I did not have good luck with the midpipe. My '06 S2R popped like hell on decel with it installed. I'm told the popping is a sign of lean fuel/air mixture (result of less back pressure from the modified exhaust system) and over time this can affect (shorten) life of your valve guides. This seems like sound reasoning but I confess I'm no expert. The dealer suggested installing a Power Commander III which was about $600 with configuration / mapping at the time. I didn't want to spend that much and took a pass. I've been running Arrow slip ons only and it runs great with no popping.I have arrow slip ons with the cat, just got a mid pipe and was wondering if i will need to get a new ecu and tune if i get rid of the udder?. my guess it'll run fine, anyone else do this, i dont have any airbox mods. its on a s2r800
If you speak to Jeff at MonsterParts he will recommend a FATDUC O2 Manipulator. This will richen the mixture at the low end.yea thats what i was afraid of, down the line I am planning on a powercommander/airbox and such but as of now just wanted to see if it can work with just the midpipe. i try it out anyways for a bit, run it for a week or so and then if it's giving me hell then ill just take it off and save it for the future.
A friend installed the FatDuck on his Sport Classic and it helped eliminate a low end hesitation. He's running stock exhaust system.yup, im looking into that as well, so far the best bang for the buck, did some searching yesterday and it seems that fatduc is the way to go.