carb-reed valve? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 14 (permalink) Old 05-08-2012, 01:13 AM Thread Starter
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carb-reed valve?

I was working today on my recently aquired 2nd 04 750, (yea we all need a matching pair) and something caught my eye. There was a buldge in the vacume line coming off the right carb going to the canister looking thing under the seat, I think the reed valve hoses all connect there. The bulge turned out to be a small screw intentionally shoved in there. The reed valve hoses are intact, no marbles or bulges. My ? is why would you block off that vacume line?? I cut it out and reattached and can tell no difference! Maybe this was a way to get around marbleing the reed valve lines? And on the funny side, the next time you have your tank off, you know those rubber grommets that go on the inside of the front mounting brackets, the ones that fall out and takes forever to find!, try putting those on the outside of those brackets!!! hit about 5k rps, now that is a scarry sound!!!!! Oh yea this is not a Cal bike. Thanks

04-3,200 miles bought July 2011 with 928 miles. Loaded with acessories to many to list here, see my albums for more details! I also make a custom tank bib specific for the 750 if anyone is interested, ck my albums for some pics.
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post #2 of 14 (permalink) Old 05-08-2012, 01:54 AM
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Not sure why they would plug just that one, as they really needed to marble or coaster the bike at that rate. I'd just go ahead and finish the job!

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
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post #3 of 14 (permalink) Old 05-08-2012, 02:00 AM Thread Starter
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I really see no need to marble, I mean "it aint broke", I just can't see any reason to put a screw in there!

04-3,200 miles bought July 2011 with 928 miles. Loaded with acessories to many to list here, see my albums for more details! I also make a custom tank bib specific for the 750 if anyone is interested, ck my albums for some pics.
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post #4 of 14 (permalink) Old 05-08-2012, 11:38 AM
Crap, I WAS in 5th gear.
 
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The people that disable the air injection system either don't like the popping on deceleration and/or want to limit the amount of blueing of their chrome on the headers. I liked the popping, the blue- not so much.
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post #5 of 14 (permalink) Old 05-08-2012, 11:47 AM
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Originally Posted by romeobravo172 View Post
I really see no need to marble, I mean "it aint broke", I just can't see any reason to put a screw in there!
Well, the emissions system is unnecessary. It was not how the bike was originally designed, as Canadian and European models do not even have the reed valves! They are coastered from the factory.

Get rid of that junk, in my opinion!

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
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post #6 of 14 (permalink) Old 05-08-2012, 04:48 PM
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That one small hose contols the air valve that lets air into the exhaust. If you disable the valve it is almost the same a marbleing. That valve makes a clattering sound when in opperation.

02 honda sabre 1100
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post #7 of 14 (permalink) Old 05-08-2012, 10:13 PM
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Quote:
Originally Posted by Kelly2001 View Post
The people that disable the air injection system either don't like the popping on deceleration and/or want to limit the amount of blueing of their chrome on the headers. I liked the popping, the blue- not so much.
I was going to post a thread asking about popping on deceleration and whether it's normal and what I can do to stop it, I think I just got my answer. Will it hurt my machine if I leave it popping?
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post #8 of 14 (permalink) Old 05-09-2012, 12:02 AM
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The popping is normal. The fresh air going into the exhaust help to complete the fuel burn. That is where the popping comes from.

02 honda sabre 1100
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post #9 of 14 (permalink) Old 05-09-2012, 09:18 AM
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Quote:
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I was going to post a thread asking about popping on deceleration and whether it's normal and what I can do to stop it, I think I just got my answer. Will it hurt my machine if I leave it popping?
My bike never had the emissions stuff on and it still pops on decell so I guess it is normal.
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post #10 of 14 (permalink) Old 05-09-2012, 10:47 AM
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Originally Posted by Swagman View Post
My bike never had the emissions stuff on and it still pops on decell so I guess it is normal.
It is not normal, honestly.

You either need to adjust your idle mixture screw, or you have some small leak at the exhaust gasket.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
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