HMF YFZ450R Competition Series Exhaust and Fuel Optimizer Test 

What type of tuner are you using?

What tuner???

We no longer have this test unit. HIt up the guys at HMF directly they can help a bunch. They also have videos on how to tune the optimizer on RU-vid.

Did u use a fuel optimizer cuz imma get a slip on HMF comp and wondered if I needed one

@@bradenneverman8442 No i was not running an optimizer but you don’t need one with the slip on An now i changed my exhaust to dasa exhaust in my opinion I recommend you to run a dasa full exhaust system because its just better

To get rid of the maximum amount of low-end hesitation you will need a modern map for the PCV. If you run a map tuned for the pre 2014 model it will not add sufficient fuel to the lower-end. You can extensively tune the map with a laptop computer, which we did not do. We found a map that got it close, but not quite perfect. Dan Lamey from DASA and the guys at Moto X Perts both have maps for the latest version of the YFZ450R that they say run quite good off the bottom. With its on-board tuning we had better luck getting rid of our YFZR's hesitation off idle with the HMF Fuel Optimizer although we had its low-end fuel capabilities maxed out. The range of the Optimizer's external adjust-ability is limited compared to that of the PCV with a laptop computer attached to it which will let you tune to the limits of your fuel injector. We plan on sending our Optimizer to Dobeck to have additional fuel added to its internal base map. Hope this helps.

Yeah dude basically for us yfz450 guys it's not really worth it to get an exhaust unless you're ready to to cash out for a ecu , personally I'm waiting til I get a vortex and a dyno tune at a shop

What's some basic mechanical skills you should be able to handle it yourself. Or you can have the dealer do it.

The HMF tuner comes pre programmed for the exhaust. We did some tuning with the on board. Tuning feature and made it even better than the tune that HMF sent it with. We did not use a dino we just tuned it seat of the pants. If you just install the tuner as it comes, your bike will run pretty well, but you will eliminate more of the low inhesitation With a little fine tuning. If you are looking for a turnkey setup PEP tuning can reflash your stock ECU for around the same price as an after market tuner. If you are planning on going with a high compression piston and a bigger cam, you might want to stick with an after market tuner But expect to do more tuning. If you're just going to do a pipe and maybe an intake you might want to just get your ECU reflashed. PEP tuning has a facebook page where you can find their phone number if you are interested. We also did a big three test with an exhaust comma fuel customs intake comma and a PEP stock ECU reflash If you would like to learn more about it. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-xiEX3cxZcls.html The vortex e c u is the ultimate tuning upgrade that will make the YFZ450R run the best. However comma it is a little more complicated. Having it tuned is the most difficult of all because of the software that tuners have to use. Tuners are a little harder to come by. And it is typically a little more expensive than having a tune done with an after market. Fuel tuner like the HMF or Dynojet. I know we threw a lot at you, so if you have any follow up questions, please don't hesitate to ask. We would rather help you spend your money, right? The HMF tuner might be the best setup for you.

@@ATVonDemand No problem all this information was Well needed ! So would it be okay to just install my hmf performance full exhaust system and fuel optimizer on my 2014 yfz450r ? I understand the fuel optimizer is already pre-programmed but if i install my full system exhaust would there be a problem

HMF facility near me in Ohio..great Co!

you bro did you just install everything fresh out the box or did you have to take it the shop or anything for tuning ?

Bernard3rd Not really related, but something to ponder in the future. Maybe our Race Gas ATC250R VS Project TRX450R.

ATVonDemand Yea, I'm just very curious about how the power of the ATC 250R would compare to a modern 450 4 stroke... Can it keep up in a straight line? What would you think?

Bernard3rd de las que el presidente se duerma con un día de

The The Competition series has a triangular core that HMF says enhances low-end and midrange power . It also comes with three different inserts allowing you to quiet down the exhaust or open it up for maximum power. You can also add a quiet insert to a performance series exhaust and the Performance Series also allows for a ton of different color options to match your ATV. We used a Performance Series Exhaust on our TRX250X project. Here is a link to a page on their site that explains the different series HMF offers. www.hmfracing.com/series

Have a look at our Fuel Optimizer settings. These helped us quite a bit. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-g9cEkxPJfd8.htmlm42s

ATVonDemand you guys have a full exhaust etc so those settings would not work for me. I only have a slip on with the fuel programmer

You are dealing with the same symptom we dealt with when tuning the full system. Our settings won't blow up your mrahine. If anything they might be a little rich.

Powermovemj a lot if you do racing

also I have the same quad and set up as in this video

+logan smith Surprising, We assume you have the airbox lid off? Try adding or removing fuel at those throttle positions and see what happens. We had good luck with our settings. It ran well.

justin cahoon HMF makes them.

+Frank Martino If your running the largest insert in the exhaust and your optimizer is well dialed, a Fuel Custom's intake is said to deliver another three horsepower www.fuelcustoms.com/. There's not another external bolt-on we're aware of that will make a significant difference. They have a money back guarantee as well. From there, you'r going to have to dig into the engine. Compression is pretty low on the Raptor, especially the pre-2015 models. Even the 2015's could still use premium pump gas, even with a big bump in compression. A higher compression piston wont change the power delivery, it will just boost power and torque across the current spread of power. It will help torque. A different cam can boost power across the board, or in a particular part of the RPM range.. A good motor builder can suggest the right piston and cam to suit your type of riding and fuel needs. From there, head porting and valve work will farther improve the power you've started building. Of-course, we haven''t even touched on big bore and stroker kits. Good luck and please tell us how it turns our. We will be doing a few very cool Raptor projects over the summer, so you might want to subscribe. Thanks for watching.

Thanks again I will subscribe

We have heard the same thing from other people. Might be the best solution for this machine.

That’s the alba racing ecu?

badwizard12 well it will probably work fine with a Dasa pipe, Dan from Dasa rewrites fuel Maps everytime Yamaha makes a slight change to the YFZ 450R engine. if you have a Dasa pipe already, your best bet may be to get a programmer from Dasa with their map already installed

+Luis Antonio Salas We just wrapped up testing a 2016 YFZ450R and Raptor 700R. Both machines run nearly perfectly but both are lean right off idle. We notice a slight hesitation right off idle if we crack the throttle when were sitting still. Also, putting around under 5 miles an hour at idle, we had the engine flare out a couple of times when we stabbed the gas. We didn't have any problems with these machines riding normally. We are confident that adding a power commander, "with a well written fuel map" will make either machine run even better, but you don't "need" a fuel module to ride with your stock exhaust and airbox lid on. However, the YFZR or Raptor would benefit from a little more fuel right off idle. This is no different than when Motocross Action Magazine used to rejet carburetor equipped dirt bikes back in the day to dial them in stock. If you are going to buy a Power Commander for your stock 2014, buy one from a motor builder who tests with these machines constantly. Then you can get them to help you with your fuel map. People are running into a bigger bog issue with they add an exhaust to a newer model machine. Over the past three model years or so, manufacturers, not just Yamaha, have been forced to run their ATVs super lean off idle to meet more stringent emission standards. One issue people are running into, that we experienced with both our HMF Fuel Optimizer, and a Power Commander V from Yamaha's GYTR catalog, is that their maps were written for the pre-2014 model which was not at lean off the bottom. When you add a pipe and remove the airbox lid on a post 2014 model, old fuel maps just aren't rich enough at lower RPMs, and the real bogging begins. Motor building guru Dan Lamey from Dasa Racing tells us that each year of the YFZ450R requires a different fuel map to counteract Yamaha's tuning to meet emissions to run properly with a pipe and no airbox lid. The bottom line, If you want a YFZ450R, or a Raptor 700R feel free to purchase either one. If you are going to modify it ,or simply want to optimize its performance, a fuel module with a well written map will help. The wrong map, like the wrong jets in a carburetor wont run well. We will be releasing test videos of the 2016 YFZ450R and Raptor 700R in the coming couple of weeks. Later this Summer we will be doing a head to head track and trail comparison between the two machines. Subscribe to check them out. If you have any other questions, please don't hesitate to hit us back. You can message us on Facebook if you want to correspond directly. Now go buy a new quad, we wish we could.

+ATVonDemand thanks so much for the info, im going for the '16 raptor. you guys have a very useful and good content, greetings from Lima-Peru

+Luis Antonio Salas You will love the Raptor. It several of our riders favorite sport ATV in recent history. Tell us how you like it. We have heard from a friend that Peru is a very beautiful place.. Thanks for watching and for reaching out.

+Jake Sand HMF lists a Competition Series exhaust for the Warrior/Raptor 350 on their website www.hmfracing.com/. They also offer a Performance series with some very cool color options, jet kits, and filters. A pipe, jet kit, and drilling some holes in your air box lid would yield a nice gain in performance for your Warrior. A helpful hint from a former Warrior/Raptor 350 owner, install a Pro Design Pro Flow intake kit with a dual stage foam filter. the stock airbox/filter setup doesn't seal reliably.

We're not sure if there's a way to do a one-step reset but you can simply change the settings back to where they were in the beginning. If you're not sure what they were, call HMF and ask to talk their tech department.

Ok thanks I will try that

Moto_ bro_24 which one?

ATVonDemand I’m not exactly sure it’s a 04 and the exhaust is blue it’s a full exhaust

Moto_ bro_24 if he exhausts was from 2004 then it's probably the performance series. We haven't tried it back to back with a competition series but I'm guessing it may be a bit louder although I could be wrong. If you haven't repacked it in a while putting some fresh packing in might help quiet it down a bit and make it sound better.

ATVonDemand yeah I like it loud though

Nothing

Raptor 4 Life hmf stand for holy mother fucking loud.

Curtis Sparks is better than both power wise and decible wise

Fox250R We were able to ride without consideration for throttle position entering corners. The machine no longer fell on its face right off idle and never flamed out unexpectedly. Maybe you are super sensitive pro rider who could detect something we didn't, but compared to stock and our other testing the problem was cured as far as we were concerned. It seems that the YFZR is very lean off the bottom, which no doubt helps with emissions but leaves it starving for fuel.

get a Vortex programmer and the bog goes completely away

+Socialhazard Ya I figured that out! To bad these people didn't.

i honestly think HMF paid these guys to give a good review...

+Socialhazard I was thinking the same thing, just didn't wanna say it lol!

+John Pearson Our fuel settings are listed at 3:32. The settings not listed weren't changed.

+ATVonDemand Ok, thank you for the reply. I have the setting you have in this video as mine now, still experiencing some hesitation in the 1/4 throttle range, it's much better than what I had it set as before which was base settings which was 4 for everything

+John Pearson you may want to go to 7.5 or 8 on the green setting and see if that improves it further.

+John Pearson Youll never get the hesitation to fully go away. Buy a Vortex!

+Fox250R That's what one top motor builder is saying, However, Dasa, Moto X Perts, Fuel Customs Intakes, and several other respected motor builders we've spoken with all say that you can get rid of the hesitation with a properly tuned fuel map. According to Dan Lamey at Dasa,, "Each year of the YFZ450R requires a different fuel map to work properly." So unless you have the exact same year and exhaust a map was written for, it may not work properly. Dasa could sell us a Vortex just as easily as a less expensive Power Commander. They tell us the Vortex is not mandatory for achieving a smooth hesitation free power curve.

+Nathan Mcfall Its test rider Dave Trimble's private practice track. It is located in north west Kentucky.

Yes they need to be saved!