Question about Harley Davidson FLSTF - FLSTFI Fat Boy Motorcycles

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Im trying to find the proper spike air cleaner to fit my 2001 fatboy, but i do not know what style carb it has. was just wondering how to find out what i need

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The original carb for the '01 Fatboy was the Keihen CV carb. There are several aftermarket carbs available but if your bike is basically stock in reference to the induction system, the bike has the Keihen carb. Look on the side of the carb, you'll have to take the air filter backing plate off to see the side of the carb.

Good luck

Posted on Dec 29, 2010


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My harley fatboy 1340 has started runing rich after i changed the air filter

If the air filter is not obstructed and is properly oiled, then it should perform adequately. If not, try using the original filter. If the problem still exists, you will need to adjust the fuel/air mixture screw. Do not forget, there are 2 other adjustments... idle and an adjustment to the diafram when you blip the throttle.
I can give instruction on how to adjust, but you should look that up yourself on the website of the carb maker.

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2002 fatboy with oil in the air filter

Hi Anonymous, oil leaking from your air cleaner is caused by oil carryover from the engine. For what ever reason the breather system is not seperating enough oil mist and air from the piston downstroke. There are cheap and quick easy fixes and there are more exspensive ones. Start by trying the following:
1. Run your oil level half way between the add and full mark when hot.
2. Run oil breather lines from head into a TEE fitting below carb/induction module then a single line into a mini filter under frame.
3. Purchase Arlen Ness Super Sucker.
4. Replace umbrella valves and realign oil pump
5. Upgrade oil pump and cam plate
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1 Answer

I own a 1997 fatboy 1340 evo with 26,000 miles on it,, i have straight pipes no baffles and a nice custom air cleaner and a screaming eagle power comander under the seat,bikes been running fine for a year...

that maybe part of it but the carb needs ajustin and cleanin--backfire is from a rich condition-so the float level can be wrong or the jets have issue--also make sure ur gitten proper spark voltage cause if low then not all gas is burned

Jul 21, 2011 | Harley Davidson FLSTF Fat boy Motorcycles

1 Answer

My 2001 Valkrie 1500 has a miss when running at steady highway speed. It does not miss when giving it gas. I was wondering about the fuel filter.

The Valkyrie has 6 carbs and it sounds like one of the carbs is not working properly. When you give it the gas it uses different jets to load the carbs. at cruising speed it may not be pushing enough fuel on all 6 to keep up or one is plugged. First try some Sea Foam or Tecron Fuel system cleaner through the fuel tank and see if that clears it up. If not I would suggest a carb cleaning to get it done.

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I do not have a tool to fit the needle valves (2) on this carb.? Is there a generic?

I am going to assume you want to adjust the carb. The manufactures make it difficult for you to do this because:
The carbs are preset from the factory to give the best performance and best EPA (emissions)
You can get carb adjusting tools from amazon and other sources. Just do a search for that term.
Before you adjust the carb I suggest you clean the fuel system. Remove the air cleaner and shroud around the carb and spray the carb down with carb cleaner. If you have an air cleaner, replace it. If it is a foam style clean it with Dawn dish detergent. Add fuel stabilizer to your gas/oil mix or 1 oz of Sea Foam brand carb treatment to a gallon of gas/oil mix.
A good cleaning is probably all you need and adjusting the carb will make matters worse.

Jan 05, 2011 | Garden

1 Answer

Was wondering about spike air filter the one i want to buy says its for a cv carb delphi. dont understand the delphi part of the description because im just looking for it to fit my stock cv carb on my...

Delphi is referencing to a type of fuel injection system that Harley uses. They've used two type and Delphi is one of them. I can't remember the other one but I believe it was an earlier unit. I know nothing about Harley's fuel injection. Sounds like the filter will fit either a carburated engine or a fuel injected engine.

Good Luck

Dec 29, 2010 | Harley Davidson FLSTF - FLSTFI Fat Boy...

2 Answers

2003 HD Fatboy has a miss. New plugs and wires.

i take it its carb. after it warms up to operating temps does it stop the sputtering? thats just a HD CV carb doing what it does til hot. Im not talking a 2 min warm up and off u go im talking operating temps of 200 plus. Is the carb an S&S? Your going to have high rpms til the temp kicks it down if its injected

Oct 04, 2009 | Harley Davidson Harley-Davidson Motorcycle...

1 Answer

Carb ploblem

sounds like you have a new style holley carb it is the only one thats fits that discription (s&s used to have one also, but discontinued it years ago.) you might try adjusting the accelerator pump so it squirts less gas in the engine apon accerellating that is the biggest culprit when you see carbon(black soot) in the carb you said you think it is jetting did you buy the bike used? if so ask the old owner what jets were installed and does he have any other jets if you can.

Jan 18, 2009 | 2001 Harley Davidson FLSTF - FLSTFI Fat...

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