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Honda CRF250F
December 27, 2018 version

Click pictures to  supersize.


Honda announced the new 2019 CRF250F in early November, 2018. Details on the  Honda CRF250F web page.

Features and Benefits


Let's have a look at this new beauty...
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The Brazilian home model has a headlight, and a small instrument panel hidden behind it. busy

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ThumperTalk inmate 'tatau' from Brazil posted a very informative video on ThumperTalk where he showed the 250F completely disassembled. He showed the cylinder head and cam and discussed various features.  CRF250F how its made
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Some of his comments:

"Rear shock is locked like in the 230. I had to drill it to remove nitro and then disassemble it. But the internal valve and shims stack is much better than 230."

"Head gasket is multiple layered steel."

"Dog bone not aluminum, only the swingarm is."

"250F steel chassis is 5.3 lbs heavier than 230 chassis.
250F engine is 6.6 lbs heavier than 230 engine.
I was surprised to find out 250F steel gas tank (without gas pump) is 1.1 lighter than 230 plastic tank."


Other ThumperTalk threads:

2019 Crf250f new model!!     facts on the new CRF250f

 

ADVrider thread:

New, FI, Air Cooled Honda CRF250F

 

Race in Brazil - CRF250F wins the 5th Challenge Take Off driver Rodrigo Cavalini


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The Service Manual is available from   Helm, inc.

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It came today 2018/12/18.
Standard high-quality Honda manual.

Selected pages are at   Honda CRF250F - Documents


I was browsing through the parts list and found a few eye openers!!!!
$40 spark plug  $400 fuel tank  Over $900 for FI gizmos

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Comparo - CRF250F vs CRF230F

CRF250F 2019 (from Honda web page and Honda Service Manual)

CRF230F (from Honda Service Manual)

Engine 249cc air-cooled single-cylinder four-stroke 223cc air-cooled single-cylinder four-stroke with electric starting
Bore and stroke 71.0 x 63.0mm 65.5 x 66.2mm
Compression ratio 9.6:1 9.0:1
Valve Train SOHC; four-valve SOHC; two-valve
Cam Intake opens at 1mm lift 0° BTDC
Intake closes at 1mm lift 35° ABDC
Exhaust opens at 1mm lift 40° BBDC
Exhaust closes at 1mm lift -5° ATDC
Intake opens at 1mm lift 10° BTDC
Intake closes at 1mm lift 40° ABDC
Exhaust opens at 1mm lift 35° BBDC
Exhaust closes at 1mm lift 10° ATDC
Engine dry weight 73.0 lbs 68.8 lbs
Air filter Oiled polyurethane foam Oiled polyurethane foam
Induction Fuel-injection, 34mm throttle bore; bank angle sensor assembly Carburetor, 28mm piston-valve, 42 pilot, 102 main
Transmission 5-speeds, primary reduction 2.863 (63/22) 6-speeds, primary reduction 3.090 (68/22)
1st thru top ratios 2.846  1.900  1.400  1.083  0.897 2.769  1.941  1.450  1.148  0.960  0.812
1st thru top internal gears 37/13  38/20  28/20  26/24  26/29 36/13  33/17  29/20  31/27  24/25  26/32
Final drive #520 O-ring sealed chain, 13/50T (3.846) #520 O-ring sealed chain, 13/50T (3.846)
Starting system Electric starter motor Electric starter motor
Battery Yuasa YTZ7S Yuasa YTX5L-BS
Ignition Full Transistorized CDI solid-state digital
Charging system Single phase output alternator Single phase output alternator
Regulator/rectifier SCR shorted single phase, half-wave rectification SCR shorted single phase, half-wave rectification
Spark plug and gap NGK LMAR7H-9DS   .8 - .9mm (.03 - .04") gap NGK DPR8EA-9   .8 - .9mm (.03 - .04") gap
Front suspension 41mm telescopic fork; 8.5" travel 37mm leading-axle Showa fork, 8.5" travel
Rear suspension Pro-Link Showa shock with spring-preload adjustability, 9.1" travel Pro-Link Showa shock with spring-preload adjustability, 9.1" travel
Front brake Single 240mm disc Single 240mm disc
Rear brake Single 220mm disc Drum
Front tire 80/100-21 80/100-21
Rear tire 100/100-18 100/100-18
Rake (Castor) 26° 5´ 26° 45´
Trail 4.0" 4.4"
Wheelbase 55.9" 54.0"
Seat height 34.8"
 
34.3" - '03-'07
34.6" - after '07
Ground clearance 11.3" 12.0"
Curb weight * 265 lbs
 
 
250.2 lbs - '03-'07
248.5 lbs - '08-'14
249 lbs - after '14
Dry weight 255 lbs (deducting 10 pounds for 1.6 gallons of gas) 233 lbs (weighed by me)
Fuel capacity 1.6 gallons, metal tank
 
2.17 gallons, including 0.4 gallon reserve - '03-'07
1.85 gallons, including 0.34 gallon reserve - after '07
Color Red Red
Emissions Meets California Air Resources Board (CARB)
and EPA off-road emissions standards.
Meets California Air Resources Board (CARB)
and EPA off-road emissions standards.
     
* Curb Weight - includes all standard equipment, required fluids and a full tank of fuel-ready to ride.


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