Inspect welds for hairline cracks or deep paint creases, which signal a major crash.
Scan for weeping around fork seals, the rear shock shaft, and engine case gaskets. Key Tips for Buying a Used Dirt Bike Checklist buying a used dirt bike checklist
Pull the cover; if the filter is filthy, the owner likely neglected critical maintenance. Inspect welds for hairline cracks or deep paint
Before starting the engine, check the bike's physical condition and signs of maintenance: the rear shock shaft
Look for "hooked" or missing sprocket teeth and a rusty or seized chain.
Wiggle wheels, swingarm, and head stem; any play or "clicking" indicates worn bearings.
Check for "milky" oil (water contamination) and ensure the coolant is full and clean.