Author Topic: Cb400f float demons  (Read 5373 times)

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Offline kyre

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    • CB400F / 466 Build Thread
Re: Cb400f float demons
« Reply #25 on: May 18, 2014, 04:24:20 PM »
Yes harisuluv I want to definitely thank you for helping me with this! I feeling like We're slowly getting somewhere.

First, new valve with new seat only. I'm comparing because I'm trying everything. What I meant was I put the old valve in the new seat just to see the fitment.  The new valve has some wiggle room where the old valve doesn't so much.

Ok so my old valves are incorrect. They never leaked in the 8 years they were on my bike before I tore into everything so I'm going to try to put those back in with their corresponding old seat and see what happens.  May as well since I've taken these off way too many times to count to try to fix the "new" valves. 

By OEM I mean I bought them from service honda and they had honda labeling. Seats and valves bought new at the same time.  Also they were really expensive. I believe around $30  each!! Ugh.


Guess I'll see what happens. I just put the old valves and seats back in and readjusted the float height to 21mm. When  the tang just touches the needle everything is very parallel.
CB400F / 466 Build Thread (currently in progress)
http://forums.sohc4.net/index.php?topic=105027.0

Offline harisuluv

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Re: Cb400f float demons
« Reply #26 on: May 18, 2014, 05:37:35 PM »
Keep in mind those two planes being parallel is just a guide that I use to tell me if they have been tweaked in relation to each other, it tells you nothing about the tang being tweaked in relation to the rest of the brass.

Sounds like you have real honda OEM vales and seats.  I would use them cause they are quality.  The problem is probably still your floats hanging too much. 

Offline chewbacca5000

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Re: Cb400f float demons
« Reply #27 on: May 18, 2014, 06:03:42 PM »
 Can you take pics of the underside of the float tang.  Sometimes they get a small dimple that causes them to hang up.  I don't always remember to check, but if it has dimples smoothing them out with some 400 grit really helps out.


Offline harisuluv

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Re: Cb400f float demons
« Reply #28 on: May 18, 2014, 08:01:43 PM »
Oh and by the way the old "seats" for the rubber tipped valves aren't actually their seats.  The seats that those rubber tipped valves are paired with are a non removable pressed in brass seat for a totally different model bike and style carb.  So...  just sayin'.