WR450F Query

[n000b3rt]

WR450F
Since putting an FMF Powercore muffler on the bike, it has become hard to start and backfires slightly. Is this normal or do I need to change the powertune to correct it? If so, what is recommended to change it to?

[AtomicGeo]

Couple of questions:

 

1.) Did you remove the air intake snorkle yet?

2.) Did you install the race ECU module?

[guru]

Assuming it is a FI (2012 and up) model, did you swap out the ECU and is your idle at 2000+/- ? Search for CO settings or starting problems/issues. Many here bumped up CO settings. I'm at 10 with the powercore and that fixed the extremely annoying starting situation. Good luck.

[n000b3rt]

@AtomicGeo

1) No we didn't remove the snorkel

2) Are they parts of the off road kit for the WRs?

@guru

Thank you heaps, I'll keep you's posted ? thank you to you both

Edited December 25, 2014 by n000b3rt

[AtomicGeo]

Remove the snorkle.  Then if you have the programmable ECU, have it programmed or buyt the power tuner to program it.  It's going to be extremely lean otherwise.

[Juman5]

It will still be lean at idle unless you get your hands on a FI diagnostic Tool and change the A/F mix.

[n000b3rt]

I think we can do that with the power tune, we're addressing it as we speak, we'll keep you guys posted