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Author Topic: What's wrong with this bike? CB400F  (Read 641 times)

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Offline LoopsAndLogic

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What's wrong with this bike? CB400F
« on: March 07, 2009, 01:52:27 PM »
I'm pissed to hear a 400F sounding like this!!!


http://cgi.ebay.com/ebaymotors/Honda-CB-400-FOUR-SUPERSPORT-1975-HONDA-CB400F-SUPERSPORT-400FOUR-5300-ORIG-MILES_W0QQcmdZViewItemQQcategoryZ80647QQihZ012QQitemZ220374071425QQrdZ1QQsspagenameZWDVW

I hope the New owner know's what he's getting into.

Poor baby....I'm talking about the bike >:(

LL

Sorry, had to vent!!
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My rides:
75' 76' Honda CB400F Super Sports
86' Honda XR600R for Street Madness
84' Honda Interceptor VF500

Past Rides:
80' Honda CX500C Fully Dressed
81' Honda CB650C very nice!
83' Kawasaki KZ550 A3
78' Hondamatic 400 Hawk
80' 81' 82' Honda GL500 Silverwing Insterstate

Offline Tim2005

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Re: What's wrong with this bike? CB400F
« Reply #1 on: March 07, 2009, 02:11:44 PM »
Ouch. Sounds like it's running on 2 then trying to clear when he revs it. Nothing a good carb clean and ignition service won't cure... go on... buy it... looks pretty good potential.
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Offline hoodellyhoo

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Re: What's wrong with this bike? CB400F
« Reply #2 on: March 07, 2009, 02:17:07 PM »
sounds like the carbs are waaaay out of synch as well
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1972 CB350F (Back from the Dead!)- http://forums.sohc4.net/index.php?topic=20822.0
1965? S65 - Coming Eventually!
1972 CB750K2 (father-son project)
1976 CB750K6- (sold) http://forums.sohc4.net/index.php?topic=96859.0
1976 CB750K6 (sold)- http://forums.sohc4.net/index.php?topic=62569.0

Offline Caaveman82

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Re: What's wrong with this bike? CB400F
« Reply #3 on: March 07, 2009, 03:05:46 PM »
If you watched the video, when he passed over the tach it was ideling at like 2.5k right before he reved it again.

idiot probably has the idle screw all the way in.

it does also sound like it is misfiring a bit..
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Do not act as though you could kill time without injuring eternity. - Dave Thoreau

Offline DammitDan

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Re: What's wrong with this bike? CB400F
« Reply #4 on: March 07, 2009, 06:37:19 PM »
I'm gonna go with the old standard mixture of intake air leak (high idle), incorrect float height (gas leak), and badly out-of-adjustment carbs (engine rattle).  And it's backfiring because he's got the mixture screws and idle adjust all out of whack.

Why anyone would ride a bike with problems like this (and pretend it doesn't have any!) is beyond me.
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CB750K4
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