Hi I was told by my local dealer that if I was to change the breather/Air Filter and the exhaust/ Slip ons on my 2009 1200 custom, that the fuel injection system would re-map itself after 2 or 3 short journeys?? does any one know if this is correct? as I was thinking of buying the ThunderMax EFI http://thunder-max.com/ once I had run the bike in properly!
All the best !

Hear is to all our Troops from all our Nations

 

Sporty-Uk,
While the ECM on your bike will compensate for some things, (IE ambient temp, load,
rpm, throttle position) It will not re-map itself. If you change just the exhaust, you will probably be ok. But if you change both the exhaust and the Air cleaner, you will probably be running too rich and risk the possability of "Holeing" (burning a hole) in a piston. Re-map your computer or get a fuel management system.
-Trib-

 

You've almost got it right, but changing to a high flow A/C will cause the bike to be too LEAN.

 

You have to do a down load to take care of more air from the new intake, and less backpressure from new exhaust. You can do one thing get a way with it, but not both.

 

I would look into that a little more your dealer just might be right. Infact there are a ton of post on this form about that very subject and plenty of info on the closed FI system that will support you dealer,if that is the only mods you do. However I think these bikes run to lean anyway but a remap from the dealer is not going to change the fuel to air ratio. You'll need some type of fuel management system or set ied's.

 

Should be fine. Ride it for a while and see what happens. You can add the Thunder max later if needed.

 

running rich will never hurt an engine...just performance...running lean can detonate (preignition) and burn a hole in the piston or smoke a valve

i don't know of any year EFI sporty that has a full on auto remap/learn

you change the pipes you'll be fine,but if you change the a/c you'll need a remap.

 

ok all so the general consensus is I will be ok to do the exhausts but not the air intake? and then if I need to upgrade the rest I would need to upgrade my fuel managment system! so my next question is
do harley do an upgrade so that I can do the remaping my self, or is there some software and a lead that I can buy to plug in and interact with my existing managment system?
thanks for all the replies

 

acctially running too rich can fuel wash the cylinder walls and destroy the rings. fyi

 

well,you're right,but unless he has an injector stuck wide open it'd be hard to do with a stock ecm