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Kawasaki

Ninja ZX-4R

The Ninja ZX-4R is the only production 400cc inline-four sportbike available — a 15,500 RPM engine with 77 hp from 399cc, Showa SFF-BP fork, and KRT-style bodywork at $9,099. The high-rev character delivers a unique experience no 400cc twin can match, though the small displacement limits passing power at highway speeds.

CategorySport
Used range$7,000–$9,000
Open recalls0
Best forBeginner
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399cc inline 4
Engine
417 lbs
Weight
31.5 in
Seat
$9,099
MSRP
Used range$7,000–$9,000

Too few clean used examples are moving yet to price this one confidently.

Used price, ownership cost, and rider-fit estimates are editorial. Verify before purchasing.

Rider fit

Best-use signals

Beginner7/10
Commuting6/10
Touring2/10
Off-road0/10
Two-up2/10
Sport7/10

Buying intel

Known strengths

  • Unique 399cc inline-four revs to nearly 16,000 RPM, offering a one-of-a-kind experience
  • Broad electronic suite including KTRC traction control, power modes, and quickshifter (ZX-4RR)
  • Light weight and low seat height make it accessible to a wide range of riders

Buying intel

Common issues

  • Small displacement limits highway passing power compared to 600cc+ competitors
  • Premium pricing for the displacement class may deter value-focused buyers

Buying intel

Inspection checklist

No notes are in the MVP data yet.

Buying intel

Maintenance notes

  • High-strung engine may require more frequent oil changes than larger twins (every 3,000 miles recommended)
  • Valve clearance inspection recommended every 15,000 miles

Years to buy

Best years

No best-year signal has been added yet.

Years to inspect

Watch list

  • 2026
    Watch
    The Ninja ZX-4R is the only production 400cc inline-four sportbike available — a 15,500 RPM engine with 77 hp from 399cc, Showa SFF-BP fork, and KRT-style bodywork at $9,099. The high-rev character delivers a unique experience no 400cc twin can match, though the small displacement limits passing power at highway speeds.

Recall snapshot

0 open campaigns

Last checked May 24, 2026 through MANUAL.

Configuration

2026 ZX-4R

sport motorcycle with 399cc inline 4.