CRF250R Must Do Mods?

Johndeere506 3/9/2017 6:34am
3/9/2017 6:34am
And yes suspension will happen not sure if Ill even ride it first. Maybe I should just for some slight break in and comparison to after the suspension work.

A rear spring for sure and maybe a fork revalve. Just didn't know if the fork revalve was the same and a fork tube with springs like normal. I know next to nothing about the air fork setup yet. Is the valving only on one side then?? Maybe dumb question.
walent215
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walent215 3/9/2017 7:39am
3/9/2017 7:39am
We had a 15 crf250r and it was a great bike stock. We did a few mods but nothing really was worth the money for the return , imo....we did a remap, pc ti duals , race fuel etc....We rode our friends stock 2016 and there wasn't much difference between the two. If you are going to do anything to the motor I would put a cam in. Exhaust is not needed. The suspension is actually very adjustable and works decent after you familiarize yourself with it. A rear spring is all I would invest in as far as suspension goes for now.If you decide its not working for you after riding it then get it revalved.
Johndeere506 3/9/2017 7:53am
3/9/2017 7:53am
walent215 wrote:
We had a 15 crf250r and it was a great bike stock. We did a few mods but nothing really was worth the money for the...
We had a 15 crf250r and it was a great bike stock. We did a few mods but nothing really was worth the money for the return , imo....we did a remap, pc ti duals , race fuel etc....We rode our friends stock 2016 and there wasn't much difference between the two. If you are going to do anything to the motor I would put a cam in. Exhaust is not needed. The suspension is actually very adjustable and works decent after you familiarize yourself with it. A rear spring is all I would invest in as far as suspension goes for now.If you decide its not working for you after riding it then get it revalved.
Great info thanks! I may do the exhaust also just because I don't like the duals really and want to give the RCT single a try. Im glad you mentioned the cam, Ive read its probably the best part to bring a little more aggressive or higher RPM power.

I think those two mods with a heavier rear spring and proper setup front/rear will probably be a pretty solid setup, at least to start with.
shkapars
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shkapars 3/9/2017 7:55am
3/9/2017 7:55am
I have '15 CRF250, Int mx vet. For start I vote for HotCam Stage2 cam, good drop in cam and suspension revalved, huge difference in performance over stock suspension. Now I have quite a lot modifications but this two are first to do

The Shop

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endurox
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endurox 3/9/2017 8:48am
3/9/2017 8:48am
Titanium muffler bearing and a bucket of prop wash. Upgrade the ignition to the latest technology, reverse transducer tri magnet flywheel.
HonDawg17 3/9/2017 8:51am
3/9/2017 8:51am Edited Date/Time 3/9/2017 8:56am
First mod you should do on a Honda...sell it and go buy a Yamaha.
3
mxb2
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mxb2 3/9/2017 9:00am
3/9/2017 9:00am
Must, and wants 2 different things. Bike is good enough stock for 90% in the world. That being said, I love a good bike build.
ajmag247 3/9/2017 9:17am
3/9/2017 9:17am Edited Date/Time 3/9/2017 9:19am
slide those shiny new forks out and put them in a box and store them somewhere. hit ebay and find any 2009-2012 crf450 KYB spring fork or 2010-14 crf250 Showa Spring fork and start from there. get the galfer solid oversized brake kit thats like 130 bucks since youll need the bracket for the larger front rotor. FMF single saves money and weight and performs better than duals. then go ride it.
Johndeere506 3/9/2017 12:58pm
3/9/2017 12:58pm
ajmag247 wrote:
slide those shiny new forks out and put them in a box and store them somewhere. hit ebay and find any 2009-2012 crf450 KYB spring fork...
slide those shiny new forks out and put them in a box and store them somewhere. hit ebay and find any 2009-2012 crf450 KYB spring fork or 2010-14 crf250 Showa Spring fork and start from there. get the galfer solid oversized brake kit thats like 130 bucks since youll need the bracket for the larger front rotor. FMF single saves money and weight and performs better than duals. then go ride it.
Yeah I was actually looking for tubes already lol. I would think I can get these to work good enough for practice riding on a track.
shkapars
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shkapars 3/10/2017 3:15am
3/10/2017 3:15am
I decided go Ohlins cartridges. After two revalvings and hundred Smile air preasures air fork performed better unrevalved Ohlins cartridges on chops, braking bumps etc when bike is vertical but as soon as you lean bike in corner spring fork front end feel takes it over. Easier follow lines, higher speed in corners.
Turbojez
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Turbojez 3/10/2017 6:26am
3/10/2017 6:26am
shkapars wrote:
I decided go Ohlins cartridges. After two revalvings and hundred :) air preasures air fork performed better unrevalved Ohlins cartridges on chops, braking bumps etc when...
I decided go Ohlins cartridges. After two revalvings and hundred Smile air preasures air fork performed better unrevalved Ohlins cartridges on chops, braking bumps etc when bike is vertical but as soon as you lean bike in corner spring fork front end feel takes it over. Easier follow lines, higher speed in corners.
OP, let me know if you want to go the ohlins route Wink
resetjet
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resetjet 3/10/2017 6:30am
3/10/2017 6:30am
tek14 wrote:
Takes 3k to make that old Honda to get Husky/KTM level. If you are not racing Limited 250 just go and get 350f. That will last...
Takes 3k to make that old Honda to get Husky/KTM level. If you are not racing Limited 250 just go and get 350f. That will last way longer and have more power.
This
Johndeere506 3/15/2017 2:25pm
3/15/2017 2:25pm
I guess the cam is different for the 2016 from the 10-15s. Anyone know who makes a cam for the 16-17s?

I just ordered the FMF Ti single exhaust to a cam with.
flomiester
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flomiester 3/18/2017 3:55pm
3/18/2017 3:55pm
you need to be very careful lwith a cam choice on the new Honda the cam that comes in it is more aggressive than the hot cam the only one that is more aggressive is one that I have web cam shafts make and it requires the spring kit I supply them .and the piston would need replacing with a j&E or a cp as the oem piston is good but the pockets were raised to increase compression and are not deep enough for the bigger cam . if you have questions your only an hour from me I have built some very good Hondas in the past you may just want to ride the bike as its not as slow as its made out to be

Jrewing
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Jrewing 3/18/2017 4:25pm
3/18/2017 4:25pm
Listen to him ^^.

The forks need the Skf full seal kit to get rid of the stiction( they have lots ). Good forks.
Single pipe is way lighter and works. Mapping will perk the engine up.
Personally I'd buy the throttle body with vortex Cdi, clean the head up and single system. Not need for fancy fuel.
Tumic
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Tumic 3/18/2017 4:46pm
3/18/2017 4:46pm
On My -14 crf250 with hot cam stage 2 and vortex ECU it made a 2hp gain on the dyno when i went from stock exhaust to akrapovic.

It also gained 1hp when i removed the seat so first thing i did when i got home fr.o.m. The dyno was drillning a couple of holes in the airbox covers as the bike clearly wants more air.
nascarnate326 3/18/2017 4:57pm
3/18/2017 4:57pm
Tumic wrote:
On My -14 crf250 with hot cam stage 2 and vortex ECU it made a 2hp gain on the dyno when i went from stock exhaust...
On My -14 crf250 with hot cam stage 2 and vortex ECU it made a 2hp gain on the dyno when i went from stock exhaust to akrapovic.

It also gained 1hp when i removed the seat so first thing i did when i got home fr.o.m. The dyno was drillning a couple of holes in the airbox covers as the bike clearly wants more air.
More air than the two large vents that are already there?
ben5020
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ben5020 3/19/2017 6:27am
3/19/2017 6:27am
I did the big bore kit, vortex ecu, stage two cam, suspension moto tasinari air boot, vp u 4.4 and she rips! Perfect vet bike for me. I had a 15,17 yz250f they had power but I hated the handling of the 17 so I built the Honda and I'm very pleased. Factory connection did a hell of a job

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Johndeere506 3/19/2017 8:34am
3/19/2017 8:34am
ben5020 wrote:
I did the big bore kit, vortex ecu, stage two cam, suspension moto tasinari air boot, vp u 4.4 and she rips! Perfect vet bike for...
I did the big bore kit, vortex ecu, stage two cam, suspension moto tasinari air boot, vp u 4.4 and she rips! Perfect vet bike for me. I had a 15,17 yz250f they had power but I hated the handling of the 17 so I built the Honda and I'm very pleased. Factory connection did a hell of a job
Yeah F CONNECTION has a drop in fork kit coming also. Would be nice to try the air forks first maybe...
Rockinar
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Rockinar 3/19/2017 9:42am
3/19/2017 9:42am
That guy using "shitty air forks" won again.
Johndeere506 3/19/2017 10:31am
3/19/2017 10:31am
Rockinar wrote:
That guy using "shitty air forks" won again.
Right on.
I want to try them for myself too. Ordered the pump and zero loss connectors so we will see.
Hopefully I like them since I don't really want to spend 800 more on parts.

MBR
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MBR 3/19/2017 11:44am
3/19/2017 11:44am Edited Date/Time 3/19/2017 1:32pm
Cheap and effective modification that we got from HRC is to shave 1,5mm from cylinder top. We made that to our team bikes and that combined with TwinAir Prower Flow filter cage (or remove screen), pipe and a richer map makes a really big difference.
Joe512
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Joe512 3/19/2017 4:51pm
3/19/2017 4:51pm
Sr_Vet_Rider wrote:
I have a brand new Yoshimura Carbon/ Titanium system for that bike, if you're interested. The box hasn't even been opened yet. I'll sell it for...
I have a brand new Yoshimura Carbon/ Titanium system for that bike, if you're interested. The box hasn't even been opened yet. I'll sell it for 1/2 of retail pricing. I'm pretty sure it will work way better than the single FMF, but I have nothing to back it up, besides freinds who bought the Yosh systems when they wanted the best pipes.

Let me know, if you're interested, Shaun

http://www.yoshimura-rd.com/product/honda-crf250r-exhaust-system-228421…
What kind of price are we talking?
Joe512
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Joe512 3/19/2017 5:01pm
3/19/2017 5:01pm
Air forks are what you make them, spend 5 minutes less trolling vital and do your homework on how to properly set them up. With the exception of high caliper riders that feel things most people don't the biggest issue with air forks is people who can't comprehend how they work. So instead of admitting that they are to dumb to use them people get defensive and trash talk all air forks.
Johndeere506 3/19/2017 5:10pm
3/19/2017 5:10pm
Joe512 wrote:
Air forks are what you make them, spend 5 minutes less trolling vital and do your homework on how to properly set them up. With the...
Air forks are what you make them, spend 5 minutes less trolling vital and do your homework on how to properly set them up. With the exception of high caliper riders that feel things most people don't the biggest issue with air forks is people who can't comprehend how they work. So instead of admitting that they are to dumb to use them people get defensive and trash talk all air forks.
I have read a little and am not worried about setup. The people that say they chage through the day is what I'm more worried about. Keep in mind I have zero idea if that true or not.
flyin200machine 10/31/2018 7:31am
10/31/2018 7:31am
I just bought a 2016 a month ago and have learned a lot about the suspension tuning. I'm a fast 40+ B offroad racer mainly now but was even better at motocross.
Jumping and cornering this bike is equal to the best it gets. Offroad the forks will never be like dual chamber spring. But if you read the manual you actually max out the pressure of one bladder to make it softer through top half of stroke , you don't lower it. Very detailed manual and if you mess up pressures you will think they are the worse forks ever built.

Until I get my 19 450Rx I have to make these forks work for the next few offroad races. Then it's back to Motocross only and play riding/jumping:-)

chasestevenson599 10/31/2018 9:03am
10/31/2018 9:03am
I raced the 2014-2017 crf250 for SX and Outdoors. Only things I ever did was Vortex ECU (huge improvement), high compression piston, Exhaust (I ran the single side but actually preferred the low to mid response the duals gave since that's where it was most lacking for me), and Cam (I have a race spec web cam I would like to get rid of for this bike, it's a great cam with a special grind from web.)

Also spring forks are a nice plus, but factory connection can dial the air forks in really well.

Email me at chasestevenson199@gmail.com if you're interested in the cam
usafwx
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usafwx 10/31/2018 10:15am
10/31/2018 10:15am
Flatliner wrote:
2018 crf250 is all new, like the 450 this year. Just something to think about.
All new with problems (cams locking up, overheating and clutch baskets detonating).
2
BikeGuy321
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BikeGuy321 10/31/2018 12:09pm
10/31/2018 12:09pm Edited Date/Time 10/31/2018 12:38pm
Just get a 350 or a 450 and tune the crap out of the chassis. If you want a fast 250F, get a KTM, Yami, or Husky. It's gonna cost $2-3k to get a Honda to where those other bikes are stock. That's money you could be spending on those other bikes to have a really dialed chassis with a relatively dependable stock motor.

There's no way you're gonna 'save money' in the long run on a 250F, unless it never gets used. 250Fs are the most high-maintenance bikes there are.

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