Question about 2011 Harley Davidson FLSTFB Fat Boy Special

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Do u need to dyno tune when u replace exhaust with vance and hines 2 in 2 big radius

Posted by Anonymous on

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  • Harley Davidson Master
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Hi Anonymous, don't waste your money. Have nice day.

Posted on Jun 23, 2015

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 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

Posted on Nov 20, 2008

Mitchy123
  • 216 Answers

SOURCE: Vance and Hines

Whenever I have a question about an aftermarket part - I contact the manufacturer, they are very helpful, but to answer your question, In general, if u get the correct part for your model bike, it should mount the same as the OEM part you;re replacing

Posted on Jan 25, 2009

  • 73 Answers

SOURCE: just installed vance and hines big shots on my

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

Posted on Mar 14, 2009

wd4ity
  • 4565 Answers

SOURCE: Hello, My 2011 fatboy lo runs very hot. I have

There's hot and there's too hot. Heat is one of the factors that shorten the life of an engine, especially an air cooled engine. You bike is equipped with the oil jets that help cool the pistons. If it were my bike, I'd take the bike to a known good high performance shop that had a dynometer, an exhaust gas analyzer, and a good mechanic that knew what he was doing with both the bike and the dyno. I'd have them run the bike up through the RPM range and check the fuel-air mixture ratio at various rpm levels. If the bike is running too lean, it'll run hot. Lean is mean but too lean is bad. The mechanic may can richen the mixture up just a bit, say from 14.2:1 to 13.7:1 and reduce the heat while maintaining the performance you want. It's worth a try.

Good luck
Steve

Posted on Jun 01, 2011

mxtras
  • 194 Answers

SOURCE: overwhelming heat coming from the

I think replacing the exhaust will help, but it's an air cooled engine - they get fricking HOT! It's a very common issue with Harleys -just as it was with VWs back in the day. Replacing the exhaust will not void the warranty but it's not going to make a noticable difference - it may drop the temp a few degrees, but hot is hot. Your dealer might try to pull that "warranty is void" ****, but don't cave in - they are bluffing. They cannot void the warranty for this. Everyone changes their exhaust. If they persist, contact customer satisfaction and choose a different dealer.

You might look into putting a parade fan on - the bigger, the better. There are several to choose from and they help a great deal.

Also - Kuryakyn makes lexan heat shields which do help.

Posted on Jun 01, 2011

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Hi Toby, you might want to give the nice folks at Vance and Hines a call I'm sure they will be happy to address your issues. Good luck and have nice day.

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It has a vance & hines fuel pack, vance & hines big radius exhaust..k&n air, s/s cams..for 2 yrs..running great til..2 months ago..start bike in a couple of min..it turs off..the start it about...


Hi Litebeer_99, and the usual suspects are:
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Hello, My 2011 fatboy lo runs very hot. I have Vance and Hines big radius and screamin eagle stage one kit. It runs hot but it runs awsome. i wanted to put an oil cooler on the bike but was told to leave...


There's hot and there's too hot. Heat is one of the factors that shorten the life of an engine, especially an air cooled engine. You bike is equipped with the oil jets that help cool the pistons. If it were my bike, I'd take the bike to a known good high performance shop that had a dynometer, an exhaust gas analyzer, and a good mechanic that knew what he was doing with both the bike and the dyno. I'd have them run the bike up through the RPM range and check the fuel-air mixture ratio at various rpm levels. If the bike is running too lean, it'll run hot. Lean is mean but too lean is bad. The mechanic may can richen the mixture up just a bit, say from 14.2:1 to 13.7:1 and reduce the heat while maintaining the performance you want. It's worth a try.

Good luck
Steve

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1 Answer

Hard to start when hot


It sounds like you fuel map is wrong. Motorcycle are extremely sensitive to any changes you make in the intake or exhaust system. Sounds like you need to take your bike and have it put on a dyno to figure out the new map for your fuel. I'm not familiar with the the Vance & Hines fuel pack. Sorry I couldn't be of more help, Good Luck, Steve

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If you send them a request for the map, they will usually make one for your model and description. They aren't that big of a company. They have 3 dynos, and 1 - 2 techs that actually make the maps. If not I would look for a map with the V&H big radius or staggered drags.

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Have a2008 fatboy put on a set of big radius when letting go of thrortle it pops what causes it to do that


decel pop is caused by a lot of things! if you have big pipes; ie:drag you need baffles to tune the exhaust wave; theoretically upon decel instead of exhausting you are actually allowing reversion- which allows exhaust to actually renter your engine and try to get compressed again; very bad for performance, etc big pipes are cool but need proper baffling and tunage to be useful; may be too lean possible fix w/ supertuner/ dyno runs; I like "lollipop" baffles you can make for under 5 bucks and tune as you need; thats what I run on my 95HP sporty; Have Rinehart true duals on my Road King and via ecm tuning you can really dial it in. F/I is great but you need to "pay to play" no quick fixes like in the carb days; really need a dyno or some sort of computer tuning capability; I recommend Super Tuner rather than the piggyback setups; more expensive at first but wont fry your ecm either. A good dealership will be able to tune it right the first time in under an hour...sorry for the lenghly reply but I see this question all the time...T

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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

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