Where do you marble? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 13 (permalink) Old 06-14-2007, 03:20 PM Thread Starter
 
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Where do you marble?

Greetings everyone,

I picked up a loaded 02 vn750 last weekend with 3900 orig. miles on it and have been hovering around your site this week, very good info indeed.

I have already (successfully) Grambo'd which I believe spooked the owner into selling in the first place? Long story short, I also have the preverbial 'paint can rattle' under the seat and understand it is common to marble the air-valve? Question, can you marble in the box itself or do you need to stuff them at the valve cover ends. I'm considering coastering but want to get through inspection before I rip it out.
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post #2 of 13 (permalink) Old 06-14-2007, 03:41 PM
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Take the hoses form the reed valave off at the valve body and put a marble in each one. Re-attach to valve body to keep look of intact system.

Remove small vacuum hose (not fuel line) from right carb and plug open port with rubber vacuum stopper.

Pull vacuum hose back into hidden area under seat to maintain look of intact system.

Jon

93VN750, under re-construction
vn750.com Member # 828

Rick's Stator and R/R
MF AGM Battery
Coastered
Degoated
Shaved & Jetted
Iridium's
MAC Tapered Staggered Pipes
Battery/Temp/Clock Gauge
Stainless Steel Brake Lines
Dunlop D-404's
23,XXX miles and holding pending gasket change (underway!!!)
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post #3 of 13 (permalink) Old 06-14-2007, 03:51 PM Thread Starter
 
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Excellent, Thanks Jon....

Will I need to adjust the carb mixture(s) afterwards? or what symptoms should I be aware of that will indicate the necessity to do so.
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post #4 of 13 (permalink) Old 06-14-2007, 04:12 PM
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I wouldn't touch anything unless you get excessive muffler popping.

Then richen up the mixture screws (clockwise) a little at a time until popping is minimized.

Jon

93VN750, under re-construction
vn750.com Member # 828

Rick's Stator and R/R
MF AGM Battery
Coastered
Degoated
Shaved & Jetted
Iridium's
MAC Tapered Staggered Pipes
Battery/Temp/Clock Gauge
Stainless Steel Brake Lines
Dunlop D-404's
23,XXX miles and holding pending gasket change (underway!!!)
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post #5 of 13 (permalink) Old 06-14-2007, 04:23 PM
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The popping you speak of, is that when you eas off the throttle? My bike does that, but I havn't bothered with anything yet.
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post #6 of 13 (permalink) Old 06-14-2007, 04:31 PM Thread Starter
 
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Thanks again Jon, I will grab some marbles over the weekend and post my results.
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post #7 of 13 (permalink) Old 06-14-2007, 04:37 PM
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Quote:
Originally Posted by kanuck69 View Post
The popping you speak of, is that when you eas off the throttle? My bike does that, but I havn't bothered with anything yet.
The "coastering" or reed valve disabling this thread talks about is the best way to stop the muffler popping on deceleration.

Jon

93VN750, under re-construction
vn750.com Member # 828

Rick's Stator and R/R
MF AGM Battery
Coastered
Degoated
Shaved & Jetted
Iridium's
MAC Tapered Staggered Pipes
Battery/Temp/Clock Gauge
Stainless Steel Brake Lines
Dunlop D-404's
23,XXX miles and holding pending gasket change (underway!!!)
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post #8 of 13 (permalink) Old 06-14-2007, 09:00 PM
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Quote:
Originally Posted by 93VN750 View Post
I wouldn't touch anything unless you get excessive muffler popping.

Then richen up the mixture screws (clockwise) a little at a time until popping is minimized.

Jon
Isn't it counter clockwise to make it richer ?

Ron from Jersey
2005 VN750
HellFire windshield
Kaw extended backrest
Cobra exhaust
Re-located stator wires
Side bags
15,000 Miles July/2012
It's PAID OFF ! May 2009
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post #9 of 13 (permalink) Old 06-15-2007, 08:04 AM
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Bonzer, when I did mine I used copper tubing caps for 5/8 od tubing and they worked great. Pulled off hoses from reed valves and the caps snapped right over the hose nipple on the reed valve. Then I replaced the hose back over the capped connection. Can't tell anything was done. Stopped the majority of backfiring on deceleration. Still do get an occasional pop, but I can live with that. Did not adjust the idle mixture screws as of yet. That would probably eliminate it altogether. Good Luck.
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post #10 of 13 (permalink) Old 06-15-2007, 09:11 AM
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Yes counter clockwise richens the mixture and clockwise leans the mixture out.

Brian Manchester
'89 "GRIMM"

CUSTOM-Seat,quick detach backrest,2.5"slam brackets,Pipes,Fender struts,head light mount,9"rise dragbars,Grips,Mirrors, turnsignals,LED brake light/Lic.plate frame,Chopper headlight. Shaved,Jetted,coastered,polished forks,saddle&Tool bags,horns moved,180/70/15 rear tire!!! Yes a 180!!!!And other stuff.....
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