Yamaha YFZ450R Big 3 Engine Upgrades, Dasa Exhaust, Fuel Customs Intake and PEP Reflashed ECU Test

[Music] foreign [Music] TVs enjoy significant horsepower gains by addressing the big three engine upgrades The Big Three refers to utilizing a free or flowing exhaust air intake system and the necessary jetting or fuel mapping changes to match the increased airflow more stringent EPA standards have made things a bit more complicated with the introduction of an air induction system on yamaha's sporty TV models it injects air from the intake into the exhaust to help burn off any remaining fuel that makes it past the combustion chamber causing some minor backfiring under deceleration this and the accompanied leaner running conditions at lower RPMs left 2014 and newer YFZ 450rs with an occasional minor hesitation or fog at lower RPMs when you crack the throttle this becomes far more pronounced with the use of a free or flowing exhaust or intake without proper tuning in the mechanical setup to match for this YFC 450R big three test we're pairing up a dash erasing exhaust cost fuel Customs intake into pep tuning ECU reflash in search of getting the most performance possible out of the stock engine while keeping things simple and relatively affordable fuel Customs has been a leader in modern sport ATV intake design for some time testing many aftermarket exhaust systems with air intakes Dasa racing produces one of fuel Customs favorites due to their Performance Construction and ease of Maintenance pep tuning tells us that the Dasa racing exhausts and fuel Customs intake are the ultimate combination for the stock YMC 450R so we knew our intake exhaust and tuning Solutions should work beautifully together [Music] the first step in getting your 2014 and newer yfz450r running its best is blocking off the air induction system our test unit had an air induction system block off kit from 38 Motorsports installed it helps eliminate the backfiring under deceleration eliminates the Clutter of the air induction system and is necessary for proper tuning with an air fuel sensor Desa racing exhausts are handmade in the USA beautiful TIG welding is used throughout fitting of a high-end performance exhaust the head and mid-pipe feature 304 stainless steel construction with an aluminum silencer body and end cap the end cap and mid-pipe attached to the silencer body using Allen's screws instead of rivets for easier repacking or replacing of individual Parts Billet silencer mounts add both looks and strength to the exhaust the silencer and Dasa logo are available in a variety of colors to match your machine a Billet in cap adds to the exhaust Aesthetics the exhaustic spanning multi-step design is said to allow a greater expansion of exhaust gases for a broader power band without sacrificing the horsepower according to fuel Customs the Das are racing exhaust adds around seven to eight P horsepower sound output it's a claimed 102 decibels at 4 500 RPMs which should be legal at most tracks according to Dasa Dasa is now offering a new AMA Edition exhaust designed to meet the amas 96 decimal limit for racing fuel Customs intakes and air boxes are constructed of a rotary mold plastic they feature a tapered design and increased volume in search of increased throttle response horsepower and torque across the RPM range fuel Customs harder material is claimed to increase the intake pulse improving every aspect of performance when paired with a good aftermarket exhaust they're said to add 9 to 10 horsepower with the intake adding an additional 2 horsepower at Peak five to six horsepower and overrev while reaching Peak torque faster fuel Customs intakes are available with or without an air box which adds some added protection against splashing water and flying debris without sacrificing horsepower which is why we always utilize their air box with their intake fuel Customs air box intake systems come with their high flow 8 layer K N Style air filter utilizing fuel Customs own proprietary material with four additional layers of material for a greater level of filtration in outerwear pre-filter is included for added protection and reduced maintenance we've asked for it and fuel Customs is now offering foam outerwares for their filters they suggest running it dry for added protection in mud and wet conditions we'd oil it up a bit for added protection against dust and fine silt but your machine will run a little richer 2014 and newer intakes offer hookups for the air induction system if you have a 2013 or older model or running an air induction system block off kit like us you can order an intake for the older models for a cleaner install [Music] pep tuning is a subsidiary of legendary pep suspension they specialize in all things tuning from complete aftermarket ecu's to piggyback fuel controllers pep started providing tuning for the yfz450r stock ECU in the Pro Stock class at the ATV Motocross Nationals due to the stock quads running extremely lean from the factory from there pep created tunes for basic mods like removing the air box lid running different filters and adding aftermarket exhausts the ECU reflash is best suited to Trail Riders and Racers wanting to stick to the big three according to pep for around 350 bucks including shipping the stock ECU is retuned for fuel and ignition timing to match your setup premium piggyback programmers like the similarly priced dynajet Power Commander 5 add features like raising the rev limit setting the throttle position sensor and autotune capability with the addition of dynojet's add-on auto-tune module piggyback fuel tuners are a little more complicated to wire up and you'll be hooking up a laptop for tuning or to send different maps to figure out which one works best with your machine setup an aftermarket ECU provides the added ability to fine-tune injection timing fan on temperatures turn off tip over sensors adjust starting parameters idle RPM plus launch mode various ignition curves and traction control capabilities plus more Sky's pretty much the limit with what can be done with an aftermarket ECU however they cost around 800 and tuning can be very expensive pep tells us that nothing provides the throttle response of an aftermarket ECU but you have to decide if your needs justify the investment as a setup for a practice or local race machine we decided to go with the least expensive and Least Complicated option it had pep reflash our stock ECU they have fuel mapping and ignition settings specifically for the Das erasing exhaust and fuel Customs intake in addition to other popular exhausts on the market we received our reflash stock ECU back within a couple weeks it plugged right in and was ready to go we borrowed our YFC 450R from Trimble Motorsports racing program they typically use Maxima Racing Products to maintain their machines prior to testing our yfz450r received a fresh oil change the trimbles Run Maxima premium engine oil for practice purposes with Maximus send blend for race days where the quad is pushed harder with less time for oil changes we ran 98 octane pump gas for testing to prevent any performance gains from running routine race views foreign testing took place on a private motocross track test rider Evan Hartzell races cross country on a pair of yfz450rs giving him a good amount of experience unlikely modified Yamahas whether the quad was cold or warm our free or flowing yfz450r fired up quickly our first positive sign from the pep reflash to ECU thank you on the track the YFZ ran pretty flawlessly throttle response was good regardless of RPM we were impressed with how much fuel we could dump with a throttle while lugging the engine at lower RPMs with none of the bog the yfz450rs are claimed to suffer from this proves to us that a great running yfz450r has more to do with who's doing the tuning than the tuning device although as we've noted piggyback fuel tuners and aftermarket ecu's can unlock even more performance the only time the engine ever bobbled was on crushing jump Landings when we tried to pin it after landing instead of landing on the gas the Dasa racing exhaust combines beautiful construction with a big bark and the horsepower increase to match we certainly felt a difference compared to the stock exhaust with notably more power available at all RPMs especially from the mid-range up Dasa is responsible for building some of the fastest ATV race engines around and we know of other motor Builders who happily recommend Dasa exhausts whether you're simply uncorking your stock engine like we are or building a monster race motor the tests are racing exhaust for the Yamaha yfz450r is a starting point that's pretty hard to beat Evans yfz450r has been raced with different aftermarket exhausts in conjunction with a Vortex ECU which should add performance and yet according to Evan it doesn't feel as powerful as the yfz450r we're testing here getting the most out of the big three engine upgrades is about balancing intake exhaust and tuning Evans YFZ lacks the Freer flowing fuel Customs intake which made a difference in performance he could easily detect overall the YFC 450R feels more Unstoppable and stall proof at lower RPMs although it still needs to be kept in the mid-range and up to make serious power mid-range power is stronger feeling racing out of turns and uphills with a welcomed increase in top end power and overrev on Long straights stock machine this YFC 450R is certainly faster and easier to ride in either a casual or a race pace [Music] rid of its restrictions free-flowing and fine-tuned yamaha's yfz450r delivers a satisfying increase in performance and fun working with well-respected aftermarket companies products that admittedly work well together we were confident in combining the fuel Customs intake Dasa racing exhaust and pep reflashed ECU and came away very impressed with the results for more videos like this make sure to subscribe to ATV on demand in below for links to the products you used in this video thanks for watching [Music]

Channel: ATVonDemand

Views: 41,660

Keywords: Yamaha YFZ450R Big 3 Engine Upgrades Dasa Exhaust Fuel Customs Intake and PEP Reflashed ECU Test, YFZ450R Big-3 Upgrades, Yamaha YFZ450R Big-3 Engine Upgrades, YFZ450R Dasa Racing Exhaust Review, YFZ450R Fuel Customs Intake Review, YFZ450R PEP ECU Review, PEP ECU Reflash, PEP Tuning, YFZ450R Upgrade, YFZ450R Upgrades, YFZ450R Project, big 3, sport quad, fuel customs intake, vortex ecu, AIM ECU, YFZ450R ECU test, YFZ450R exhaust test, YFZ450R intake test, YFZ450R horsepower

Id: xiEX3cxZcls

Length: 12min 56sec (776 seconds)

Published: Sun Oct 30 2022