Yamaha YZ125 Specs

2016 - 2022 • 3 variants

The Yamaha YZ125 is a motocross bike produced from 2016 to 2022 across 3 variants. It is powered by a reed-valve-inducted displacing 124.00 cc.

About the Yamaha YZ125

Yamaha introduced the YZ125 as part of their Cross / motocross range, with production running from 2002 to 2023. This technical reference page documents the full specification sheet for the Yamaha YZ125, including engine displacement, power and torque figures, frame and suspension geometry, braking systems, and overall dimensions. Select a model year above to view year-specific technical data. Specifications are compiled from official manufacturer sources.

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Yamaha YZ125 by Year

2022 Yamaha YZ125 View specs →

2020 Yamaha YZ125 View specs →

2016 Yamaha YZ125 View specs →

Spec Evolution

How key specs changed across production years.

Specification	2002	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Oil Capacity (Quarts)	-	-	-	-	-	-	-	-	0.05 quarts	-	-	-	-	-	0.05 quarts	0.05 quarts	0.74 US quarts ↑	0.74 US quarts	0.74 US quarts	0.74 US quarts	0.74 US quarts
Ground Clearance (mm)	400 mm	398 mm ↓	401 mm ↑	388 mm ↓	386 mm ↓	386 mm	386 mm	386 mm	386 mm	386 mm	386 mm	386 mm	366 mm ↓	366 mm	366 mm	366 mm	366 mm	366 mm	366 mm	366 mm	366 mm
Ground Clearance (in.)	15.7 inches	15.7 inches	15.8 inches ↑	15.3 inches ↓	15.2 inches ↓	15.2 inches	15.2 inches	15.2 inches	15.2 inches	15.2 inches	15.2 inches	15.2 inches	14.4 inches ↓	14.4 inches	14.4 inches	14.4 inches	14.4 inches	14.4 inches	14.4 inches	14.4 inches	14.4 inches
Engine Type	Single cylinder	Single cylinder	Single cylinder	V2	Single cylinder	Single cylinder	Single cylinder	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke	Single cylinder, two-stroke
Displacement (ci)	7.57 cubic inches	7.57 cubic inches	7.57 cubic inches	7.57 cubic inches	7.57 cubic inches	7.57 cubic inches	7.57 cubic inches	7.57 cubic inches	7.57 cubic inches	7.57 cubic inches	7.57 cubic inches	7.57 cubic inches	-	-	7.57 cubic inches	-	7.63 cubic inches	7.63 cubic inches	7.63 cubic inches	7.63 cubic inches	7.63 cubic inches
Displacement (cc)	124.00 cc	124.00 cc	124.00 cc	124.00 cc	124.00 cc	124.00 cc	124.00 cc	124.00 cc	124.00 cc	124.00 cc	124.00 cc	124.00 cc	-	-	124.00 cc	-	125.0 cc	125.0 cc	125.0 cc	125.0 cc	125.0 cc
Fuel Control	-	-	-	-	-	-	-	-	Double Overhead Cams/Twin Cam (DOHC)	Double Overhead Cams/Twin Cam (DOHC)	Single Overhead Cams (SOHC)	-	-	-	-	-	-	-	-	-	-
Stroke	2	2	2	4 ↑	4	4	2 ↓	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Frame Type	-	Fron	-	-	-	-	-	-	Aluminium	Hybrid steel and aluminum frame with a Controlled- Fill aluminum subframe and cast aluminum swingarm	Aluminum	Aluminum	Aluminum	Aluminum	Semi-double cradle aluminium frame	Semi-double cradle aluminium frame	Semi-double cradle aluminium frame	Semi-double cradle aluminium frame	Semi-double cradle aluminium frame	Aluminum semi-double cradle	Aluminum semi-double cradle
Seat Height	994 mm / 39.1 in.	992 mm / 39.1 in. ↓	993 mm / 39.1 in. ↑	998 mm / 39.3 in. ↑	998 mm / 39.3 in.	998 mm / 39.3 in.	998 mm / 39.3 in.	998 mm / 39.3 in.	998 mm / 39.3 in.	998 mm / 39.3 in.	998 mm / 39.3 in.	998 mm / 39.3 in.	975 mm / 38.4 in. ↓	975 mm / 38.4 in.	975 mm / 38.4 in.	975 mm / 38.4 in.	975 mm / 38.4 in.	975 mm / 38.4 in.	975 mm / 38.4 in.	39 mm / 1.5 in. ↓	980 mm / 38.6 in. ↑
Dry Weight	87.5 kg / 192.9 lbs	87 kg / 191.8 lbs ↓	-	86 kg / 189.6 lbs	86.2 kg / 190.0 lbs ↑	86.2 kg / 190.0 lbs	-	-	-	-	210.5 kg / 464.1 lbs	59 kg / 130.1 lbs ↓	-	-	-	-	-	-	-	-	-
Engine Detail	-	-	-	-	-	-	-	-	-	Reed-valve inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted	Reed-valve-inducted
Wheelbase	1,444 mm / 56.9 in.	1,438 mm / 56.6 in.	-	1,443 mm / 56.8 in.	1,443 mm / 56.8 in.	1,443 mm / 56.8 in.	1,443 mm / 56.8 in.	1,443 mm / 56.8 in.	1,443 mm / 56.8 in.	1,443 mm / 56.8 in.	1,443 mm / 56.8 in.	1,443 mm / 56.8 in.	1,443 mm / 56.8 in.	1,443 mm / 56.8 in.	1,443 mm / 56.8 in.	1,443 mm / 56.8 in.	1443 mm / 56.8 in. ↑	1443 mm / 56.8 in.	1443 mm / 56.8 in.	1445 mm / 56.9 in. ↑	1445 mm / 56.9 in.
Brakes - Front	Single disc	Single disc	Single disc	Single disc	Single disc	Single disc	Single disc	Single disc	Single disc. Wave	Single disc. Hydraulic	Single disc. Hydraulic disc. Hydraulic disc.	Single disc. Hydraulic disc. Hydraulic disc.	Single disc. Hydraulic.	Single disc. Hydraulic.	Single disc. Hydraulic.	Single disc. Hydraulic.	Single disc. Hydraulic.	Single disc. Hydraulic.	Single disc. Hydraulic.	Single disc. Hydraulic.	Single disc. Hydraulic.
Brakes - Rear	Single disc	Single disc	Single disc	Single disc	Single disc	Single disc	Single disc	Single disc	Single disc. Wave	Single disc. Hydraulic	Single disc	Single disc	Single disc. Hydraulic.	Single disc. Hydraulic.	Single disc. Hydraulic.	Single disc. Hydraulic.	Single disc. Hydraulic.	Single disc. Hydraulic.	Single disc. Hydraulic.	Single disc. Hydraulic.	Single disc. Hydraulic.
Fuel Capacity	-	-	7.94 litres / 2.10 gallons	8.00 litres / 2.11 gallons ↑	7.94 litres / 2.10 gallons ↓	7.94 litres / 2.10 gallons	7.94 litres / 2.10 gallons	7.94 litres / 2.10 gallons	7.95 litres / 2.10 gallons	7.95 litres / 2.10 gallons	7.95 litres / 2.10 gallons	7.95 litres / 2.10 gallons	7.95 litres / 2.10 gallons	7.95 litres / 2.10 gallons	8.00 litres / 2.11 gallons ↑	8.00 litres / 2.11 gallons	8.00 litres / 2.11 US gallons	8.00 litres / 2.11 US gallons	8.00 litres / 2.11 US gallons	6.81 litres / 1.80 US gallons ↓	6.81 litres / 1.80 US gallons
Suspension - Front	-	Telescopic fork	48mm Kayaba inverted cartridge fork w/adjustable compression and rebound damping	Telescopic fork	Telescopic Fork, coil spring/oil damper, 11.8´	Speed-sensitive system inverted fork	Speed-sensitive system inverted fork	Speed-sensitive system inverted fork	Speed-sensitive system inverted fork	Speed-sensitive system inverted fork	Speed-sensitive system inverted fork	Speed-sensitive system inverted fork	Speed-sensitive system inverted fork	Speed-sensitive system inverted fork	Speed-sensitive system inverted fork	KYB® Speed-Sensitive System inverted fork; fully adjustable	KYB® Speed-Sensitive System inverted fork; fully adjustable	KYB® Speed-Sensitive System inverted fork; fully adjustable	KYB® Speed-Sensitive System inverted fork; fully adjustable	KYB® Speed-Sensitive System inverted fork; fully adjustable	KYB® Speed-Sensitive System inverted fork; fully adjustable
Suspension - Rear	-	Swinging arm (Monocross)	Kayaba single shock w/adjustable preload, compression and rebound damping and separate hi/lo-speed compression adjusters	Swinging arm (link-type monocross)	Swingarm (link, suspension), coil spring/gas-oil damper, 12.4´	Fully adjustable single shock	Fully adjustable single shock	Fully adjustable single shock	Fully adjustable single shock	Fully adjustable single shock	Fully adjustable single shock	Fully adjustable single shock	Fully adjustable single shock	Fully adjustable single shock	Fully adjustable single shock	KYB® single shock; fully adjustable	KYB® single shock; fully adjustable	KYB® single shock; fully adjustable	KYB® single shock; fully adjustable	KYB® single shock; fully adjustable	KYB® single shock; fully adjustable
Top Speed	-	-	-	-	-	-	-	-	-	-	-	120.0 km/h / 74.6 mph	-	-	-	-	96.0 km/h / 59.7 mph	-	-	-	-
Fuel System	-	-	Carburettor	Carburettor. Mikuni TMX38	-	-	Carburettor. Mikuni® TMX 38	Carburettor. Mikuni® TMX 38	Carburettor. Mikuni TMX 38	Carburettor. Mikuni TMX 38	Carburettor. Mikuni TMX 38	Carburettor. Mikuni TMX 38	Carburettor. Mikuni TMX 38	Carburettor. Mikuni TMX 38	Carburettor. Mikuni TMX 38	Carburettor. Mikuni TMX 38	Carburettor. Mikuni TMX 38	Carburettor. Mikuni TMX 38	Carburettor. Mikuni TMX 38	Carburettor. Keihin PWK38S	Carburettor. Hitachi Astemo® Keihin PWK38S carburetor
Colours	-	Blue	Team Yamaha Blue/White	-	-	Blue/white	Team Yamaha Blue/White	Team Yamaha Blue/White	Team Yamaha Blue/White	Blue/White	Team Yamaha Blue/White	Team Yamaha Blue/White	Team Yamaha Blue/White	Team Yamaha Blue/White	Blue/White	Team Yamaha Blue	Team Yamaha Blue	Team Yamaha Blue	Team Yamaha Blue	Team Yamaha Blue	Team Yamaha Blue
Clutch	-	-	-	Wet, multiple-disc	-	-	-	-	-	Multiplate, wet	-	No clutch	-	-	-	Multiplate wet clutch	Multiplate wet clutch	Multiplate wet clutch	Multiplate wet clutch	Multiplate wet clutch	Multiplate wet clutch
Final Drive	-	-	Chain	Chain	Chain	Chain	Chain	Chain	Chain	Chain	Chain	Chain	Chain	Chain	Chain	Chain	Chain (final drive)	Chain (final drive)	Chain (final drive)	Chain (final drive)	Chain (final drive)
Rims	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	Dunlop® MX52	Dunlop® MX52 ↓	Dunlop® MX52	Dunlop® MX52 tires	-	Bridgestone® Battlecross X20 tires.
Height	1,311 mm / 51.6 in.	1,311 mm / 51.6 in.	1,318 mm / 51.9 in.	1,318 mm / 51.9 in.	1,316 mm / 51.8 in.	1,316 mm / 51.8 in.	1,316 mm / 51.8 in.	1,316 mm / 51.8 in.	1,316 mm / 51.8 in.	1,316 mm / 51.8 in.	1,316 mm / 51.8 in.	1,316 mm / 51.8 in.	1,295 mm / 51.0 in. ↓	1,295 mm / 51.0 in.	1,295 mm / 51.0 in.	1,295 mm / 51.0 in.	1295 mm / 51.0 in. ↑	1295 mm / 51.0 in.	1295 mm / 51.0 in.	1295 mm / 51.0 in.	1295 mm / 51.0 in.
Length	2,130 mm / 83.9 in.	2,130 mm / 83.9 in.	2,134 mm / 84.0 in.	2,139 mm / 84.2 in.	2,136 mm / 84.1 in.	2,136 mm / 84.1 in.	2,136 mm / 84.1 in.	2,136 mm / 84.1 in.	2,136 mm / 84.1 in.	2,136 mm / 84.1 in.	2,136 mm / 84.1 in.	2,136 mm / 84.1 in.	2,136 mm / 84.1 in.	2,136 mm / 84.1 in.	2,136 mm / 84.1 in.	2,136 mm / 84.1 in.	2136 mm / 84.1 in. ↑	2136 mm / 84.1 in.	2136 mm / 84.1 in.	2136 mm / 84.1 in.	2136 mm / 84.1 in.
Wet Weight	-	-	-	-	-	-	94.3 kg / 208.0 lbs	94.3 kg / 208.0 lbs	94.4 kg / 208.0 lbs ↑	94.4 kg / 208.0 lbs	93.9 kg / 207.0 lbs ↓	93.9 kg / 207.0 lbs	94.8 kg / 209.0 lbs ↑	94.8 kg / 209.0 lbs	94.8 kg / 209.0 lbs	93.9 kg / 207.0 lbs ↓	93.9 kg / 207.0 lbs	93.9 kg / 207.0 lbs	93.9 kg / 207.0 lbs	94.8 kg / 209.0 lbs ↑	94.8 kg / 209.0 lbs
Warranty	-	-	-	-	-	-	-	-	30 Day (Limited Factory Warranty)	30 Days	30 Day (Limited Factory Warranty)	30 Day (Limited Factory Warranty)	30 Day Limited Factory Warranty	30 Day Limited Factory Warranty	30 Day Limited Factory Warranty	30 Day Limited Factory Warranty	30 Day Limited Factory Warranty	30 Day Limited Factory Warranty	30 Day Limited Factory Warranty	30 Day Limited Factory Warranty	30 Day Limited Factory Warranty
Compression Ratio	8.7:1	8.7:1	8.7:1	8.6:1 ↓	8.6:1	8.6:1	8.6:1	8.6:1	8.6:1	8.6:1	8.6:1	8.6:1	8.6:1	8.6:1	10.7:1 ↑	10.7:1	10.7:1	10.7:1	10.7:1	10.7:1	10.1:1 ↓
Tyres - Front	80/100-21 51M	80/90-21	80/80-21	80/90-M21	80/80-M21	80/80-M21	80/80-M21	80/100-M21	21/7-10 ↓	80/100-21 ↑	21/7-10 ↓	100/80-10 ↑	80/100-21 ↓	80/100-21	80/100-21	80/100-21	80/100-21	80/100-21	80/100-21	80/100-21	80/100-21
Engine Lubrication	-	-	-	Premix	-	-	-	-	Dry sump	Wet sump	-	-	-	-	Premix	Premix	Premix	Premix	Premix	Premix	Premix
Width	827 mm / 32.6 in.	827 mm / 32.6 in.	828 mm / 32.6 in. ↑	827 mm / 32.6 in. ↓	828 mm / 32.6 in. ↑	828 mm / 32.6 in.	828 mm / 32.6 in.	828 mm / 32.6 in.	828 mm / 32.6 in.	1,171 mm / 46.1 in. ↓	828 mm / 32.6 in. ↑	828 mm / 32.6 in.	828 mm / 32.6 in.	828 mm / 32.6 in.	828 mm / 32.6 in.	828 mm / 32.6 in.	828 mm / 32.6 in.	828 mm / 32.6 in.	828 mm / 32.6 in.	826 mm / 32.5 in. ↓	826 mm / 32.5 in.
Gearbox	-	-	5-speed	5-speed	6-speed ↑	6-speed	6-speed	6-speed	6-speed	6-speed	6-speed	6-speed	6-speed	6-speed	6-speed	6-speed	6-speed	6-speed	6-speed	6-speed	6-speed
Tyres - Rear	100/90-19 57M	100/90-19	100/90-19	100/90-M19	100/90-M19	100/90-M19	100/90-M19	100/90-M19	100/90-M19	100/90-19	100/90-19	130/60-13 ↑	100/90-19 ↓	100/90-19	100/90-19	100/90-19	-	-	-	-	-
Primary Drive	-	-	-	-	-	-	-	-	2WD; Sealed O-Ring Chain, Eccentric Adjustment	2WD; Sealed O-Ring Chain, Eccentric Adjustment	-	-	-	-	-	-	-	-	-	Constant-mesh	Constant-mesh
Rake	-	-	27.1°	-	-	26.0°	-	-	-	-	28.0°	28.0°	28.0°	28.0°	26.0° ↓	26.0°	26.0°	26.0°	26.0°	26.0°	26.0°
Lighting system	-	-	-	-	-	-	-	-	Dual 30W Krypton multireflector Headlights and 3.9/0.5W LED Brake light	Dual 30W Krypton multireflector Headlights and 3.9/0.5W LED Brake light	-	LED lights	-	-	-	-	-	-	-	-	-
Seat	-	-	-	-	-	-	-	-	-	-	2-person seat	2 people seat	-	-	-	-	-	-	-	-	-
Wheel Travel - Rear	315 mm / 12.4 in.	315 mm / 12.4 in.	315 mm / 12.4 in.	125 mm / 4.9 in. ↓	-	315 mm / 12.4 in.	315 mm / 12.4 in.	315 mm / 12.4 in.	315 mm / 12.4 in.	315 mm / 12.4 in.	315 mm / 12.4 in.	315 mm / 12.4 in.	315 mm / 12.4 in.	315 mm / 12.4 in.	315 mm / 12.4 in.	315 mm / 12.4 in.	315 mm / 12.4 in.	315 mm / 12.4 in.	315 mm / 12.4 in.	315 mm / 12.4 in.	315 mm / 12.4 in.
Ignition	-	-	-	CDI	CDI	-	CDI	CDI	CDI	CDI	CDI	Digital CDI	CDI	CDI	CDI	CDI	CDI	CDI	CDI	Digital CDI	Digital CDI
Power-to-Weight Ratio	-	-	-	-	-	-	-	-	-	-	0.1143 HP/kg	0.1819 HP/kg ↑	-	-	-	-	-	-	-	-	-
Starter	-	-	-	Kick	-	-	-	-	Electric	Electric	Electric	Electric	Electric	Kick	Kick	Kick	Kick	Kick	Kick	Kick	Kick
Valve System	-	-	1	-	-	-	-	-	-	5	-	-	-	-	-	-	-	-	-	-	-

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