Question about 2008 Harley Davidson FLHRC Road King Classic

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INSTALLED REINHARTS TWO INTO TWO MINUS THE BAFFELS AND REPLACED WITH A PAIR OF BIG CITY THUNDER BAFFELS INSTALLED A HEAVEY BREATHER AND A VANCE AND HINES FUEL PAK WOULD LIKE TO KNOW THE CORRECT DOWNLOAD SEQUNCE ON THE FUEL PAK

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Honestly the best way to do it is t get the bike on a Dynomometer and have it adjusted that way to assure your HC (hydrocarbons) are in the 14.4 range, plus they can make sure you are getting the maximum horsepower out of all the money you put in to it.
Typically for the cost effective way is to get the disc or go to VH's website and see if you can download a map from there, but sometimes these can get you close, but not optimum.

Posted on Feb 16, 2010

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Posted on Jan 02, 2017

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1 Answer

Diagnostic code of PO577 on a 2010 FLHX


Hi Anonymous, for more information about your question please visit the website below. Good luck and have nice day.
Harley Diagnostic Codes 04 to Present

Jun 06, 2012 | 2010 Harley Davidson FLHX Street Glide

1 Answer

Back fire with vance hines pipes


Sounds like it is running lean. The ECM must be remapped for a performance breather and/or free flowing pipes. I would use H-D Super Tuner or have a dealer do a digital download to remap the ECM properly for the changes you have obviously made. You may do great harm to your engine if you run it without the mapping change as the VE will be changed and the ECM doe not know what is physically going on with VE if it is not mapped into the ECM

Mar 26, 2012 | 2001 Harley Davidson FLHRCI Road King...

1 Answer

Whats the best after market slip on pipe for both power increase and a nice sound...i have been looking at a very reasonably priced Vance and Hines S4 for just $249?


Vance and hines is always a good choice of pipe, the nice thing about vance and hines is that you can back out the hex bolts on the back of the muffler and repack it when it gets old, or unpack it if you want it louader. Makes it quite tunable. I had a vance and hines 4-1 on my CBR 1000 and I was very satified. The price you are mentioned is good too. The V&E I had on my bike had a good sound at idle and rev and sounded awesome when I tached the bike up.

Apr 09, 2010 | 2004 Yamaha YZF 600 R thunder cat

1 Answer

Mikuni jetting


If it's the Sreamin' Eagle Mikuni, it should come jetted close enough to take your bike to someone with an exhaust gas analyzer. That's the best way to get your card jetted correctly with the extensive amount of changes that you have made on this bike. I would advise that you take the bike to someone that has a dynometer that is equipped with an EGA and have the run the bike up. I would not want the mixture to exceed 14:1 at any time and preferrably run about 13.5:1. It's a bit on the rich side but it will help keep your engine running cooler. I've installed the carbs before but I cannot remember what jets they had in them. Sorry. Good Luck.

Jan 21, 2010 | 2003 Harley Davidson FLSTF Fat boy

1 Answer

How do i remove the baffels for samson fishtail


The fishtail tips would have to be removable to get to the baffels. And some of the baffels are not removable. i would call Samson and ask one of there tech's.

Oct 30, 2009 | 2005 Harley Davidson FLSTN- FLSTNI Softail...

1 Answer

I had to replace the baffels in my stage 1 swept exhaust. There is a little poping between shifting and down shifting, how can I stop this? The baffels I installed were made by Big City Thunder QQ1994....


Your probably running too rich. The fuel not being burned in the motor sometimes burns up in the exhaust.

I had the same problem with my 03 Vegas when I knocked out the baffels on my Stage 1 kit. I took it to the dealership and they increased the airflow into the intake.

It still runs a little rich, but better too rich that too lean. Mine still pops a little bit, I guess its just the nature of the beast.

If increasing the airflow doesn't do the trick, your going to have to get some more back pressure inside that exhaust, i.e. different baffels that are more restrictive.

Good Luck. Let me know how it goes for ya.

Jun 18, 2009 | 2007 Victory Vegas Jackpot

1 Answer

Put in Big City thunder baffles,but bike don't start up as quick


You might. Changing the exhaust could cause the engine to go lean or rich. Check your spark plugs. Black is rich, bone white with an EXTREMELY light gray (or clean) ring where the threads end is too lean.

Apr 28, 2009 | 2002 Harley Davidson FLHRCI Road King...

1 Answer

Just installed vance and hines big shots on my 2008 dyna super glide custom. Soon to put aftermarket air breather. Dont know whether to spend the $ on a power commander, V & H fuel pac, or just do the...


all three will give you amazing results i have the power commander and it set my maps perfect with long shots an screaming eagle air cleaner on 2003 heritige softail noticeable difference in sound -idling= start up - drivability -and performance even better gas mileage

Mar 14, 2009 | Harley Davidson FXD Dyna Super Glide...

2 Answers

Question about Vance and Hines quiet baffles


about 3-5db but you must remember db is not a linear scale but logirythmic. basicallyy the baffles will remove the harsh rasp off the pipe and make them deep in sound, when cold they will be as loud as normal but once they have some heat in them they quieten down

Nov 20, 2008 | 2003 Harley Davidson XL 883 R Sportster

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