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Choke operation

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cj haughey
Hyper Viper
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Posts : 42

Choke operation

Post by cj haughey on Wed 04 Oct 2017, 8:17 pm

Just wondering is there a diagram for the choke operation as trying to see if my choke is stuck. The bike starts grand but once warm it then sticks at 4k rpm and black smoke so looks like the choke is not releasing fully.
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Jameshambleton
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Location : Bedale, North Yorkshire

Re: Choke operation

Post by Jameshambleton on Wed 04 Oct 2017, 8:21 pm

4k rpm will be a stuck choke, maybe worth pulling the tank off and checking to see if it's sticking. It's usually a hard to get to place and the slider on the carbs gets clogged up with muck so it stops it returning. 

Personally I'd be worried about the black smoke.
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cj haughey
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Posts : 42

Re: Choke operation

Post by cj haughey on Wed 04 Oct 2017, 8:28 pm

It is black smoke when you rev it out so seems choke related. It is a bike that has sat up for at least a year and have been gently freeing out everything on it.
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Jameshambleton
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Location : Bedale, North Yorkshire

Re: Choke operation

Post by Jameshambleton on Wed 04 Oct 2017, 8:30 pm

Hopefully it's just pushing a build up of soot out of the exhaust, my dads hornet 900 does the same as he hardly used it this year
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cj haughey
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Re: Choke operation

Post by cj haughey on Wed 04 Oct 2017, 8:34 pm

So do I but starts too well and idles when cold perfect.
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wornsprokets
the 900
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Posts : 1336
Location : dublin

Re: Choke operation

Post by wornsprokets on Wed 04 Oct 2017, 9:14 pm

My cb500s was left up for over 6/7yrs...  there was no black smoke out of it... but saying that the the tank and carbs were run dry......is airfilter blocked...
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cj haughey
Hyper Viper
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Posts : 42

Re: Choke operation

Post by cj haughey on Fri 06 Oct 2017, 6:12 pm

Found the problem and it was a vacuum hose off and all fixed and pulling well
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eternally_troubled
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Re: Choke operation

Post by eternally_troubled on Sat 07 Oct 2017, 11:42 am

Glad to hear you solved the problem - it is still worth checking the choke operation while you are there Smile
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cj haughey
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Posts : 42

Re: Choke operation

Post by cj haughey on Sat 07 Oct 2017, 12:17 pm

@eternally_troubled wrote:Glad to hear you solved the problem - it is still worth checking the choke operation while you are there Smile

I checked it all and nice and smooth but does need a throttle return cable so will order one up so as to have her right.
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Jameshambleton
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Location : Bedale, North Yorkshire

Re: Choke operation

Post by Jameshambleton on Sat 07 Oct 2017, 3:24 pm

@cj haughey wrote:Found the problem and it was a vacuum hose off and all fixed and pulling well

That's awfully strange as when my vacuum hose is disconnected my bike idles really poorly and often stalls  scratch

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