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Author Topic: 1981 CB900F  (Read 1250 times)

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Offline vozzy

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1981 CB900F
« on: April 23, 2012, 05:00:27 PM »
1981 CB900F. Bought as a work bike. 22K miles. All original except paint. Sounds like cam chain(s) is rattling, plus there is popping in exhaust when reving. Think I need to sync carbs and adjust chains. What will cause the popping?
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Offline nixonwylie9

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Re: 1981 CB900F
« Reply #1 on: April 23, 2012, 07:44:16 PM »
I would check the ignition timing probably not firing right ;)
good luck
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Offline nixonwylie9

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Re: 1981 CB900F
« Reply #2 on: April 23, 2012, 07:45:13 PM »
and plugs and plug gap so on
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Offline grcamna2

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Re: 1981 CB900F
« Reply #3 on: April 23, 2012, 07:53:09 PM »
Have you cleared out the tank/carbs. yet. ?
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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline vozzy

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Re: 1981 CB900F
« Reply #4 on: April 24, 2012, 05:09:33 AM »
I ran some Seafoam through tank. Need to change plugs out ASAP. Cheap insurance
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Offline grcamna2

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Re: 1981 CB900F
« Reply #5 on: April 24, 2012, 06:44:18 AM »
I recommend removing the carbs. and cleaning out All the passages and flushing out the tank to remove the fine sediment on the bottom of it that will clog you're small passages in the carbs.
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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline cb650

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Re: 1981 CB900F
« Reply #6 on: April 24, 2012, 02:13:23 PM »
If you decide to upgrade the shocks I'll take the old ones off you.
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18 grand and 18 miles dont make you a biker

Offline vozzy

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Re: 1981 CB900F
« Reply #7 on: April 26, 2012, 04:06:55 AM »
Upgrade? They look pretty good stock. Reservoirs and everything!
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Offline cb650

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Re: 1981 CB900F
« Reply #8 on: April 26, 2012, 12:48:23 PM »
Yes upgrade.    I have plenty that "LOOK" good but perform like a turd. ;D
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18 grand and 18 miles dont make you a biker
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