Slipons and KN Air filter without any EFI mods

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Feb 1, 2015 | 12:48 PM

Nikolaiownz

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Joined: Oct 2013

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From: Denmark

Slipons and KN Air filter without any EFI mods

So i bought my fxdb 1 years ago and was told it had PC installed.

I drove like 10000 km last year on it and this winter i discovered that there was no efi module or anything on it.

I can read that this is bad for my engine so is there anything i should check when i am doing my next service before the season starts.

ps. i had little to no truble with the bike last year - only some low idle when warm from time to time.

Cheers

Feb 1, 2015 | 01:00 PM

bdtaylor1979

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From: Garland, TX

If you still have the stock intake with the k&n and slip ons you should be fine. If you have a stage 1 intake then you will possibly need to add more fuel. If you aren't planning on doing any internal engine mods I would go with a set of xieds from http://sales.nightrider.com/
I've had them on 2 bikes and they work great.

Feb 1, 2015 | 01:10 PM

Nikolaiownz

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From: Denmark

I have the stock intake with a K&N air filter inside.. i replaced it because the one that was in when i bought the bike was all messed up and in a really bad shape.

Ok thanks.. i will check it out!

Feb 1, 2015 | 03:15 PM

bdtaylor1979

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From: Garland, TX

Quote:

Originally Posted by Nikolaiownz

I have the stock intake with a K&N air filter inside.. i replaced it because the one that was in when i bought the bike was all messed up and in a really bad shape.

Ok thanks.. i will check it out!

Your welcome. My dad has a 09 ultra with vance & hines slip ons and a k&n inside the stock intake with no fuel managment and it runs great. I think the only time you have to worry about a tuner is when you put a more open intake on.

Feb 2, 2015 | 05:00 AM

Warp Factor

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Joined: Aug 2012

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From: Detroit

Even if you don't see a module, the computer may still have been re-programmed.

However, lots of people run freer-flowing intake and exhaust successfully (including me) without any tuning changes or module. The computer will self-adjust to some extent.

Feb 2, 2015 | 09:50 AM

Thingfish

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Joined: Jun 2010

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From: coast to coast

Your stock EFI will adapt quite a bit, but it will still be constrained to lean parameters even with a dealer flash. EPA keeps it that way. So while it runs "OK" without anything else, it will run far better with XIEDs or a proper tuner module that can increase the fuel to air mixture. Lean is not the best condition for any bike to operate in. For $100 you might just chuck some XIEDs on there. Takes about 10 minutes and a few zip ties. Super simple. Or spend a bit more and get a real tuner, especially if you have motor mods in your future.

Feb 2, 2015 | 01:30 PM

DK Custom - ST

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From: Red Banks, MS

Quote:

Originally Posted by Nikolaiownz

You should be fine. However, if you choose to do any mods you may need some type of fuel management. Below is a link on EFI Options where you may find some good information as well.
https://www.hdforums.com/forum/ignit...uning-etc.html

Kelsey

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