Quote:

If you change the pipes (or anything else) on a bike withe EFI, will you need a computer to re-map?

Soren



i have a harley 883 custom at present. Several blokes on the xl forum have changed pipes without adverse or any reaction from having too lean a mixture. changin air filter will allow more air in which depending on how crude the ecu is (and a harley is very crude) then you will get problems with lean mixtures and very hot cylinders etc. Also the o2 sensors will prob be naroow band and only lean the mixture at certain rpms and throttle positions. hope this helps