What engine does the 2021 Honda CRF125F Big Wheel have?

A fuel-injected, air-cooled 125cc single-cylinder four-stroke with an SOHC two-valve head, electric start with a kickstart backup and a four-speed gearbox with a manual clutch.

How is the 2021 Honda CRF125F Big Wheel different from the standard CRF125F?

It has bigger wheels (19-inch front and 16-inch rear, against 17 and 14), a longer swingarm, different gearing and more suspension travel (6.7 in front and 6.6 in rear, against 5.9 and 5.5 on the standard CRF125F). Its seat is 1.8 inches higher at 30.9 inches, and it has more ground clearance. The engine and frame are the same.

How much does the 2021 Honda CRF125F Big Wheel weigh?

Honda lists a curb weight of 199 lb, ready to ride with a full tank.

How much rider weight can the 2021 Honda CRF125F Big Wheel carry?

Honda's maximum is 194 lb (88 kg), including the rider and any accessories. It is built for one rider, with no passenger.

How much suspension travel does the 2021 Honda CRF125F Big Wheel have?

6.7 in at the front and 6.6 in at the rear.

What oil does the 2021 Honda CRF125F Big Wheel take?

SAE 10W-30 motorcycle oil (JASO MA), 0.9 US qt (0.85 L) after draining.

Is the 2021 Honda CRF125F Big Wheel street legal?

No. It is for off-road use only and has no lights, so it is not street legal in the US.

What was the MSRP of the 2021 Honda CRF125F Big Wheel?

$3,599, plus a $190 destination charge.

What size tires does the 2021 Honda CRF125F Big Wheel use?

70/100-19 front and 90/100-16 rear.

What spark plug does the 2021 Honda CRF125F Big Wheel take?

CPR6EA-9 (NGK), gapped 0.031 – 0.035 in (0.8 – 0.9 mm).

What chain and sprockets does the 2021 Honda CRF125F Big Wheel use?

A 428 chain on a 13-tooth front and 49-tooth rear sprocket.

Is the 2021 Honda CRF125F Big Wheel different from the 2020 model?

Among the main specs, only the price changed: it has a $100 higher MSRP than the 2020 model.

Honda CRF125F Big Wheel 2021

Beginner · 2/10

Trail

125cc

4-stroke

199lb

Curb weight

30.9in

Seat height

6.7in

Front travel

4spd

Gearbox

2021 Honda CRF125F Big Wheel overview

The 2021 Honda CRF125F Big Wheel is the taller version of Honda's CRF125F trail bike: 19-inch front and 16-inch rear wheels (the standard CRF125F has 17 and 14), a 30.9-inch seat that is 1.8 inches higher, 10.3 inches of ground clearance and more suspension travel, 6.7 inches front and 6.6 inches rear. Its fuel-injected, air-cooled 125cc single has an SOHC two-valve head, electric start with a kickstart backup and a four-speed gearbox with a manual clutch, in a twin-spar steel frame with a 220 mm front disc brake. Mechanically, the 2021 model is the same as the 2019 update.

Who it's for

For beginners and younger riders who are ready for a clutch and gears but have outgrown the standard CRF125F: Honda calls the CRF125F an ideal bike for younger, beginning riders, and the Big Wheel's taller seat and bigger wheels fit taller riders. Honda's weight limit is 194 lb (88 kg), including the rider and any accessories. It is for off-road trail riding only, not the street.

Quick facts

The 2021 Honda CRF125F Big Wheel has a 125cc fuel-injected 4-stroke engine, a 4-speed gearbox and electric and kick start.
The 2021 CRF125F Big Wheel weighs 199 lb ready to ride and has a 30.9 in seat height.
The 2021 CRF125F Big Wheel runs 70/100-19 front and 90/100-16 rear tires.
The 2021 CRF125F Big Wheel takes 0.9 US qt (0.85 L) of 10W-30 engine oil; change it every 600 mi or 6 months.
The 2021 CRF125F Big Wheel lists at $3,599 (US MSRP). It is not street legal in the US.

2021 Honda CRF125F Big Wheel specifications

Engine

Displacement: 125cc
Stroke: 4-stroke
Fuel system: Fuel injection
Bore × stroke: 52.4 × 57.9 mm
Compression: 9.0:1
Cooling: Air
Configuration: Single-cylinder
Valve train: SOHC
Valves: 2
Engine oil: 0.9 US qt (0.85 L)
Oil type: 10W-30

Clutch

Type: Wet multiplate
Actuation: Cable
Assist: None (standard clutch)

Drivetrain

Starting: Electric and kick
Transmission: 4-speed
Chain size: 428
Front sprocket: 13T
Rear sprocket: 49T

Dimensions

Seat height: 30.9″
Ground clearance: 10.3″
Wheelbase: 49.4″
Width: 30.3″
Height: 42.1″
Length: 73″
Curb weight: 199 lb
Fuel capacity: 0.98 gal

Price & warranty

Destination charge: $190
Colors: Red
Warranty: 6 months · transferable limited warranty

Equipment

Spark arrester: Standard
Ignition key: Standard
Low-fuel indicator light: Standard
Adjustable front brake lever: Standard

Frame & steering

Frame material: Steel
Architecture: Perimeter
Rake: 27.5°
Trail: 3.7″

Suspension

Front: 31 mm conventional telescopic fork
Front travel: 6.7″
Rear: Pro-Link single shock
Rear travel: 6.6″

Wheels & tires

Front wheel: 19″
Rear wheel: 16″
Front tire: 70/100-19M/C 42M
Rear tire: 90/100-16M/C 51M

Brakes

Front disc: 220 mm

Stock features

Street legal (US): No

Battery / electrical

Battery: Yes
OEM battery: YTZ4V
Chemistry: Lead acid
Voltage: 12V
Capacity: 3 Ah

2021 Honda CRF125F Big Wheel 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: CPR6EA-9 (NGK)
Plug gap: 0.031 – 0.035 in (0.8 – 0.9 mm)

Torque specs

Oil drain bolt: 18 ft‑lb (24 N·m, 2.4 kgf·m)
Spark arrester mount bolts: 7.4 ft‑lb (10 N·m, 1.0 kgf·m)
Front axle nut: 46 ft‑lb (62 N·m, 6.3 kgf·m)
Rear axle nut: 46 ft‑lb (62 N·m, 6.3 kgf·m)

Parts that fit the 2021 Honda CRF125F Big Wheel

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 $30.10 · 5 stores
Takes 0.9 US qt (0.85 L): buy one 1 L bottle
Show 2 more storesShow fewer stores
- Speed Addicts$34.05 ↗$26.06 + $7.99 ship
- Summit Racing$40.05 ↗$26.06 + $13.99 ship
Fit from: Our specs, from the maker's manual
Air filterTwin Air 150010 air filterfrom $39.99 · 5 stores
Replaces the maker's part 17213-K28-910
Show 2 more storesShow fewer stores
- Summit Racing$53.98 ↗$39.99 + $13.99 ship
- Spaz Cycle$54.90 ↗$38.95 + $15.95 ship
Fit from: Twin Air's fitment list for this bike
Their listing: Honda CRF 125F, 2014–2026 (replaces the maker's 17213-K28-910) (listed for the CRF125F: Honda's parts listings give the CRF125F Big Wheel the CRF125F's air filter (17213-K28-910))
Spark plugNGK CPR6EA-9from $8.89 · 4 stores
The standard plug from the maker's manual
Show 1 more storeShow fewer stores
- MRP Motorsports$12.47 ↗+ shipping (others: ~$7.99)
Fit from: Our specs, from the maker's manual
BatteryYTZ4V batteryfrom $99.70 · 13 stores
Show 10 more storesShow fewer stores
Part number YTZ4V: any parts counter can look it up.
Fit from: Our specs, from the maker's manual

Not listed yet: Front sprocket, rear sprocket, front tire, rear tire and front brake pads. We only list a part once its maker names it for this bike, so we don't guess.

Prices include shipping where the store lists it and were checked Oct 31, 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 CRF125F Big Wheel vs 2020

Of the specs below, only the price changed: it has a $100 higher MSRP than the 2020 model.

Spec	2020	2021	Changed
MSRP	$3,499	$3,599	New
Displacement	125cc	Same
Curb weight	199 lb	Same
Seat height	30.9 in	Same
Front travel	6.7 in	Same
Rear travel	6.6 in	Same
Fuel	0.98 gal	Same
Gearbox	4-speed	Same
Front tire	70/100-19M/C 42M	Same
Rear tire	90/100-16M/C 51M	Same

Honda CRF125F Big Wheel FAQ

What engine does the 2021 Honda CRF125F Big Wheel have?
A fuel-injected, air-cooled 125cc single-cylinder four-stroke with an SOHC two-valve head, electric start with a kickstart backup and a four-speed gearbox with a manual clutch.
How is the 2021 Honda CRF125F Big Wheel different from the standard CRF125F?
It has bigger wheels (19-inch front and 16-inch rear, against 17 and 14), a longer swingarm, different gearing and more suspension travel (6.7 in front and 6.6 in rear, against 5.9 and 5.5 on the standard CRF125F). Its seat is 1.8 inches higher at 30.9 inches, and it has more ground clearance. The engine and frame are the same.
What is the seat height of the 2021 Honda CRF125F Big Wheel?
30.9 in.
How much does the 2021 Honda CRF125F Big Wheel weigh?
Honda lists a curb weight of 199 lb, ready to ride with a full tank.
How much rider weight can the 2021 Honda CRF125F Big Wheel carry?
Honda's maximum is 194 lb (88 kg), including the rider and any accessories. It is built for one rider, with no passenger.
How much suspension travel does the 2021 Honda CRF125F Big Wheel have?
6.7 in at the front and 6.6 in at the rear.
How much fuel does the 2021 Honda CRF125F Big Wheel hold?
0.98 US gal (3.7 L).
What oil does the 2021 Honda CRF125F Big Wheel take?
SAE 10W-30 motorcycle oil (JASO MA), 0.9 US qt (0.85 L) after draining.
Is the 2021 Honda CRF125F Big Wheel street legal?
No. It is for off-road use only and has no lights, so it is not street legal in the US.
What was the MSRP of the 2021 Honda CRF125F Big Wheel?
$3,599, plus a $190 destination charge.
What size tires does the 2021 Honda CRF125F Big Wheel use?
70/100-19 front and 90/100-16 rear.
What spark plug does the 2021 Honda CRF125F Big Wheel take?
CPR6EA-9 (NGK), gapped 0.031 – 0.035 in (0.8 – 0.9 mm).
What chain and sprockets does the 2021 Honda CRF125F Big Wheel use?
A 428 chain on a 13-tooth front and 49-tooth rear sprocket.
Is the 2021 Honda CRF125F Big Wheel different from the 2020 model?
Among the main specs, only the price changed: it has a $100 higher MSRP than the 2020 model.

Other Honda CRF125F Big Wheel model years

Specs from Honda's owner's manual and Honda's website. Updated Oct 31, 2026.