I am a little confused - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
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post #1 of 6 (permalink) Old 04-24-2008, 11:11 AM Thread Starter
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Question I am a little confused

Ok I have been thinking of doing an ear shave on my '86. I seen this Reed block off kit on ebay. http://cgi.ebay.com/ebaymotors/ws/eB...m=220225680418 From my understanding on doing an ear shave it entails blocking off the reeds, capping a couple vacuum lines and removing the snorkel, mounting pods and rejetting the cards. Ok I get all that, but this ebay listing states that rejetting is not needed with his reed block off kit. Now that doesn't make any sense to me, one would think that once you block off the reeds it wouldn't matter if you removed the snorkel or not, it would effect the jetting all in itself. Can anyone explain it to me or is it just that this guy has no idea what he is talking about? Carbs aren't my strong point so he might be 100% correct, hence the reason I am a little confused. Any help on this matter would be awesome.

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post #2 of 6 (permalink) Old 04-24-2008, 11:56 AM
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Just blocking the valves isn't quite the same as an ear shave.
With the ear shave, you are completely changing the amount of air that gets into the system.
With just blocking the valves (or marbling) you are only stopping air from recirculating through the system.


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post #3 of 6 (permalink) Old 04-24-2008, 12:10 PM
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Hmm, I understood the reed valves pumped fresh air into the exhaust to promote more complete burning of hydrocarbons thus lowering O2 out the pipe and blocking exhaust gases from re-entering the system. Correct me if I'm wrong.
DT

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post #4 of 6 (permalink) Old 04-24-2008, 12:17 PM
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Quote:
Originally Posted by dirtrack650 View Post
Hmm, I understood the reed valves pumped fresh air into the exhaust to promote more complete burning of hydrocarbons thus lowering O2 out the pipe and blocking exhaust gases from re-entering the system. Correct me if I'm wrong.
DT
That could be?
I thought it sent the unburned gasses back thru? But I don't know for sure.
My bike pops, but I kinda like it, so I haven't done anything like this to know for sure what it does.


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post #5 of 6 (permalink) Old 04-24-2008, 12:50 PM
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The popping is the byproduct of burning exhaust gases in the pipes and lean fuel mixture to meet EPA standards. When we shave, marble, rejet to get rid of the popping and increase performance, we are adding richness to the fuel mix.

DT

95 VN750 (eBay)31k+
GL1100 front fender
OEM engine guard
OEM high back rest
'V-Twin' HWY pegs
Black 750 Spectre handlebars
SunPro Volt Meter (Amazon)
Maier bug shield (JCW)
Bar Ends anti-vibe (JCW)
Emgo air filters
Tank bag-Eclipse
Tail bag-FroZone Cooler
Back Rest-Igloo 6 pak cooler
WalMart Saddle Bags
R/R Relocate
Dry Splines Lubed
AGM DieHard-Sears
Gutted Goat
Sporster XL Mufflers
LED's-stop,tail,turn,marker
Pickup coil mod to .45mm
Silverstar headlight
Rotella T6
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post #6 of 6 (permalink) Old 04-24-2008, 12:52 PM
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BTW - that's a good price for the ebay item. I made mine (including gaskets) but would have purchased that kit for that price.

DT

95 VN750 (eBay)31k+
GL1100 front fender
OEM engine guard
OEM high back rest
'V-Twin' HWY pegs
Black 750 Spectre handlebars
SunPro Volt Meter (Amazon)
Maier bug shield (JCW)
Bar Ends anti-vibe (JCW)
Emgo air filters
Tank bag-Eclipse
Tail bag-FroZone Cooler
Back Rest-Igloo 6 pak cooler
WalMart Saddle Bags
R/R Relocate
Dry Splines Lubed
AGM DieHard-Sears
Gutted Goat
Sporster XL Mufflers
LED's-stop,tail,turn,marker
Pickup coil mod to .45mm
Silverstar headlight
Rotella T6
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