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Honda CRF150R Big Wheel 2021

Sold as Honda CRF150R Expert through 2019 and again from 2026.

Intermediate · 6/10

Motocross / Racing

2021 Honda CRF150R Big Wheel

150cc

4-stroke

187lb

Curb weight

34.1in

Seat height

10.8in

Front travel

5spd

Gearbox

2021 Honda CRF150R Big Wheel overview

The 2021 Honda CRF150R Big Wheel is a competition motocross bike powered by a carbureted, liquid-cooled 150 cc single-cylinder four-stroke with a SOHC, four-valve head and five-speed transmission. Its 19-inch front and 16-inch rear wheels, longer swingarm and 34.1 in seat height distinguish this trim and suit taller junior riders. Suspension travel is 10.8 in up front and 11.1 in at the rear, with a 37 mm inverted Showa fork and Pro-Link Showa shock. It has a kick starter, weighs 187 lb and carries 1.14 gal of fuel. Designed only for competition use by experienced junior riders, it has a 150 lb rider weight limit and is not street legal in the US.

Who it's for

This Big Wheel model is for experienced junior riders competing in motocross or other racing, particularly taller riders who fit its higher seat and larger wheels. Its 34.1 in seat height and 187 lb curb weight call for a rider able to manage a relatively tall, substantial competition bike, while the kick start requires starting it by foot. It is not intended for beginners or casual trail riding; the design is focused on competition, with a 150 lb rider weight limit.

Quick facts

  • The 2021 Honda CRF150R Big Wheel has a 150cc carbureted 4-stroke engine, a 5-speed gearbox and kick start.
  • The 2021 CRF150R Big Wheel weighs 187 lb ready to ride and has a 34.1 in seat height.
  • The 2021 CRF150R Big Wheel runs 70/100-19 front and 90/100-16 rear tires.
  • The 2021 CRF150R Big Wheel takes 0.59 US qt (0.56 L) of 10W-30 engine oil; change it every 6 races or about 15 hours.
  • The 2021 CRF150R Big Wheel listed at $5,399 (US MSRP). It is not street legal in the US.

2021 Honda CRF150R Big Wheel photos

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2021 Honda CRF150R Big Wheel specifications

Engine

Displacement
150cc
Stroke
4-stroke
Fuel system
Carburetor
Bore × stroke
66 × 43.7 mm
Compression
11.7:1
Cooling
Liquid
Configuration
Single-cylinder
Valve train
SOHC
Valves
4
Oil chamber
Dual
Engine oil
0.59 US qt (0.56 L)
Oil type
10W-30
Gearbox oil
0.60 US qt (0.57 L)
Gearbox oil type
SAE 10W-30, JASO T 903 standard MA
Coolant
0.80 US qt (0.76 L)

Clutch

Type
Wet multiplate
Actuation
Cable
Assist
None (standard clutch)

Drivetrain

Starting
Kick
Transmission
5-speed
Chain size
420
Chain links
126
Front sprocket
15T
Rear sprocket
56T

Dimensions

Seat height
34.1″
Ground clearance
13.2″
Wheelbase
50.6″
Width
30.3″
Height
46.1″
Length
74.8″
Curb weight
187 lb
Fuel capacity
1.14 gal

Price & warranty

Colors
Red
Warranty
Sold “as is” with no warranties.

Frame & steering

Rake
27.8°
Trail
3.8″

Suspension

Front
37mm inverted Showa fork
Front travel
10.8″
Rear
Pro-Link Showa single shock
Rear travel
11.1″

Wheels & tires

Front wheel
19″
Rear wheel
16″
Front tire
70/100-19 42M Dunlop MX71F
Rear tire
90/100-16 52M Dunlop MX71

Brakes

Front disc
220 mm
Rear disc
190 mm

Stock features

Street legal (US)
No

2021 Honda CRF150R Big Wheel maintenance

From the maker's manuals. Tap a row to see the manual page.

Service intervals

Change engine oil (first time)
After the first break-in ride
Change engine oil
Every 6 races or about 15 hours
Replace oil filter (first time)
After the first break-in ride
Replace oil filter
Every 6 races or about 15 hours
Inspect gearbox oil
Every race or about 2.5 hours
Change gearbox oil
Every 6 races or about 15 hours
Clean air filter
Every race or about 2.5 hours
Clean air filter
Every moto (dusty riding conditions)
Inspect spark plug
Every race or about 2.5 hours
Replace piston and rings
Every 6 races or about 15 hours

Spark plug

Spark plug
NGK CR8EH-9
Plug gap
0.031 – 0.035 in (0.8 – 0.9 mm)
Spark plug (alternative)
DENSO U24FER9
Spark plug (optional)
NGK CR9EH-9
Spark plug (optional, alternative)
DENSO U27FER9

Torque specs

Oil drain bolt
16 ft‑lb (22 N·m, 2.2 kgf·m)
Gearbox oil drain plug
16 ft‑lb (22 N·m, 2.2 kgf·m)
Spark plug
12 ft‑lb (16 N·m, 1.6 kgf·m)
Front axle nut
51 ft‑lb (69 N·m, 7.0 kgf·m)
Rear axle nut
65 ft‑lb (88 N·m, 9.0 kgf·m)
Upper triple clamp bolts
16 ft‑lb (22 N·m, 2.2 kgf·m)
Lower triple clamp bolts
16 ft‑lb (22 N·m, 2.2 kgf·m)
Front brake caliper mounting bolts
22 ft‑lb (30 N·m, 3.1 kgf·m)
Rear sprocket nuts
24 ft‑lb (32 N·m, 3.3 kgf·m)
Front sprocket bolt
9.6 ft‑lb (13 N·m, 1.3 kgf·m)
Chain adjuster locknut
20 ft‑lb (27 N·m, 2.8 kgf·m)
Shock absorber mounting nuts
32 ft‑lb (44 N·m, 4.5 kgf·m)

Parts that fit the 2021 Honda CRF150R 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.

Tires

Stock sizes, from the maker's manual.

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 CRF150R Big Wheel vs 2020

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

Spec20202021Changed
MSRP$5,299$5,399New
Displacement150ccSame
Curb weight187 lbSame
Seat height34.1 inSame
Front travel10.8 inSame
Rear travel11.1 inSame
Fuel1.14 galSame
Gearbox5-speedSame
Front tire70/100-19 42M Dunlop MX71FSame
Rear tire90/100-16 52M Dunlop MX71Same

Honda CRF150R Big Wheel FAQ

  1. What engine does the 2021 Honda CRF150R Big Wheel have?

    It has a carbureted, liquid-cooled 150 cc single-cylinder four-stroke engine with SOHC and four valves.

  2. What engine oil does the 2021 Honda CRF150R Big Wheel use?

    It uses 10W-30 engine oil, with a capacity of 0.6 US qt (0.56 L).

  3. What is the seat height of the 2021 Honda CRF150R Big Wheel?

    The seat height is 34.1 in.

  4. How much does the 2021 Honda CRF150R Big Wheel weigh?

    Its curb weight is 187 lb.

  5. How much suspension travel does the 2021 Honda CRF150R Big Wheel have?

    It has 10.8 in of front travel and 11.1 in of rear travel.

  6. What is the fuel capacity of the 2021 Honda CRF150R Big Wheel?

    Fuel capacity is 1.14 gal.

  7. Is the 2021 Honda CRF150R Big Wheel street legal?

    It is not street legal in the US.

  8. What was the MSRP of the 2021 Honda CRF150R Big Wheel?

    Its MSRP was $5,399.

  9. How is the 2021 Honda CRF150R Big Wheel different from the CRF150R?

    It has 19-inch front and 16-inch rear wheels vs 17 in and 14 in, a 34.1 in seat vs 32.8 in, and weighs 187 lb vs 185 lb. Rear suspension travel is 11.1 in vs 10.7 in, and final reduction is 3.733:1 vs 3.333:1. Its MSRP was $5,399 vs $5,199.

  10. What size tires does the 2021 Honda CRF150R Big Wheel use?

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

  11. What spark plug does the 2021 Honda CRF150R Big Wheel take?

    NGK CR8EH-9 (or DENSO U24FER9), gapped 0.031 – 0.035 in (0.8 – 0.9 mm).

  12. What chain and sprockets does the 2021 Honda CRF150R Big Wheel use?

    A 420 chain with 126 links on a 15-tooth front and 56-tooth rear sprocket.

  13. Is the 2021 Honda CRF150R Big Wheel different from the 2020 model?

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

Other Honda CRF150R Expert model years

Specs from Honda's owner's and service manuals and Honda's website. Updated .