main jets - 400F
« Reply #4 on: August 20, 2007, 08:40:17 AM »
Good job! Ain't it nice when just a little work makes such a big difference?
Logged
Now  1972 CB350FX (experimental v2.0)
        1981 CB650c Custom with '79 engine (wifes)
        1981 CB650 engine
        2004 HD XL883C Custom
        1977 Yamaha XS750D (in progress)
Then 1972 CL175
        1964 Yamaha YGS-1T
No ride is a Bad ride
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