Quick slip-on question

[Mudsurfer1234]

Hey guys, I'm looking at a pair of Arrow slip-ons for a 2000 M900ie.  If I only change the slip-ons, without doing any airbox mods or aftermarket air filter, do I need to do anything with the ECU or run a Power Commander or anything like that?

Thanks!

[Buckethead]

Nope.

Not bringing in enough extra air to warrant it.

Lots of good info HERE.

[Episteme]

I put an arrow full system (both mid-pipes and cans - not just slip-ons) on my old S2R 800 without a problem at all. No reflashing the ECU or PC solution required. Ran great and the sound and look was MUCH better than stock!

From what I remember of previous discussions on this issue - the only time you will need a new map is if you upgrade both ends of the "air pump" (aka, engine), the air filter AND the exhaust.  This gets rid of both bottle-necks in the air flow, and will very likely require a remapping of the ECU.  That's my interpretation based on memory - so hopefully others can confirm/correct me on this one.

[Mudsurfer1234]

Awesome.

Thanks for the quick replies, now I know what mod is next!

[Buckethead]

From what I remember of previous discussions on this issue - the only time you will need a new map is if you upgrade both ends of the "air pump" (aka, engine), the air filter AND the exhaust.  This gets rid of both bottle-necks in the air flow, and will very likely require a remapping of the ECU.  That's my interpretation based on memory - so hopefully others can confirm/correct me on this one.

Pretty much.

Uncorking the exhaust is fine as long as it's still breathing in through a straw.

Open up the intake and you'll need to do something to increase fueling or risk running dangerously lean.