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 79 CB650 Blocking the Air Cut Off Valves 
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Joined: Sat Sep 18, 2010 6:11 am
Posts: 27
Location: Northern Ontario, Canada
Post 79 CB650 Blocking the Air Cut Off Valves
Read a previous post about blocking the air cut off valve inlet. Trying to replace the valves is a PIA as the carbs have to be separated.

I'm thinking of using a cutoff finishing nail and epoxy to block the inlet as shown below:

Image

Any good or bad comments before I do this?


Sat Mar 03, 2012 2:21 pm
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Joined: Mon Mar 06, 2006 1:53 am
Posts: 5034
Location: southern Germany
Post Re: 79 CB650 Blocking the Air Cut Off Valves
If you like to insert steel parts, you have to be really sure they stay there in place. Less critical seems pure epoxy or soft soldering tin.

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Sun Mar 04, 2012 6:17 am
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Joined: Sat Sep 18, 2010 6:11 am
Posts: 27
Location: Northern Ontario, Canada
Post Re: 79 CB650 Blocking the Air Cut Off Valves
I did a test fit and the nail is snug, the nail head will prevent it from being sucked into the carbs.

I'll install them today and post back the results.


Sun Mar 04, 2012 6:20 am
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Joined: Mon Mar 06, 2006 1:53 am
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Location: southern Germany
Post Re: 79 CB650 Blocking the Air Cut Off Valves
gaillarry wrote:
I did a test fit and the nail is snug,
In this case Loctite may be a good idea.

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Sun Mar 04, 2012 6:30 am
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Joined: Sat Sep 18, 2010 6:11 am
Posts: 27
Location: Northern Ontario, Canada
Post Re: 79 CB650 Blocking the Air Cut Off Valves
Loctite it is.

I'm going by this thread:

http://www.hondacb650.com/viewtopic.php?f=4&t=722&hilit=air+cut+off+valve&start=30

It mentions blocking off the other side - but where? I'm just doing the ones circled in my picture.


Sun Mar 04, 2012 6:55 am
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Joined: Sat Sep 18, 2010 6:11 am
Posts: 27
Location: Northern Ontario, Canada
Post Re: 79 CB650 Blocking the Air Cut Off Valves ( SUCCESS )
Got the carbs back on again and the bike started right up, only needed the choke for 2 minutes, then it idled smoothly and good throttle response.

I just plugged the air box side of the carbs. I'm very impressed with this mod.

It's cold outside ( -24C )and we had 25cm of snow yesterday, so a test ride is on hold.


Mon Mar 05, 2012 3:53 pm
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