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Honda CRF150R Expert 2018

Renamed Honda CRF150R Big Wheel for 2020.

Intermediate · 6/10

Motocross / Racing

2018 Honda CRF150R Expert

150cc

4-stroke

187lb

Curb weight

34.1in

Seat height

10.8in

Front travel

5spd

Gearbox

2018 Honda CRF150R Expert overview

The 2018 Honda CRF150R Expert is a competition motocross bike built around a 150 cc liquid-cooled, four-stroke single-cylinder engine with a carburetor, SOHC valve train and four valves. It uses a 5-speed transmission and kick start, with a 37 mm inverted Showa fork and Pro-Link Showa rear shock. Suspension travel is 10.8 in up front and 11.1 in at the rear; fuel capacity is 1.14 gal.

The Expert is the big-wheel version, with 19-inch front and 16-inch rear wheels and a longer swingarm that give it a 34.1 in seat height. It weighs 187 lb and is designed only for competition use by experienced junior riders, with a 150 lb rider weight limit.

Who it's for

This bike is for experienced junior riders racing motocross who need the Expert’s taller seat and big-wheel setup. Its 34.1 in seat height and 187 lb curb weight make it a fit for riders ready to handle a competition-focused motorcycle, rather than beginners looking for a general trail bike. The 150 lb rider weight limit is an important fit constraint.

Quick facts

  • The 2018 Honda CRF150R Expert has a 150cc carbureted 4-stroke engine, a 5-speed gearbox and kick start.
  • The 2018 CRF150R Expert weighs 187 lb ready to ride and has a 34.1 in seat height.
  • The 2018 CRF150R Expert runs 70/100-19 front and 90/100-16 rear tires.
  • The 2018 CRF150R Expert takes 0.59 US qt (0.56 L) of 10W-30 engine oil; change it every 6 races or about 15 hours.
  • The 2018 CRF150R Expert listed at $5,299 (US MSRP). It is not street legal in the US.

2018 Honda CRF150R Expert photos

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2018 Honda CRF150R Expert 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

Frame & steering

Architecture
Semi double cradle
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

2018 Honda CRF150R Expert 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)
Oil filter cover bolts
7.4 ft‑lb (10 N·m, 1.0 kgf·m)
Gearbox oil drain plug
16 ft‑lb (22 N·m, 2.2 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)
Steering stem nut
94 ft‑lb (128 N·m, 13.1 kgf·m)
Handlebar 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)
Brake disc bolts
15 ft‑lb (20 N·m, 2.0 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 bolts
32 ft‑lb (44 N·m, 4.5 kgf·m)
Coolant drain bolt
7.4 ft‑lb (10 N·m, 1.0 kgf·m)

Parts that fit the 2018 Honda CRF150R Expert

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.

2018 Honda CRF150R Expert vs 2017

Of the specs below, only the price changed: it has a $159 higher MSRP than the 2017 model.

Spec20172018Changed
MSRP$5,140$5,299New
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 Expert FAQ

  1. What engine does the 2018 Honda CRF150R Expert have?

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

  2. How tall is the seat on the 2018 Honda CRF150R Expert?

    The seat height is 34.1 in.

  3. How much does the 2018 Honda CRF150R Expert weigh?

    Its curb weight is 187 lb.

  4. How much suspension travel does the 2018 Honda CRF150R Expert have?

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

  5. How much fuel does the 2018 Honda CRF150R Expert hold?

    The fuel capacity is 1.14 gal.

  6. What was the 2018 Honda CRF150R Expert’s MSRP?

    Its MSRP was $5,299.

  7. What transmission does the 2018 Honda CRF150R Expert have?

    It has a 5-speed transmission.

  8. What engine oil does the 2018 Honda CRF150R Expert use?

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

  9. Is the 2018 Honda CRF150R Expert street legal?

    It is not street legal in the US.

  10. How is the 2018 Honda CRF150R Expert different from the CRF150R?

    The Expert has 19/16-inch wheels vs 17/14-inch wheels, a 34.1 in seat height vs 32.8 in, a 187 lb curb weight vs 185 lb, 11.1 in of rear suspension travel vs 10.7 in, and 15/56 sprocket gearing vs 15/50. Its MSRP was $5,299 vs $5,099.

  11. What size tires does the 2018 Honda CRF150R Expert use?

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

  12. What spark plug does the 2018 Honda CRF150R Expert take?

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

  13. What chain and sprockets does the 2018 Honda CRF150R Expert use?

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

  14. Is the 2018 Honda CRF150R Expert different from the 2017 model?

    Yes. Among the main specs, only the price changed: it has a $159 higher MSRP than the 2017 model.

Other Honda CRF150R Expert model years

Specs from Honda's owner's manual and Honda's website. Updated .