Desmog to Stop Vacuum Leaks???

[whitestroke]

After looking at this smog job I see no reason it shouldn't work to eliminate all smog related vacuum leaks.  The #3 and #4 vacuum lines from intake runners are capped. 
I will replace the runner o-rings and then all sources of vacuum leaks should be eliminated.

Is there something im missing?
Other then the top of engine is still a bit crowded.
Also this is a Ca. Valk.

[Patrick]

Its been awhile since I've been under a tank, but, it looks like your #3 and#4 lines are still.. So someone popped those lines, left them and capped the intakes ? Without looking at the valve assembly and purge valve I'm wondering if exhaust can't eventually migrate back thru those vacuum lines.. It sounds as if you want to remove the smog stuff, so, how about just installing good quality vacuum lines and have everything work as it should ?

[whitestroke]

Its been awhile since I've been under a tank, but, it looks like your #3 and#4 lines are still.. So someone popped those lines, left them and capped the intakes ? Without looking at the valve assembly and purge valve I'm wondering if exhaust can't eventually migrate back thru those vacuum lines.. It sounds as if you want to remove the smog stuff, so, how about just installing good quality vacuum lines and have everything work as it should ?

#3 and #4 are capped, If your talking about the black lines (in picture), they go to the Carb Air Vent (ca. only) they connect up by the top of the carbs.  

Isn't the only way for exhaust to get in the system, would be to come through check/reed valve box?
Check/reed valve box is capped with (red caps).  The rest of that system ( hose, diaphram, #3,#4 lines are removed. What you see is what I have.
 

[Bigwolf]

Quote:

After looking at this smog job I see no reason it shouldn't work to eliminate all smog related vacuum leaks.  The #3 and #4 vacuum lines from intake runners are capped.  

You are correct .... sort of.  I see the PAIR control valve has been removed and also the air supply tubes from it to the PAIR valves have been removed.  The PAIR valves have been capped where those supply tubes would have attached.  With caps on the number 3 and number 4 intake runners, that should take care of any vacuumn leaks at the PAIR valve system.  However, there are 2 other things to think about.  1) The PAIR control valve would have also been connected to the underside rear of the air box by a tube about the same diameter as the ones that went to the PAIR valves.  If that port on the bottom of the air filter box is not capped it will cause a lean condition not to mention a source of dirt to enter between the filter and the carbs.  2) I am thinking that since the PAIR valves are capped on the control side, they are probably not blocked/sealed on the exhaust side.  If that is true, then it is possible that exhaust could be drawn from one exhaust port to another (this would only happen with a bent or broken reed valve) and that could cause a disruption of the exhaust flow.  This exhaust flow thing is probably no big deal but while you are in there, it would not take much more time to just pull the rubber tubes off the exhaust side of the PAIR valves and insert a rivit or steel ball just large enough to seal those tubes.  If you take a look at some photos of the stealth desmog kits, you will see that they use a rivit just this way.

Ride safe,
Wolf

[whitestroke]

BigWolfs concerns;

1  The underside of the airfilter where air is drawn in (to Pair Control Valve) is capped with the same type Red plug you see on the reed valves.

2  It sounds like air getting by the reeds is the only possible problem with the above picture?  Seems that it shouldn't create a problem even if exhaust got by the reeds, as it's just trapped in the reed box.
But easy enough I'll block it on the exhaust side to.

[Patrick]

I need to proof read.. I meant to type, it seems like you 'don't' want to remove the smog stuff..

[whitestroke]

I do want to keep the smog stuff. Ca. is going to end up checking.  Just like they started checking diesels vehicles 2 years ago.  Even my 10 year old diesel now gets smogged.

[Patrick]

Ah, OK.. Now I understand your posts.. It shouldn't be difficult to put it back to the way Honda intended.. Honda didn't use very good quality vacuum lines/caps.. So good lines/caps should last quite a long time.. You'll hear some 'ticking' as the reeds do their job..

[Ricky-D]

I do want to keep the smog stuff. Ca. is going to end up checking.  Just like they started checking diesels vehicles 2 years ago.  Even my 10 year old diesel now gets smogged.

This reasoning is wrongheaded for more reasons than would be easily listed, but of course, perfectly rational wanting to avoid commitment.   Eventually, time will prove the folly of this approach.

This exact subject has been thrashed and thrashed again on many biker forums, VRCC not withstanding.

***

[fudgie]

What the 2 red capped things at 11 and 5 o'clock?

[whitestroke]

Ricky-D
My smog stuff is disconnected I just want to keep it in place for easy reconnect come smog time.

Fudgie
Red caps are on the reed/check valves to keep air from getting sucked in on decell, just like plugging exhaust with plugs on engine for desmog.
That is where all 6 exhaust ports leed to.