2013 WR450 - Programming for FMF?

Just bought a 2013, and I have a couple of questions that the dealer could not answer.  When you put the GYTR (FMF) muffler on, is it necessary to change out the ECU at that point and remap?  If the answer is "yes", then do I need the Power Tuner or can the dealer do this with his EFI Controller?  The dealer does NOT have the Power Tuner.  If needed, I would have to buy one.

 

Does the dealer have to reprogram the air/fuel idle mixture for the FMF pipe?

 

Thanks in advance.

Edited by Navaho6

If you buy the GYTR kit, you get a mapping tool, Competition CDI, throttle stop change kit, and the FMF pipe.

Same muffler and EFI Programmer can be purchased on ebay and Rockymountainatv for much less than what the dealer charges  Rockymtn sells the tuner for $230.  Dealer wants $280.  I got the FMF for $260.  Dealer wants $300.  The Competition Kit includes only the programmable ECU and YZ throttle stop. Those two parts are on the way.

 

I may get a tuner eventually but for now, all I want to do is install the muffler and go riding.  I'm just wondering if the bike will run properly without reprogamming after the muffler swap.

Same muffler and EFI Programmer can be purchased on ebay and Rockymountainatv for much less than what the dealer charges  Rockymtn sells the tuner for $230.  Dealer wants $280.  I got the FMF for $260.  Dealer wants $300.  The Competition Kit includes only the programmable ECU and YZ throttle stop. Those two parts are on the way.

 

I may get a tuner eventually but for now, all I want to do is install the muffler and go riding.  I'm just wondering if the bike will run properly without reprogamming after the muffler swap.

The bike will run a little lean without the reprogramming.

You need to change out the ECU to the Comp ECU. The stock ECU is tuned so that it can be EPA and CARB green sticker very lean. And you cannot program the stock ECU. The Comp ECU's base map is much better than stock but still needs remapping. The screw is just to block the hole, its not like (or) the YZ screw. On the FI bikes there is a hard stop casted inside the body. Putting on the FMF will lean it out even more. You should get the GYTR programer. Start with the FMF map and go from there. I would also bump the CO level to 10 to 15. This is about the same as going up two pilot jets sizes.

 

After doing so you will not believe how much power you have on tap. 

Thanks. That's what I needed to know, guys.  Got everything on order.   Looking forward to the first ride.  I've ridden the '12 WR a couple of times but it was completely stock.  Felt like a 400 cc motor.

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