Still pops on decel - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 8 (permalink) Old 08-03-2010, 11:40 PM Thread Starter
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Still pops on decel

Hears the deal.
Removed the "goats belly", drilled holes in mufflers. Sounds good!
I marbled it and set the air screws to 3 turns out.
Now on decel it still pops but only the rear cylinder, the front is fine!
What's up with that?
I know that the air screw may fall out if I go much further.
I have NO air leaks in the exhaust.
Can there be some "breather" hose or something simple happening?
The pop sound was OK in the begining, but now it ain't!
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post #2 of 8 (permalink) Old 08-03-2010, 11:43 PM
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could be an air leak at the reed valves. I would recommend coastering instead of marbleing


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post #3 of 8 (permalink) Old 08-04-2010, 01:10 AM Thread Starter
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I have to correct this.
It is the FRONT cylinder, not the rear.
If it means anything, It is a 2002.

No need to worry about popping now cause it won't start!!
Just washed the pig.
Getting tons of spark. Looked everywhere for wet things and all are dry.
What a joke this thing can be!!!

Good thing I have other bikes to ride!! I'm ready to put this one in the corner for a while!!
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post #4 of 8 (permalink) Old 08-04-2010, 01:35 PM
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I've never minded the popping on decel. So I've never considered it an issue.
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post #5 of 8 (permalink) Old 08-04-2010, 01:40 PM
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Dry the spark plugs and the plug ins. Use a rag and dry down into the ressed plug.

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post #6 of 8 (permalink) Old 08-05-2010, 03:52 AM Thread Starter
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Well.......all is OK again!
Took the plugs out.......bead blasted them in my cabinet.......turned the air screw out a tad more and presto!

I also set the idle up to 1000 rpm and it's much easier to start cold or hot.

I had the idle set pretty low cause I grew up riding Harleys and I always set the idle 2 rpm from stalling! I like the ka plunk...............ka plunk but I guess that ain't going to happen with this sickle.
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post #7 of 8 (permalink) Old 08-05-2010, 09:43 AM
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I washed my bike over the week end and lost my rear cylinder. Turned out that the water had caused a bit of corrosion on the coil connections. All good now.
I don't like to wash my bike at the car wash, but it was getting rather nasty looking.

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post #8 of 8 (permalink) Old 08-05-2010, 09:52 AM
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Quote:
Originally Posted by honest Al View Post
Hears the deal.
Removed the "goats belly", drilled holes in mufflers. Sounds good!
I marbled it and set the air screws to 3 turns out.
Now on decel it still pops but only the rear cylinder, the front is fine!
What's up with that?
I know that the air screw may fall out if I go much further.
I have NO air leaks in the exhaust.
Can there be some "breather" hose or something simple happening?
The pop sound was OK in the begining, but now it ain't!
back the mixture screw on that cylinder in 1/4 turn increments 'til popping is gone. I have one at 3 1/2 and the other at 4.
BTW: Running 89 octane will also help keep the popping down.

Last edited by VoIPDoc; 08-05-2010 at 09:54 AM.
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