Stupid marbling question but I have to ask.. - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 20 (permalink) Old 07-29-2008, 10:03 PM Thread Starter
 
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Stupid marbling question but I have to ask..

When marbling you are supposed to plug the vacuum line coming off of the rear carb....now....after plugging it, are you supposed to put the line back onto the open port on the carb or just let the carb suck in open air??

I feel dumb...but oh well
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post #2 of 20 (permalink) Old 07-29-2008, 10:22 PM
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You don't really need to disconnect it, but if you do, be sure to plug the hole in the carb.

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post #3 of 20 (permalink) Old 07-29-2008, 11:07 PM
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vaccuum lines have to be plugged off

85 VN750 basketcase ( yes its a true 750, and no smog controls, its good to be Canadian)
It will have
a rebuilt 96 top end, rebuilt 85 bottom end
degoated, Eared
stripped, lowered, raked, bobbed,
reed valve boxes shaved
ported and polished
balanced
right side dump exhaust
heads and cylinders shaved for compression
looking for smoothbore sidedraft carbs
possibly fat bob tanks
modified vn800 or sportster drag pipes or I'll just make some

Chopperfix
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post #4 of 20 (permalink) Old 07-29-2008, 11:24 PM Thread Starter
 
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lines?? as in the one coming off the petcock too?
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post #5 of 20 (permalink) Old 07-29-2008, 11:37 PM
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the one from the petccock is good, unless the petcock is changed out to gravity feed., leave it be

I mispoke.

As a general rule, with carbs, vacuum lines have to be connected or plugged. if it isn't one it has to be the other. A carb sucking air at a vacuum port WILL run very lean,

Vents on the other hand alway must remain open, either to the inside of the airbox, or to atmosphere.

85 VN750 basketcase ( yes its a true 750, and no smog controls, its good to be Canadian)
It will have
a rebuilt 96 top end, rebuilt 85 bottom end
degoated, Eared
stripped, lowered, raked, bobbed,
reed valve boxes shaved
ported and polished
balanced
right side dump exhaust
heads and cylinders shaved for compression
looking for smoothbore sidedraft carbs
possibly fat bob tanks
modified vn800 or sportster drag pipes or I'll just make some

Chopperfix
Duck's Garage

Last edited by Duck; 07-29-2008 at 11:40 PM.
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post #6 of 20 (permalink) Old 07-31-2008, 10:11 PM
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I say spend the 35 bux and get the coaster kit from Cycle Tech of Loves Park, IL - find them on eBay. Comes with instructions, and if you save all your parts, you can put it all back later if you don't like it.

2017 Indian Roadmaster (current ride)
2003 VN1600A (Traded August 2017 to #1 son for a Bushmaster AR)
2001 VN750 bought 4/19/08 w/2309 miles(Sold April 2010 with just over 12,000 miles)
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post #7 of 20 (permalink) Old 08-25-2008, 11:30 PM
 
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ok, i know ill sound like a NO0B, but what is marbling?
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post #8 of 20 (permalink) Old 08-25-2008, 11:51 PM
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Marbling or coastering is the process of blocking off the reed valves. These provide fresh air into the exhaust process to burn off any residual fuel and reduce emissions. It is the primary reason for the popping on decel. Marbling describes using marbles in the hoses to block them off while leaving everything in place. Coastering is done by removing the canister and hoses, and blocking the hoses by capping them off, and/or installing solid plates in place of the reed valves. There is a ton of info in the verses on both processes. I went the coastering route. I like the look of the plate instead of the reed valve. I also wanted a little extra room under the seat for the relays I installed for my Stebel horn and VOM. You actually only see the left side. The right side is under the right ear. (unless you've removed the air filters, AKA ear shave, then you will see both.)

Chris
Wayne, NJ
1989 VN750-A5
VROC #27781
-Replaced/Fused Stator & Replaced/Relocated R/R (15K mi.)
-MF Battery
-De-Goated/Re-goated
-Coastered
-Splines Lubed
-Stebel Nautilus Horn
-AutoMeter 2" VOM
-Silverstar Headlight
-Refinished Gauge Rings and Mirrors(Flat Black)
-Refinished Swingarm/Lubed Pivots
-K&S Turn Signals Clear Cover/Amber Bulb
-Kenda Kruz 110/90-19 front 170/80-15 rear
-Clear Alternatives LED tail light
-Plexifairing III
-Willie & Max Saddlebags and SissyBar Bag
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post #9 of 20 (permalink) Old 08-26-2008, 12:05 AM
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Here are a couple of pics:

Capped reed valve CLICK HERE

Reed valve covered with solid plate CLICK HERE

Chris
Wayne, NJ
1989 VN750-A5
VROC #27781
-Replaced/Fused Stator & Replaced/Relocated R/R (15K mi.)
-MF Battery
-De-Goated/Re-goated
-Coastered
-Splines Lubed
-Stebel Nautilus Horn
-AutoMeter 2" VOM
-Silverstar Headlight
-Refinished Gauge Rings and Mirrors(Flat Black)
-Refinished Swingarm/Lubed Pivots
-K&S Turn Signals Clear Cover/Amber Bulb
-Kenda Kruz 110/90-19 front 170/80-15 rear
-Clear Alternatives LED tail light
-Plexifairing III
-Willie & Max Saddlebags and SissyBar Bag
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post #10 of 20 (permalink) Old 08-26-2008, 12:26 AM
 
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ok things have now become MUCH clearer with the pics, thanks chris!!
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