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Discussion Starter · #1 ·
I recently bought my first VTX and it already had the Kuryakyn Hypercharger pro series along with vance & hines big shot pipes. Now my question is do i need to change anything on it cause when i put in 89 fuel it will remind me of the insurance comercial when the guy rides up with his bike and it sound like a weedeater but when i put in 93 it sound like a muslce car after the 89 is flushed out. I am not sure if this is normal and i have been trying to find out if I need to do something to my carb or something else and yes i have put marvel mystery in it to see if there was anything cause it will pop alot while down shifting. thank yall for you input. also this is my bike i do love it.

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First;

Welcome to the board!
Bookmark or save to your favorites folder, these websites, http://www.vtxoa.com/forums/forumdisplay.php?f=77
This is the NEW VTXOA Garage, a sister site to this message board and contains all your How-to/Tips/Tricks/Why’s and links to other helpful sites for your new VTX. http://tech.bareasschoppers.com/ A fellow VTX Riders site that has many write-ups on “How-To” do work on the VTX. Also, for you 1300 guys http://vtx1300tips.com/VTX1300TIPS.htm another fellow VTX Riders site.
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Next, your Honda was designed to run on the lowest octane available, not premium. Your VTX will run much better and get better mileage on 87 octane. Remember, "Premium" doesn't always mean "Best".

Read this from the "How To;Step-by-Step" board for more on why you only need 87;
http://www.vtxoa.com/forums/showthread.php?205943-What-Octane-Gas-in-the-VTX-By-Tapper


Last, you should probably tune the carb by adding jets to it when you swap out the pipes and airbox. It will want a little more fuel for a better air/fuel mix to burn
 

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Discussion Starter · #4 ·
Thank you and what type of jets should i use i am not sure if the previous owner changed the jets since i bought it at Honda of Norfolk. Also why does the manual read 91 but alot of people say 87 you should put in.
 

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Thank you and what type of jets should i use i am not sure if the previous owner changed the jets since i bought it at Honda of Norfolk. Also why does the manual read 91 but alot of people say 87 you should put in.
Which manual is that? My owner's manual for my 2007 actually states 86 octane... minimum around here is 87.

As for the jets, how's it feel? Any hesitations or flat spots in acceleration? Perhaps check the plugs after a ride to get some indication of lean/rich running conditions. If they look good, and the power band feels good, it may already be dialed in.

It is possible to check the jets that are in there and see if they have numbers stamped in them, for peace of mind and to satisfy curiosity.
 

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Discussion Starter · #7 ·
Thank yall so much i never knew that about the fuel and i do apologize the 91 was on my fender not the manual. This is helping me out alot. another question does anyone know why at 70MPH the bike will start to feel like it i loose power than regain it?
 

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Welcome to the VTXOA from the southeast corner of NC.

For the popping you might want to see if the pair valve was removed when the pipes were installed, or posibly loose pipes at the head.
 

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Welcome to the VTXOA from the southeast corner of NC.

For the popping you might want to see if the pair valve was removed when the pipes were installed, or posibly loose pipes at the head.
If you are getting popping as you call it then you need to add a flat washer under each (4) acorn nuts Lon the exhaust. Ther is a common problem with the acorn nuts bottoming out befor becomming tight and you end up sucking air there. Par valve do not cause decel popping contrary to what people say at least thats my evaluation over the years.
caution be carefull not to break the exhaust studs off while tightening them and do not try to just tighten them - add the flat washer as it takes up the space so the acorn nut will tighten down.

Doug
 

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If you are getting popping as you call it then you need to add a flat washer under each (4) acorn nuts Lon the exhaust. Ther is a common problem with the acorn nuts bottoming out befor becomming tight and you end up sucking air there. Par valve do not cause decel popping contrary to what people say at least thats my evaluation over the years.
caution be carefull not to break the exhaust studs off while tightening them and do not try to just tighten them - add the flat washer as it takes up the space so the acorn nut will tighten down.

Doug
FYI,

I have stock exhaust, no airflow or carb mods on my '08 1300R. My bike would pop periodically on deceleration. I did the pair valve mod and do not have this anymore. I am planning to do a decap, pipes and jetting.
 
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