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Carb/Tuning The magical art of tuning/jetting the VMax. Shawn Kloker & Maleko89 are the forum moderators.

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Re: Stumble at high RPM, popping, and cool header
  #11  
Old 02-11-2018, 11:40 PM
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Default Re: Stumble at high RPM, popping, and cool header

It cost me ~$30 and a couple hours to make a set for my Venture. Getting your rear Vmax coils out is pretty straight forward but removal of the fronts is a motherfucker. I understand why some folks leave the fronts in place after going to cops. I'm OCD and they had to come out! I bought a set for the Vmax but had to remake them. Its really not hard to do.
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Re: Stumble at high RPM, popping, and cool header
  #12  
Old 02-12-2018, 10:27 AM
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Default Re: Stumble at high RPM, popping, and cool header

If the carbs are apart and on the bench, I'd buy some jet block gaskets and pull the pilot jets just to make sure they are clean.

The OEM spark plug boots can be disassembled. There are pictures of it floating around on the site. It may be worthwhile to clean those up.

Bulk copper core plug wire is cheap and readily available

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Re: Stumble at high RPM, popping, and cool header
  #13  
Old 02-12-2018, 11:25 AM
Tyboy11 Tyboy11 is offline
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Default Re: Stumble at high RPM, popping, and cool header

Quote:
Originally Posted by mabdcmb@yahoo.com View Post
If the carbs are apart and on the bench, I'd buy some jet block gaskets and pull the pilot jets just to make sure they are clean.

The OEM spark plug boots can be disassembled. There are pictures of it floating around on the site. It may be worthwhile to clean those up.

Bulk copper core plug wire is cheap and readily available

Sent from my SM-G930V using Tapatalk

Agreed, jet block gaskets and other packings are in route. I ordered 4 of the K & L carb kits. I'm going to pull jets and clean up the carb the best I can before re-installation.

I'll look around for the boot disassembly and plug wire info.

Thanks,
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Re: Stumble at high RPM, popping, and cool header
  #14  
Old 02-12-2018, 01:02 PM
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Default Re: Stumble at high RPM, popping, and cool header

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Originally Posted by Tyboy11 View Post
Agreed, jet block gaskets and other packings are in route. I ordered 4 of the K & L carb kits. I'm going to pull jets and clean up the carb the best I can before re-installation.

I'll look around for the boot disassembly and plug wire info.

Thanks,
Here is the pic, or you can do these.

https://www.sparkplugs.com/product.aspx?zpid=20073
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File Type: jpg Vmax boot.jpg (4.3 KB, 14 views)
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Re: Stumble at high RPM, popping, and cool header
  #15  
Old 02-12-2018, 02:49 PM
Tyboy11 Tyboy11 is offline
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Default Re: Stumble at high RPM, popping, and cool header

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Originally Posted by Traumahawk View Post
Here is the pic, or you can do these.

https://www.sparkplugs.com/product.aspx?zpid=20073
Thank you for the info!
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Re: Stumble at high RPM, popping, and cool header
  #16  
Old 02-12-2018, 05:15 PM
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Default Re: Stumble at high RPM, popping, and cool header

If you buy new plug wire, get 7mm copper core.
You'll have a hard time getting 8mm to fit.
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Re: Stumble at high RPM, popping, and cool header
  #17  
Old 02-12-2018, 06:56 PM
Tyboy11 Tyboy11 is offline
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Default Re: Stumble at high RPM, popping, and cool header

Quote:
Originally Posted by mabdcmb@yahoo.com View Post
If you buy new plug wire, get 7mm copper core.
You'll have a hard time getting 8mm to fit.
Thank you!
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Re: Stumble at high RPM, popping, and cool header
  #18  
Old 02-16-2018, 11:49 PM
Tyboy11 Tyboy11 is offline
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Default Re: Stumble at high RPM, popping, and cool header

Got my 4 K & L carb kits part number WP-118-2879 and 4 ebay carb boots part number JKJ-28. Thats enough to tear into the carbs this weekend.

Looking forward to it!
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Re: Stumble at high RPM, popping, and cool header
  #19  
Old 02-17-2018, 07:16 PM
Tyboy11 Tyboy11 is offline
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Default Re: Stumble at high RPM, popping, and cool header

I went thru #3 and #4 carbs today.

These are my jet sizes. PAJ1 90, PAJ2 177.5, Main jet 152.5 all Mikuni stamped.

After I was done with those two, I pulled the jet needles out of the diaphragms to take a look. I noticed that there was one small washer under the spring. Does the stock configuration have one washer or did someone add this to richen it up? Should it just be the spring going on the plastic base at the needle?

I also learned that Purple Power will tarnish the chrome diaphragm covers. I had them in an ultrasonic with other parts. I was using Purple Power and water 50/50 mix. It turned them dark with streaks. Looks like shit.

One more thing: When I set my floats tomorrow, can I set the distance with them upside down, with the float resting on the valve or should it just be depressing the tit for the distance (not with the full weight of the float on it). I've seen two different ways on this forum.
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Re: Stumble at high RPM, popping, and cool header
  #20  
Old 02-17-2018, 10:12 PM
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Default Re: Stumble at high RPM, popping, and cool header

Post a pic of the needles themselves. it will be easy to see what has been done to the carbs (Mods done by the previous owner)

PAJ#2 SHOULD be 170, NOT 177.5. Double check that just to make certain.
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