Regarding the decibels, I have experimented with ways to lessen the volume. I use the Yoshi full system on my CRF250L, K&N filter, opened out air box (Custom snorkel), EJK, and disconnected O2 Sensor. Especially with the spark arrestor installed instead of the volume insert, the noise was painful, so I created a simple baffle system at the tailpipe. The result is still loud but much improved, plus the increased back pressure boosted the power in the lower RPM range (or so it seems to my butt dyno). Had to lean out the EJK settings to compensate of course. It feels great now with power where it's most useful, and not as excruciatingly loud. Just some thoughts :-)
Just drove a 2020 and it had a cheapy amazon full exh but it did have a large header pipe with expansion chamber so it musta been better than stock, the backfire screen was removed and it had an ejk fuel tuner on it. I cant imagine how slow they musta been stock cauee with all that done it still seemed pathetically slow. Our crf230 will out drag it. Buddy got a 50t rear sprocket for it, curious if the tall gearing is the only thing making it feel so lazy as 24 rwhp isnt that bad, lil more than what a 400ex puts out to the tire and they accelerate quite a bit harder. Hopefully it will still do 115km/hr. That would give it enough spare rpm cruising at 100.
Does the 13T counter sprocket affect the HP/Torque measurement of the dyno? Did you run a dyno test of the 305 Big Bore Kit? What about a video on the combination (and separately) 305 BBK + FMF Q4 & Megabomb / PowerCore?
Do you know if the 2020 CRF250L ABS is dual/twin spark? Do you have any input on: " For the 2020 CRF250L : Does the 305cc Big Bore kit work better with a FMF Q4 & Megabomb or not? Is you bike post 2017? Do you know if the 2020 is dual spark? Do you know of anyone that has Dyno'ed the stock CRF250L (post 2017) and with the 305cc Big Bore and FMF Q4 & Megabomb and 14T/40T stock gearing? Does the 13T and/or 42T sprockets / rear tire size affect the dyno readings? Does the EJK for the 305cc BBK improve only by them selves or when exhaust mods are made?" Do you know how the 12o'clock SpeedoDRD DRD-H5 SPEEDOMETER / SPEEDO CALIBRATOR HONDA mod works? Is it plug and play?
So it seems that its all about the header on this bike.. I wish I could only buy the header and fit on a gutted pipe but you have to get the whole package..
Hello, just a simple question. I guess this bike has been sold in the USA. I'm from France and very interested in this bike but according to Honda website it is supposed to be 23 hp STOCK (2012 - 2016) ! How come the crf250l is only 18 hp when sold in the USA ? Is there another way of calculating the hp the engine delivers ? Are these mods worth paying fot if the stock bike is already 23 hp ? Thx for your help ! The 2017 version in europa is said be 25 hp stock ...
@@Alverok1011 not considering that the rider is also on the bike, which lowers even a bit more the HP. Probably the bike, w/o the rider ends up with about 20 wheel HP, stock.
They all benefit from an exhaust upgrade. However, they benefit most from the 300 stroker crankshaft conversion. Makes a world of difference. We've done over a dozen of them already.
@Bunnyshooter 223 I realize its been 3 months and you probably already got the tuner haha, but I suggest a tuner even with a slip on. It feels like the bike has worse low end power than usual :/ Just coming from some kid that just got a dirt bike lol, so what do i know
K&N are garbage in the dirt. They flow well but gaps are to big. They allow dirt thru and will damage engine. Common knowledge in the dualsport crowd. Careful using them.
Great video :-) Would yo be able to post the dyne results on the Thumper talk site? I,ve lost the thread on the forum to reply directly. It looks like that you have lost a bit of low down to make the gains in the mid to top end.
+damo010 Thanks! We had all that on Thumper Talk and they took my video down. Not sure why they did..... The bottom end stayed almost exactly the same and at about 5500 RPM the HP and Torque increase steadily until red line including much better over rev... Now about 23 HP. The only bad thing is the noise which I'm not a big fan of but I don't see a lot of other options with that cantankerous muffler......
+Rix Babs No popping. Lots of noises inside a building with a bike on the dyno. No, It runs great. I'm uploading a video of me riding it today on some good dirt trails/roads
Pro Cycles LLC I thought maybe it was a harmonic resonance thing with the camera's audio but wasn't sure. BTW, another nice video on 11/28. Will watch it again and post a comment.
So, the larger header pipe caused a loss in low end torque? Also, these bikes are around 23hp from the factory. There's not a 28% loss in the drive train. 15% is typical for cars and even less for motorcycles. Full disclosure is needed here. I know you are selling headers and silencers and EJK tuners, but something is a foul here...
Where did anyone say the larger head pipe caused a loss in low end torque? NO, they are not 23 HP from the factory. I've dyoned dozens of these bikes and the 2013-2016 models are just barely 18HP at the rear wheel. That's it, no more. The 2017 and up models are around 22.5 HP at the rear wheel. Who said there is a 28% loss in the drive train? Not me. Where did you get your data from that 15% is typical for cars? Can you provide some facts to back this up? Links to scientific journals that are peer reviewed that can illustrate this? We are not selling headers and silencers. Did you listen to this at all????? I frankly stated that this can be done at home. The only thing foul here is your convoluted thinking.
Chain, transmission, rider all effect things. These bikes are 18 HP on a Dyno, stock, period. 23 HP is at the crank! You absolutely get ~5 HP out of the mods and ejk or ECU flash. I don't believe something is "foul" at all.
@@jimr.173yep you nailed it lol. To be fair tho, modern FWD cars average out around 15% drivetrain loss. People never realize when hp is rated that it could be crank or wheel hp and then fly off about numbers not having a clue what's happening lol
Years from now how many such stock bikes will be on the road vs. modified? Honda engineering is "all in." That is, engine is designed and tested as a whole product. Slathering on questionable aftermarket parts violates that Honda philosophy. You might get more power but at the expense of longevity. In my experience modified bikes end up as troubleshooting nightmares who end their lives rusting away in a shed somewhere, while the stock versions are sought after and become classics.
I would like to see a dyno result series of a crf250F before and after mods that would be interesting
Regarding the decibels, I have experimented with ways to lessen the volume. I use the Yoshi full system on my CRF250L, K&N filter, opened out air box (Custom snorkel), EJK, and disconnected O2 Sensor. Especially with the spark arrestor installed instead of the volume insert, the noise was painful, so I created a simple baffle system at the tailpipe. The result is still loud but much improved, plus the increased back pressure boosted the power in the lower RPM range (or so it seems to my butt dyno). Had to lean out the EJK settings to compensate of course. It feels great now with power where it's most useful, and not as excruciatingly loud. Just some thoughts :-)
I, as everyone else here are curious what you ended up with on settings with the EJK...?
Wow looks like you definitely picked up some extra juice for sure!
Just drove a 2020 and it had a cheapy amazon full exh but it did have a large header pipe with expansion chamber so it musta been better than stock, the backfire screen was removed and it had an ejk fuel tuner on it. I cant imagine how slow they musta been stock cauee with all that done it still seemed pathetically slow. Our crf230 will out drag it. Buddy got a 50t rear sprocket for it, curious if the tall gearing is the only thing making it feel so lazy as 24 rwhp isnt that bad, lil more than what a 400ex puts out to the tire and they accelerate quite a bit harder. Hopefully it will still do 115km/hr. That would give it enough spare rpm cruising at 100.
can you tell how much it afected the mpg?
Hi thx for sharing. Would you mind sharing the ejk settings you've come up with? that would be helpful.
stock for this bike is 24.4hp in the uk for 2017 upwards. if you add all these mods it would be around 28/29hp
At the rear wheel?
no . at the front wheel
Crankshaft
24.4 at the crankshaft.
The U.S. model has 23 Horsepower stock, buuuutttt that's at the crank. 18 horsepower at the wheel.
nice info, explanation and test results.!
Does the 13T counter sprocket affect the HP/Torque measurement of the dyno? Did you run a dyno test of the 305 Big Bore Kit? What about a video on the combination (and separately) 305 BBK + FMF Q4 & Megabomb / PowerCore?
Do you know if the 2020 CRF250L ABS is dual/twin spark? Do you have
any input on: " For the 2020 CRF250L : Does the 305cc Big Bore kit
work better with a FMF Q4 & Megabomb or not? Is you bike post 2017?
Do you know if the 2020 is dual spark? Do you know of anyone that
has Dyno'ed the stock CRF250L (post 2017) and with the 305cc Big
Bore and FMF Q4 & Megabomb and 14T/40T stock gearing? Does the 13T
and/or 42T sprockets / rear tire size affect the dyno readings?
Does the EJK for the 305cc BBK improve only by them selves or when
exhaust mods are made?"
Do you know how the 12o'clock SpeedoDRD DRD-H5 SPEEDOMETER / SPEEDO
CALIBRATOR HONDA mod works? Is it plug and play?
So it seems that its all about the header on this bike.. I wish I could only buy the header and fit on a gutted pipe but you have to get the whole package..
Right, you need all the components. If u get no more air in or out, even a 4" header won't do any good.
Is there a better swingarm available for the 250l ?
so the header/exhaust system made the most improvement right ? ....
Hello, just a simple question. I guess this bike has been sold in the USA. I'm from France and very interested in this bike but according to Honda website it is supposed to be 23 hp STOCK (2012 - 2016) ! How come the crf250l is only 18 hp when sold in the USA ? Is there another way of calculating the hp the engine delivers ? Are these mods worth paying fot if the stock bike is already 23 hp ? Thx for your help !
The 2017 version in europa is said be 25 hp stock ...
Most manufacturers measure crank horsepower, not wheel. you can lose quite a bit of HP through the drive train of any vehicle.
@@Alverok1011 not considering that the rider is also on the bike, which lowers even a bit more the HP. Probably the bike, w/o the rider ends up with about 20 wheel HP, stock.
You said you were foing to make a fmf pipe that sidnt require a ejk kit. Did i hear that correctly and where can i get 1
What's that disturbing audio sound??
Wanted to watch the video but That peep, makes me wanna puke
I need this done to my bike I got fmf but no ejk
hey nice vid ! just go full stage one this week ! what is the setting of your FMF tuner ? i figure out that is the same tuner like EJK !
Does the post 2017 benefit from a Q4 exhaust & Megabomb header (or just the pre-2017 does)?
They all benefit from an exhaust upgrade. However, they benefit most from the 300 stroker crankshaft conversion. Makes a world of difference. We've done over a dozen of them already.
@@jimr.173 what is a 300 stroker conversion?
I have a 2017 CRF 250 L. I want to replace my exhaust do I need the tuner?
@Bunnyshooter 223 I realize its been 3 months and you probably already got the tuner haha, but I suggest a tuner even with a slip on. It feels like the bike has worse low end power than usual :/ Just coming from some kid that just got a dirt bike lol, so what do i know
K&N are garbage in the dirt. They flow well but gaps are to big. They allow dirt thru and will damage engine. Common knowledge in the dualsport crowd. Careful using them.
U just run the pre filter cover, then they work great.
I just checked the specs on these. They're 18kw not HP. I think you should be making about 28hp with that set-up
Is there any way you can tell us the tuner settings? It's a 6 mode tuner correct?
Can't read your dyno screen-camera'at an angle to it. Good info on where the HP lies though1
It's down on low end power now though, you need that for hill climbs
Great video :-) Would yo be able to post the dyne results on the Thumper talk site? I,ve lost the thread on the forum to reply directly. It looks like that you have lost a bit of low down to make the gains in the mid to top end.
+damo010 Thanks! We had all that on Thumper Talk and they took my video down. Not sure why they did..... The bottom end stayed almost exactly the same and at about 5500 RPM the HP and Torque increase steadily until red line including much better over rev... Now about 23 HP. The only bad thing is the noise which I'm not a big fan of but I don't see a lot of other options with that cantankerous muffler......
Very nicely done. Thank you for taking the time to explain the set up and mods. BTW, was the engine popping when transitioning from mid to top end?
+Rix Babs No popping. Lots of noises inside a building with a bike on the dyno. No, It runs great. I'm uploading a video of me riding it today on some good dirt trails/roads
Pro Cycles LLC I thought maybe it was a harmonic resonance thing with the camera's audio but wasn't sure. BTW, another nice video on 11/28. Will watch it again and post a comment.
+Rix Babs Oh yes, there is some resonance with the camera at a particular RPM. This camera does it with every dyno test we do......kinda strange..
Great video, just what I've been looking for. Where can I find the EJK setting? Keep the videos coming.
The beeping noise is such a shame on a such informational video
Good work
So, the larger header pipe caused a loss in low end torque? Also, these bikes are around 23hp from the factory. There's not a 28% loss in the drive train. 15% is typical for cars and even less for motorcycles.
Full disclosure is needed here. I know you are selling headers and silencers and EJK tuners, but something is a foul here...
Where did anyone say the larger head pipe caused a loss in low end torque? NO, they are not 23 HP from the factory. I've dyoned dozens of these bikes and the 2013-2016 models are just barely 18HP at the rear wheel. That's it, no more. The 2017 and up models are around 22.5 HP at the rear wheel. Who said there is a 28% loss in the drive train? Not me. Where did you get your data from that 15% is typical for cars? Can you provide some facts to back this up? Links to scientific journals that are peer reviewed that can illustrate this? We are not selling headers and silencers. Did you listen to this at all????? I frankly stated that this can be done at home. The only thing foul here is your convoluted thinking.
Chain, transmission, rider all effect things.
These bikes are 18 HP on a Dyno, stock, period. 23 HP is at the crank!
You absolutely get ~5 HP out of the mods and ejk or ECU flash.
I don't believe something is "foul" at all.
@@jimr.173yep you nailed it lol. To be fair tho, modern FWD cars average out around 15% drivetrain loss. People never realize when hp is rated that it could be crank or wheel hp and then fly off about numbers not having a clue what's happening lol
Years from now how many such stock bikes will be on the road vs. modified? Honda engineering is "all in." That is, engine is designed and tested as a whole product. Slathering on questionable aftermarket parts violates that Honda philosophy. You might get more power but at the expense of longevity. In my experience modified bikes end up as troubleshooting nightmares who end their lives rusting away in a shed somewhere, while the stock versions are sought after and become classics.
my ears are bleeding
rip my ears
Although I’m sure you can feel the difference to me a 5 hp gain is not really worth 1000 bucks and the noise