Honda CRF50F 2021
Trail
49cc
4-stroke
111lb
Curb weight
21.6in
Seat height
3.8in
Front travel
3spd
Gearbox
2021 Honda CRF50F overview
- Street—
- TrailTrail
- Woods—
- Rocks—
- Desert—
- Track—
The 2021 Honda CRF50F is Honda's smallest dirt bike, a trail bike for young children learning to ride. It has an air-cooled 49cc four-stroke single with an SOHC two-valve head and a carburetor, a kickstarter, and a three-speed gearbox with an automatic clutch, so there is no clutch lever. A steel frame carries an inverted fork with 3.8 in of travel, a single rear shock with 2.8 in, and drum brakes front and rear, on 10-inch wheels. The seat is 21.6 in high, it weighs 111 lb ready to ride, and a throttle limiter lets a parent cap its speed.
Who it's for
Young children on their first motorcycle: the seat is just 21.6 in high, the automatic clutch means there is no clutch lever to learn, and the adjustable throttle limiter lets a parent cap the speed while a new rider learns. Honda's weight limit is 88 lb (40 kg), including the rider and any accessories. It is for off-road use only, carries one rider, and has no lights.
Quick facts
- The 2021 Honda CRF50F has a 49cc carbureted 4-stroke engine, a 3-speed gearbox and kick start.
- The 2021 CRF50F weighs 111 lb ready to ride and has a 21.6 in seat height.
- The 2021 CRF50F runs 2.50-10 33J front and 2.50-10 33J rear tires.
- The 2021 CRF50F takes 0.63 US qt (0.6 L) of 10W-30 engine oil; change it every 600 mi or 6 months.
- The 2021 CRF50F listed at $1,599 (US MSRP). It is not street legal in the US.
2021 Honda CRF50F photos
2021 Honda CRF50F specifications
Engine
- Displacement
- 49cc
- Stroke
- 4-stroke
- Fuel system
- Carburetor
- Bore × stroke
- 39 × 41.4 mm
- Compression
- 10.0:1
- Cooling
- Air
- Configuration
- Single-cylinder
- Valve train
- SOHC
- Valves
- 2
- Engine oil
- 0.63 US qt (0.6 L)
- Oil type
- 10W-30
Clutch
- Type
- Centrifugal
- Assist
- Auto
Drivetrain
- Starting
- Kick
- Transmission
- 3-speed
- Chain size
- 420
- Front sprocket
- 14T
- Rear sprocket
- 37T
Dimensions
- Seat height
- 21.6″
- Ground clearance
- 6″
- Wheelbase
- 35.8″
- Width
- 22.8″
- Height
- 30.5″
- Length
- 51.2″
- Curb weight
- 111 lb
- Fuel capacity
- 0.69 gal
Price & warranty
- Destination charge
- $190
- Colors
- Red
- Warranty
- 6 months · transferable limited warranty
Equipment
- Spark arrester
- Standard
- Ignition key
- Standard
- Throttle limiter
- Standard
- Lights
- Not fitted
Frame & steering
- Frame material
- Steel
- Rake
- 25°
- Trail
- 1.3″
Suspension
- Front
- Inverted telescopic fork
- Front travel
- 3.8″
- Rear
- Single shock
- Rear travel
- 2.8″
Wheels & tires
- Front wheel
- 10″
- Rear wheel
- 10″
- Front tire
- 2.50-10 33J
- Rear tire
- 2.50-10 33J
Stock features
- Street legal (US)
- No
2021 Honda CRF50F maintenance
From the maker's manuals. Tap a row to see the manual page.
Service intervals
- Change engine oil (first time)
- After 100 mi or 1 month
- Change engine oil
- Every 600 mi or 6 months
- Clean air filter
- Every 600 mi or 6 months
- Inspect spark plug
- Every 600 mi or 6 months
Spark plug
- Spark plug
- NGK CR6HSA
- Plug gap
- 0.02 – 0.03 in (0.6 – 0.7 mm)
- Spark plug (alternative)
- DENSO U20FSR-U
- Spark plug (cold climate, below 41°F/5°C)
- NGK CR5HSA
- Spark plug (cold climate, below 41°F/5°C, alternative)
- DENSO U16FSR-U
- Spark plug (extended high speed riding)
- NGK CR7HSA
- Spark plug (extended high speed riding, alternative)
- DENSO U22FSR-U
Torque specs
- Oil drain bolt
- 18 ft‑lb (24 N·m, 2.5 kgf·m)
- Front axle nut
- 34 ft‑lb (46 N·m, 4.8 kgf·m)
- Rear axle nut
- 34 ft‑lb (46 N·m, 4.8 kgf·m)
Parts that fit the 2021 Honda CRF50F
Exact parts for this bike. Tap one to see every store selling it, cheapest first.
Maintenance
Oil, filters, spark plug, battery, brakes and drive parts you replace as you ride.
Engine oilMotul 7100 4T 10W-30from $34.05 · 1 storeTakes 0.63 US qt (0.6 L): buy one 1 L bottle
Fit from: Our specs, from the maker's manual
Air filterTwin Air 150318 air filterfrom $25.65 · 9 stores
- eBay · motorcycleworksCheapest$25.65 ↗Free shipping
- MX Locker$27.91 ↗$18.16 + $9.75 ship
- SoCal Powersports$28.70 ↗$18.95 + $9.75 ship
Show 6 more storesShow fewer stores
Fit from: Twin Air's fitment list for this bike
Their listing: Honda CRF 50, 2000–2021
Spark plugNGK CR6HSAfrom $11.79 · 7 storesThe standard plug from the maker's manual
- Walmart · The D ZoneCheapest$11.79 ↗Free shipping
- MRP Motorsports$4.90 ↗+ shipping (others: ~$7.99)
- Keystone Cycle Parts$12.90 ↗$4.95 + $7.95 ship
Show 4 more storesShow fewer stores
Fit from: Our specs, from the maker's manual
Front sprocketJT Sprockets 14-tooth steel sprocketfrom $11.72 · 1 store14 teeth, the same as the bike came with from the factory. Some stores sell JT's self-cleaning version (part number ending SC): it fits the same.
Part number JTF1256.14: any parts counter can look it up.
Fit from: JT Sprockets' fitment list for this bike
Their listing: Honda CRF50 F-M, 2021
Rear sprocketJT Sprockets 37-tooth steel sprocketfrom $14.37 + shipping · 4 stores37 teeth, the same as the bike came with from the factory. Some stores sell JT's self-cleaning version (part number ending SC): it fits the same.
- SoCal PowersportsCheapest$14.37 ↗+ shipping, if any
- eBay · chainboss$21.00 ↗Free shipping
- MX PowerPlay$21.55 ↗Free shipping
Show 1 more storeShow fewer stores
Part number JTR1213.37: any parts counter can look it up.
Fit from: JT Sprockets' fitment list for this bike
Their listing: Honda CRF50 F-M, 2021
ChainD.I.D 420 D chain, 84 linksfrom $169.79 · 1 storeJT lists 78 links for this bike (count yours to be sure); stores sell this chain at 84. Cut it to length with a chain breaker (any shop can do it): spare links are normal. D.I.D D: a standard 420 chain (D.I.D makes no sealed chain this small). If your manual names a heavy-duty chain (420DS3), that fits the same and lasts longer.
Fit from: JT Sprockets' fitment list for this bike
Their listing: Honda CRF50 F-M, 2021
Tires
Stock sizes, from the maker's manual.
Front tireDunlop Geomax MX34 2.50-10from $59.95 · 2 storesStock size for this bike
Fit from: Size from the maker's manual; tire model is our pick
- Rear tireDunlop Geomax MX34 2.50-10from $59.95 · 2 stores
Stock size for this bike
Fit from: Size from the maker's manual; tire model is our pick
Prices include shipping where the store lists it and were checked Nov 1, 2026. A store that doesn't list its shipping is placed as if it charged what the other stores do. Prices change, so confirm at the store before you buy.
2021 Honda CRF50F vs 2020
Of the specs below, only the price changed: it has a $50 higher MSRP than the 2020 model.
| Spec | 2020 | 2021 | Changed |
|---|---|---|---|
| MSRP | $1,549 | $1,599 | New |
| Displacement | 49cc | Same | |
| Curb weight | 111 lb | Same | |
| Seat height | 21.6 in | Same | |
| Front travel | 3.8 in | Same | |
| Rear travel | 2.8 in | Same | |
| Fuel | 0.69 gal | Same | |
| Gearbox | 3-speed | Same | |
| Front tire | 2.50-10 33J | Same | |
| Rear tire | 2.50-10 33J | Same |
Honda CRF50F FAQ
What engine does the 2021 Honda CRF50F have?
An air-cooled 49cc single-cylinder four-stroke with an SOHC two-valve head and a carburetor, started by kickstarter, with a three-speed gearbox.
Does the 2021 Honda CRF50F have a clutch lever?
No. It has an automatic centrifugal clutch: the rider shifts the three gears with the foot lever, with no clutch lever to work.
What is the seat height of the 2021 Honda CRF50F?
21.6 in.
How much does the 2021 Honda CRF50F weigh?
Honda lists a curb weight of 111 lb, ready to ride with a full tank.
What is the weight limit of the 2021 Honda CRF50F?
88 lb (40 kg), including the rider and any accessories.
Can a parent limit the speed of the 2021 Honda CRF50F?
Yes. It has an adjustable throttle limiter that restricts top speed, and Honda's manual says to use it, with the bike in first gear, until a young rider is familiar with operating the motorcycle.
How much suspension travel does the 2021 Honda CRF50F have?
3.8 in at the front and 2.8 in at the rear.
How much fuel does the 2021 Honda CRF50F hold?
0.69 US gal (2.6 L), including the reserve.
What oil does the 2021 Honda CRF50F take?
SAE 10W-30 motorcycle oil (JASO MA), 0.63 US qt (0.6 L) after draining.
Is the 2021 Honda CRF50F street legal?
No. It is for off-road use only and has no lights.
What was the MSRP of the 2021 Honda CRF50F?
$1,599, plus a $190 destination charge.
What size tires does the 2021 Honda CRF50F use?
2.50-10 33J front and 2.50-10 33J rear.
What spark plug does the 2021 Honda CRF50F take?
NGK CR6HSA (or DENSO U20FSR-U), gapped 0.02 – 0.03 in (0.6 – 0.7 mm).
What chain and sprockets does the 2021 Honda CRF50F use?
A 420 chain on a 14-tooth front and 37-tooth rear sprocket.
Is the 2021 Honda CRF50F different from the 2020 model?
Yes. Among the main specs, only the price changed: it has a $50 higher MSRP than the 2020 model.
Other Honda CRF50F model years
Specs from Honda's owner's manual and Honda's website. Updated .