This is exactly what a "how to" should be! EXCELLENT ! After 6 months of waiting finally got an Q4 pipe...Can't wait to get started on this !!! THANKS GUYS!! Definitely will make the job easier !!!!

Thanks guys. I was actually trying to reinstall the whole thing back to stock (exhaust was way too loud) and this was easily the best video I'd watched on it. Between this video and the manual it was very easy. Thanks!

Thank you for an excellent demonstration and how to do this job. I watched several how to videos before I started, but yours was the best that I found. I chose to go with the Yoshimura slip on Exhaust and the Dyno Jet Power Commander 6 fuel controller. Your demonstration showed me that I could do this modification. Keep up the good work. Thanks

Great video my man. I've been looking for this for a while. Snatched up a 2020 wr last year. Will be doing everything you showed on here. Keep it up.

Very good video. Great detail. Thank you. I'm mod'ing this weekend with a yoshi, ejk, exup-elim. Great idea on the foam at the flapper.

Great vid, especially the close ups. I managed to score a new FMF plus the megabomb off eBay. Did all these mods in about 3hrs, and it makes a great bike even better. Only pain was uncabling the exup. Left flapper stock

Great Vid! Best explanation of mods install I have seen yet. Kudos!

Perfect video. Step by step was easy to follow. Doing all this plus the powerbomb header on my 2015 WR250R

Yeah, I did the same stuff on my 2011 X I still love the bike bought it new

The flapper mod isn't done properly. He blocked off the airflow created by removing the valve and taping down the door. It doesn't sound like he plugged it with the foam just for the video since he said he keeps the foam in there to keep out dirt...he'll succeed in keeping out air and choking it off, also.

wow very detailed video great job

I have that same exhaust and a tuner on one of my WRs. I agree completely, smoother and more responsive power delivery, and louder. Additional power? Meh...maybe, but whatever, it has enough anyway for the dirt. The brap is great, but original stock quiet is nice also. Oh hey we went to Tahuya finally a few days ago and didn't really enjoy it for all the round rock and gravel everywhere (plus cranky from all the heat). Funny enough had a bike break there also---fuse blew and would not allow the starter to turn. Fortunately we didn't have to tow it back LOL. Much prefer Capitol Forest for dirt riding over SlickRock-huya.

Superb video. Thanx for the content!!

Hi. Again, where did you get you emulator? My Yamaha is 2020 WR250R I been looking places no one please.

I also have a WR250R. Have you had the bike dynoed after all of that was done to it? I just bought new rims, sprockets, and a chain for mine.

I found it easier to remove the little bracket for the side pannel

Well done! Great tutorial

Was there a gasket on the stock pipe?..I did not see one in the video. I am atempting to go back to stock. I am a bit concerned without the AIS I will have introduced backfire popping to the stock muffler> Of note, there was a treaded clip on the FMF when I took it apart. I would think that would be suppied as the FMF muffler did not have a threaded connection. your aftermarket muffler sounds not as loud as the one Im replacing. I would leave the one Im trying to replace if it sounded like yours.

Quality vid

Thank you so much for sharing! I am looking to buy the exhaust but can't find one. Where did you get yours? As well, do you have any suggestions about what to start with? EJK unit or FMF first?

Great video, as always! Is he still using the same settings on the EJK? Thanks

thats probably not the way this torque wrench was intended to use :D

I just bought a wr250x. Previous owner(s) already did all these mods to it. I was wondering what the block off plate was for by the exhaust port lol. They also did the mechanical cam chain tensioner mod and also added a speedohealer.

I wish I could get a FMF for my bike, they are sold out all over the place.

Great video! A question: What size was the replacement bolt you had to purchase from the hardware store? My fmf pipe arrives in 2 weeks so I'm getting prepared. Cheers!

Hi! Thank you for the video and information. I did just replace my exhaust for a FMF I finished but now my engine light is on. What could be please need help. Thanks. I don’t have the emulation I need to buy it.

after watching this video i decided to keep my stock exhaust.

I just installed exactly the same mods on my 2009. I'm finding when riding if u let go of the throttle and quickly get back on it the bike has a bad hesitation. Can I remedy this with my ejk controller? Any tips.? Thanks

Hi What brand is your headlight?

I’ve heard mixed reviews about the ejk. Is it still working good? I was thinking about going with altitude industries but they are really bad with customer service. The altitude industries programmer is the same as the fmf programer. Thanks for the upload.

Who know the manufacturer of the head of fork ?

Why go through all that trouble just get a yz250f the cross country version and just add street kit

Where did you buy the emulator? Please can’t find me anywhere. Thank you. Anyone here on the chat can help me out. I will appreciate it. Thank you.

Do you have any difference between EJK and POWER COMMANDER PC?

Do you think it’s is necessary to get the ECU/EJK? I just installed my q4 and my bike is idiling higher than normal so I’m concerned

Where did you buy the Exhaust.

How have these mods changed the mpg?

My 2020 wr250r has a little can next to the flapper...what is that for

Too bad the FMF exhaust for the WR250R are non existent these days

Take that foam and put it to your mouth and try to breathe through it. It isn’t going to flow any air.

What a nightmare, I should've spent the money and not got a bike that's basically unrideable unless you throw thousands at it!😢

Good vid. I have same bike and did the same mods but I read the flapper helps with low end torque so I left it in and she runs pretty strong. What are your thoughts? kzfaq.info/get/bejne/p9ilgJVlrszWp2g.html

this is way too much lol not worth it

With mods like that, you'll be going 30 instead of 25. Slow down speed racer!