FMF EFI Programmer Question

Ok, I put an FMF Q4 Exhaust and Fuel programmer on my WR250X, I cannot ride it yet because its snowing here, but I noticed in the garage, the throttle response does not seem linear anymore, exactly at 3500rpm it jumps to 4500rpm. I'm guessing this is where the servo would spin the flap in the exhaust valve of the OEM exhaust open or close. does anyone else feel a power burst at around 3500 rpm, where the throttle response does not seem linear anymore? I'm thinking this is going to screw me up bad, I need good linear control of the throttle from 2500 to 4500rpm, that's exactly where I run m y RPM's in a circle, etc. If this is going to be a problem I may have a BRAND NEW FMF fuel programmer for sale, and I'll go buy the Power Commander. Thing is I liked the FMF programmer because it was closed loop, where I believe the Power Commander is open loop unless you weld one of their sensors on your exhaust. I'm assuming those things, I have not looked into that in detail yet.

I wouldn't sweat it until you take it out for a good, long ride and see how it runs once warmed to full temperature.

I've ridden my WR-250R both with and without both a PClll and an FMF Power Programmer. Either is a very big improvement over stock fueling.

I don't feel that riding mine. That's the worst thing about winter, having to wait on the weather to try out mods.

Sarah