I bought my 2014 450x new and it was super lean out of the box and was hard to start cold.header pipe would glow red.I just wanted my bike to run good but basically stock for reliability reasons and they have plenty of power as is(for me at least).After asking a bunch of mechanics and reading online this is what I did.I removed the smog pump,made the block off plate on the head out of 1/4" aluminum plate and plugged the airbox and other holes with bolts I had.I made the airbox plug from a bolt with electrical tape wraped around it until it was the right diameter.Then I bought the same dial a jet as the one in this video.My 2014 model had a plug fused in the carb body that I had to drill out carefully to install the dial a jet but I managed with a dewalt cordless drill and some patience.no jet kit,stock exhaust and certainly didnt destroy my airbox(I ride thru rivers and mud constantly).These 2 things corrected my air fuel mixture and made for easier start ups,more power and smoother throttle response.Dial a jet cost $30 something dollars and the smog pump delete cost $0. Hopefully my 5 minutes writing this will help someone lol. Save your money for back tires and learn to ride better cause we all know its mostly the rider and not the machine.

the guy that did the carb is awesome at it !! thanks Jay

I have had Multiple 05 450x. No need to cut and destroy the air box, just pull off the top cover snorkel. 2nd on the pink wire mod above the connector is a blank empty hole, pull the pink wire out put the pink wire in the empty hole and put the rubber grommet where the pink wire mod was, that way the wire is not cut. Jetting is a good idea too I just do a 45 pilot and a 165 main. and then I pull the baffle out of the exhaust cut and re insert the end to open it up too,

Amazing vid glad I watched it learned alot!

I have just completed all these mods to my CRF 450x 2005 including the jetting . Then took the bike out for a 3 day 600 Km Advanve ride. It was like riding a totally different bike, more responsive quicker

I have an 06 450x and it is really good for open stuff. In the slow stuff not so much because it stalls easily and no hydro clutch. It is a quite violent power delivery compared to my ktm xcw450 2009. It is a very solid bike start right up every time and does not over heat ( ktm does). I have put a tubliss with a trial cheater tire in the back at 10 psi and now it is plush and grippy. Only issue is it is sometimes hard to shift into 4-5. I ride mostly 2-3. Any reason why ?

I'm at sea level and I ran a 180 main jet and it made a huge difference over the 160 I had changed out the first time I pulled my carb. If your at sea level or low altitude I highly recommend a jet between 178 - 182

Great info. Thanks

The CRF 450 X 05 air box is different to the 06 . On the 05 the battery tray is mounted n the top section that you cut out. Where was the battery tray on the 06 bike you used in the video?

It's off its head now lol holy shit done the airbox cut out and full exhaust cut wire now she's an animal

That other bowl isn't ruined. Just dab the trashed leak with solder, works just as good as a smaller leak. No, it doesn't flame out either.

Great easy to follow vid. Cut my air box today and put a fresh plug in my 06 450x. Haven't got to the carb yet.......but will before I ride it again. The air box cut must really let a lot more air in. I fired my bike up and noticed the header pipe glowing red, so it's for sure running lean now lol. Not sure if I'm comfortable tackling the carb myself or just take it to the honda shop.

Don’t cut the pink wire. The engine retards timing to protect itself from detonation at higher loads. The ignition mapping in these bikes is actually pretty cool. Sure you might get more power but the bike’s piston and rods wont last as long

Love the air box and carb up grade ! Can the same mods be made to 05 X

Cortar o fio rosa do módulo de ignição, realmente dei a crf 450 x mais calma, menos agressivo???

Honda marking were to cut? they did that on 250s in the UK in the 60s and 70s, the carb slide was limited, open the carb and on the rod was a line.......you guess it..........marking where to cut to derestrict

I have done most of the mods on my 450x. I don't know about the pink wire. I need to check on that one. I have been having carb problems and wanted to know what product you use to clean it. I made all the mods when it was brand new and it ran so well. Very strong. It is just the bad gas that killed me by sitting for a couple years. It was a sludge pile in the tank. I had to buy a new tank. I have pulled that carb off so many times and even bought a $500 sonic cleaner with no luck. Bought new jets, etc. I have a parts washer, but I use this water based cleaner due to being in California. I think I just should move back to a petroleum based solution to fix it up.

Awesome video! Love the info. I have the same carburetor but the accelerator pump nozzle (that squirts gas when the throttle slide opens up) is all clogged up. I tried spraying carb cleaner and compressed air through the nozzle but it's still clogged. Do you have any tips or tricks to help? I would just get a replacement nozzle but I can't find any replacements anywhere online.

I’m interested in the safety wire mod in the accelerator pump

Do you know how much Brad charges for those services? I have an 05 crf450x that I’m considering doing these mods to.

I’ve done all those same mods and a few others ( new style AP with short rivet and chk valve). The only mod I regret is cutting the airbox.

curious why he deleted the hot start. I have an 05 250x, my only beef is hot starting, often takes dozens of kicks and i will kill a battery on a long ride if i stop (stall haha) often. will rejetting and opening up make it hot start so easy that its worth getting rid of? Or am i missing something?

on my crf450x 2006 I only mounted the exhaust of the crf450r 2008 without opening the filter box since I don't need extra power here in Italy, the carburetor jets keep the originals 142 main jet, 45 slow jet, 70 starter jet, or should I increase them? thank you

Is vertex still around? I used to use there pistons on my race bikes

hello! I'm from Russia, I really like your channel, tell me more about the jets in the carburetor. what is your main jet number ?

I got a 05 450x, how do I get this guy to work on my carb?

hello I have a 2005 Crf450x with a 500cc big jug head, and yosh exhaust. I did all your recommended mods and now im at the carb im 1240 ft above sea level. Should I run a 160 or 162 main jet , a 45 or 48 pilot jet and you said use two 0.5mm shims which would make it 1mm total. Is that correct. I purchased a all balls carb rebuild kit and a nicecnc air fuel screw. Appreciate your help.

You butchered that air box amigo.

Does an 04 crf 250x have a pink wire that can be removed?

The 2008 is the one you want............

yeah some people have a hot knife...or two.

If it need's a full rebuild at 40 hours that's not a very long time .

I still have the pink wire. I’m keeping it. I’m not going to need a few more rpm at redline on a mostly stock bike.

Is their said pink wire on the 19 450x

Cutting the pink wire does that eliminate the rev limiter?

I just bought a 2005 450x yesterday. I'd like to have your carb guy check it out. i live in SanGabrial Valley area. Thanks

What does a pink wire go to

JD jet kits or All Balls?

Can you give me Brads info i have tried to work on my carb with on luck 11:56

Has anyone had to split the ecu?

cut it? why not unplug it?

I went through my 450r carb last Friday. Still won’t run off choke. Everything points to the pilot jet but it’s clear. I can only assume the passage above it is blocked. When I looked up there I don’t even see a passage. Got any ideas on where or how to fix this?

You’re going to reduce air velocity into the big MX carb because you cut such a large hole. You’ll actually get more peak power, and less bog, if you cut around half as much out. You’re losing too much velocity.

Please enable subtitles in Spanish. Thank you

Need to get Brads Info. I would love to have his go through my carb!!

Done the PINKWIRE MOD to my 250x , it did NOTHING.....

Please get a tripod. I was getting motion sickness.

Don’t give two turds about seeing this guy talk!!! Show the part being removed and repaired!!!!!

People don't do these mods, sure they get a few extra HPs but you whack the emissions out and end up needlessly contributing to global warming, if you want a little extra punch buy a different bike that has been properly engineered and leave it alone.