When to remap the ECU?

howdy,
I've had my bikes exhaust debaffled and have installed a K&N filter and
open airbox top. I keep hearing conflicting suggestions on weather I should
now have my ECU re-mapped due to a risk of running lean.
a) Should those changes warrant an ECU re-maaping?
b) Is there a low cost test to determine weather I need my bikes ECU
re-mapped?

cheers
Idej

 

Yes

Yes

HTH

JL

 

ditto what the man sayz.

What bike is this for?

 

You can get those spark plug extensions that have an opaque window in them.
Depending on the colour of the spark, I believe it tells you if your bike is
running lean or not. Obviously this can only be measured when the bike is
not under load as you need to be standing down near the engine to observe
this happening.

Unfortunately this means that whilst your mixture may be good while the bike
isn't under load, the conditions may change whilst it is, but you won't
know.

Thoughts anyone?

Adam

 

If you've spent the money already, spend a little more and get yourself a
power commander and a good remap. You won't know yourself after it.
Properly done they help an absolute shitload, not only with power/torque
but also driveability, smoothness and fuel range, especially in the city
riding modes.

Cam
'00 ZX6R

 

thanks all. the bike is 2001 900SS i.e

 

Called Colourtune and yes they can be a good way to ensure a good
mixture on carbed vehicles

JL

 

Alright, I'll be helpful instead of mean:

If you change the amount of air that the engine can flow it will
change the fuel mixture (air /fuel ratio), hence you need to readjust
the fuel flow - on a carbed bike you would rejet, on an efi you need
to remap the settings (in the absence of a closed loop system via an
O2(lambda) sensor)

Most common way to do this is with an aftermarket module such as a
power commander

You can check the current fuel mixture status either with a lambda
sensor in the header or most dyno tuners have tailpipe sniffers which
do the same thing

JL