Motocross · Trail · Electric

Your dirt bike, dialed in.

Stock specs, parts by size and free setup tools for motocross, trail and electric riders. Every number shows the maker’s page it came from and the date we checked it.

Your bike

Find your bike

Stock specs with their pages, parts at stock size and the tools set up for your bike. Remembered for next time.

Sizing a kid’s bike

Small bikes lined up by seat height against that inseam, each height sourced, then the first-ride gear list.

Parts by stock size

Your bike’s stock size, the manual page it came from, and where to check prices.

Where to ride

Public riding areas and tracks on a map, with the permits the state asks for, each quoted from its own page.

  • 150 bikes in the Garage
  • 69 read from the manual
  • 11 free setup tools
  • 6 part types by stock size

Buying a first bike

Size it. Gear up. Ride.

For parents: seat heights with their sources, then the gear a first ride needs. The numbers are yours to weigh; we never say which bike suits a rider.

Seat heights, lowest first

Youth bikes page
BikeSeatInchesSource
GasGas MC-E 2 2027470–500 mm18.5–19.7 inManual p. 73
Husqvarna EE 2 2027470–500 mm18.5–19.7 inManual p. 77
KTM SX-E 2 2027470–500 mm18.5–19.7 inManual p. 73
Yamaha PW50 2027475 mm18.7 inManual p. 9-1
Honda CRF50F 2023549 mm21.6 inSpec sheet (research)
Honda CRF50F 2024549 mm21.6 inSpec sheet (research)
Honda CRF50F 2026549 mm21.6 inSpec sheet (research)
Husqvarna EE 3 2024555–600 mm21.9–23.6 inSpec sheet (research)

All 51 youth bikes by seat height

Parts by stock size

Example: Yamaha YZ250F 2027

One bike’s stock sizes as it left the factory, each with its source. Find your own bike to see its sizes.

We earn a commission if you buy through these links. It never changes a spec or what you pay.

ChainChain pitch 520Stock chain links 114Owner's manual p. 2-7520 chains at MotoSport
SprocketsStock front sprocket 13TStock rear sprocket 49TOwner's manual p. 2-413T front sprockets at MotoSport49T rear sprockets at MotoSport
TiresFront tire 80/100-21 51MRear tire 110/90-19 62MOwner's manual p. 2-5Front tires 80/100-21 at MotoSportRear tires 110/90-19 at MotoSport
Engine oilEngine oil spec SAE 10W-40 (or 10W-50, 15W-40, 20W-40, 20W-50), API SG or higher, JASO MAEngine oil capacity (oil change) 920 ml (31.1 fl oz)Owner's manual p. 2-2Engine oil at MotoSport
CoolantCoolant capacity 940 ml (31.8 fl oz)Owner's manual p. 2-2Coolant at MotoSport
Suspension springsStock fork spring rate 4.7 N/mmStock shock spring rate 54 N/mmOwner's manual p. 10-3Suspension at MotoSport

All six part types · Alpinestars Tech boots and Fox Racing’s own best-seller lists · Every stock size for this bike

Head to head

Side by side, sourced

Every value shows its page. Where a manual does not print it, the box says so.

SpecGasGas EX 300 2027Husqvarna FX 350 2027
Sprockets14 / 48 p. 13114 / 50 p. 153
Front tire80/100-21 51M TT p. 13280/100-21 51M TT p. 154
Rear tire110/100-18 64M TT p. 132110/100-18 64M TT p. 154
Fork travel300 mm p. 131300 mm p. 152
Shock travel300 mm p. 131300 mm p. 152
Seat height957 mm p. 131954 mm p. 153
Weight102.5 kg p. 131105.5 kg p. 153
Coolant0.95 L p. 1300.90 L p. 152

From each maker’s manual, checked 16 Oct 2026. Full comparison with every source · All 729 comparisons

Riding an electric bike?

E-moto law in 50 states, every answer cited to the statute with the date we read it.

How we’re funded

Research first

  • From the manual

    Only a value printed on the maker’s own page counts as verified. Page and date on every one.

  • Blanks never guessed

    If no maker document prints it, the box says so. No averages, no borrowing from a similar bike.

  • No display ads

    Labelled retailer links and sponsors pay the bills, and never touch the data. How we verify · Affiliate disclosure