How Much Do Modified Engines Help? | Testing a 2022 Yamaha/GYTR YZ250F
HTML-код
- Опубликовано: 14 окт 2021
- Have you ever wanted to get a modified 250F, but were worried about cost and reliability? Let Kris Keefer walk you through Yamaha's in house off the shelf, drop-in GYTR Performance Kit and listen as he compares this GYTR package to a completely stock 2022 YZ250F. Pricing, performance gains, reliability concerns, as well as what the criteria is for Yamaha, when bringing this type of modified engine package to market.
Film: Spencer Owens
Edit: Simon Cudby
Visit Racer X Online: bit.ly/2VKTEp0
Subscribe to Racer X Magazine: bit.ly/2E45hlW
Follow us on Instagram: bit.ly/2X2F7Xc
Follow us on Facebook: bit.ly/2HvF6Wy
Follow us on Twitter: bit.ly/2JWWaWV
Subscribe to Racer X on RUclips: bit.ly/2HvhS2E
#Yamaha #Motocross 
Спорт
I've installed several of these kits,the newer yr model kits (19&up) are a completely different cylinder head,not just a CNC Ported oem head as in years past.Parts seem to last longer then most of the aftermarket stuff so that's a plus.Only thing I would like to see is a better quality timing chain as the 250f yammie seems to stretch em out fairly fast with the added PONIES,especially with a A or Pro rider aboard.
Is it me or does the head pipe look like it’s floating in the front, unattached to the frame?
Yeah it looks that way but it's cuz it wraps around the motor
Great Information.
Nice bike, gonna have to look into the package
Dont know,what those guys here are are asking for with "no added low torque".The YZ250F is known for having plenty of torque for a 250,just needed a little more overrev.That is ecactly what gytr adresses with this kit.Well done in my opinion.
Any idea how much horsepower this kit gives you
9 minutes 41 seconds of sales pitch.
Dyno comparison curves don't lie, should have included one.
Yamaha250f has is almost dead last on the dyno in there stock settings yet everyone that rides them rates them top 1-2 in shootouts for 3 years straight. Dyno doesn’t always relate to how bike is on track. Prime example Honda 450 19-20 had great dyno numbers but it was to much power which meant it didn’t get the power to ground it had so much power it caused wheel spin and felt like it was pulling your arms off.
@Rider_9 yea I have a 2020 and my body rode it after getting of his 18 yz450 and he was like dude this thing felt like my 450 down low. Now I still wish I had some more top end but it still gets the job done!
Do you have Dyno comparison between the stock YZ 250 F and the GYTR, please?
I’ve got a 2016 yz250f with a gytr head, high comp piston, and crank.
I’ve got the 23WR 250 F with the GYTR competition ECU I had to fabricate my own gytr race baffle , for some reason I couldn’t order one from Canada. Everything else on the bike is my exhaust and airbox are stock .it opened my bike up exactly the way I wanted and I noticed that with this competition ECU at around 6000 to 7000 RPM it’s like it opens up power ban or something and the bike open up. You can hear the change in the rev. So with this GYTR competition set up work for the WRs because they are a competition bike also right
The Vortex Ecu’s are a great investment especially with custom maps from xpr or twisted development
They are sweet but like all after market parts they are luxuries. Quite the opposite of investments
What's the HP gains for the money could it be 4-5-6????? Who fits this kit it's major work with a piston head cams
Hi, i would like to hear a bit more details about the vortex ignition. It sounds like just benefits, but I got another experience. You should run 98 octane and above. If you struggle to get hands on the fuel , you need octaneboost. I did try to run it at normal pump gas 95 octane.(engine knocking)What can 3 octane do? It lasted 6 hours and cost me 5grand to fix the engine.(all new except new head) Im putting the vortex away now, and will run stock ecu. Just a heads up, for the lazy people like me.
Standard octane booster is not good to run in bikes for so many reasons I’d just get pump 93 and mix it with vp112 at 1:1 ratio or take it to a dyno and run a e85 blended fuel with standard pump gas
What's it make on the dyno
Let me put it short : I like this.
Does anyone know if you can still use the power tuner app with the new ecu?
You cannot.
I have a problem with this 2022 yz250f .
When I’m riding in fifth gear with quarter throttle the exhaust glow red any suggestion ? Its a brand new bike 11 hours on it
My 22' 250fx does the same but only noticeable at dusk/night. My bike is bone stock, haven't even changed maps. I think it's ok and runs great, no signs of detonation on the plug. Thought about fattening up the lower 25% map but really like the crisp throttle response.
So to answer your question I think the light throttle maps are probably on the ragged edge of lean but if it were a problem I'd see signs of detonation. Pull your plug and check the ceramic under the electrode for signs (google it). I think under higher rpm and load the tune runs richer for a safety factor. All of these variables can be manipulated though through the tuner. Try one of Keefer's tunes, good reviews on thumpertalk.
Go to HP race development out of Texas, spend the same and get a reliable bike that will blow this out of the water! it sounds the same as a raspy stock yz…
It's got good numbers on the Dyno... can't base HP and torque numbers off sound through a computer screen lol.
Is it3200 Canadian?
Dang
Go yamaha
Dyno?
A 450 is what, less than 2 grand more? I think I'll buy a 450 instead.
Not near the same tho. The YZ450 is unbalanced, pitches under breaking, and the motor is very on/off feeling. The 250f is an incredible bike tho that doesn’t seem to have these issues. Plus it is way more fun that a 450. On a 450 you feel lazy, where the 250f allows you to ride much more aggressive. Plus much less flywheel, and a much more free feeling. Night and day difference. The 250f is a blast.
pump gas?
It’s running a high comp piston, so no. Use race gas
Only 3200 bucks 😂
Rather buy a high compression piston, call webb cams and get profile that fits what i want, or lacking, do my own porting and valvejob and not spend 3200$
3 grand and loose bottom end power… wow
Any aftermarket exhaust system for these bikes sacrifices "some" low end over the excellent stock head pipe. The mid to high end power advantage is well worth the trade off.
@@andrewbecker3700 yeah a pipe on a stock bike. This kit cost 3 grand and gained zero bottom end. That’s ridiculous
@@NickW90 Your missing the point. I've got a '21 450f that's far from stock and everything's a compromise. Its virtually impossible to retain all the low end pull the stock machines have and make gains everywhere else in the powerband. All the money in the world can't change the fact a modern 4 stoke internal combustion engines designed by Yamaha make gobs of low end grunt bone stock. Keep your bike stock if you value off idle transition more than having better power everywhere else in the curve. I personally hated how my bike felt stock.
@@NickW90 no one needs to “gain” bottom end power on a YZ250F. They easily could have if they wanted to but it already hits like any other brands 450 off the bottom, they increased the feel from mid to top in order to increase usability and window of available power. That’s where the YZ “lacked” in comparison to others so now it’s more well rounded, no one asked for more bottom from a Yamaha.
@@codygoodwin1097 maybe you didn’t ask for more bottom but I’m sure a lot of people want more bottom on a 250, especially if you’re spending 3k you don’t expect to LOOSE it…
Only 3200$$$$$$ folks!?!?!?! buy a 2 stroke and save your money... how much to rebuild that modded motor?!?!?
This is geared towards someone who races on at least a casual level. I ride 2 strokes but they are slower and harder to ride so there’s really no comparison. $3200 for a mod motor is relatively cheap.
@@a_drewski i hope your paying lol... its 99% the rider 1% the bike. This is a horrible investment for a casual level racer. Only a highly skilled professional will make the most of that motor. I am 38 so my view is a little bit different. I have learned in my 28 years of riding it is not the bike but the rider.
I’ve got both a yz250 and 250f. Two-stroke is a blast to ride but I am faster, safer, and smoother on my 250f. A top end for the two stroke is about $150. For the four stroke, $200. If $50 makes or brakes you over 50 hours you are not in the right sport. If you change your air filter regularly and oil it properly the valves are not going to move for well over 100 hours.
Gee, only $3200. I cant even afford the $9000 bike. Motocross has become ridiculously expensive. I'm out.
$5,000.00 to build a race motor...meanwhile in two stroke world you can get a pipe and ported cylinder for 1/10 that price...fourstrokes are cancer to the sport
shit you arent getting a good race motor in a 125 for $500, i spent 4300 on a yz125 mod motor in 2010. It still was just barely better than a cheapo ported 250f
You lost me at 3200.00. Sorry I'll go for the 450 instead.
Booo
Terrible. Poor job filming. Volume is really poor. You should know better.
Dyno?