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Hot Cams Stage 1 Intake Camshaft for Yamaha WR 400 F 1998-2000 4002-1IN

Part Number: YZ426S1AI
HOT CAMS
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SKU:
YZ426S1AI
MPN:
4002-1IN
Condition:
New
Availability:
Ships Same Business Day
Weight:
1.00 LBS
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$294.95
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Description

If you're running a WR 400 F and want genuine low-end grunt without compromising reliability, the Hot Cams Stage 1 intake camshaft is the straightforward upgrade that delivers. This is a bolt-on cam that works with your stock valve springs, meaning you get measurable torque gains across the RPM band without the headache of spring replacement or custom fabrication. Built for the demands of trail riding and amateur racing, it's engineered to hold up under sustained abuse.

The Stage 1 profile prioritizes mid-range and low-end power—exactly where you need it for acceleration out of corners and technical terrain. Hot Cams' Improved Throttle Response (ITR) technology sharpens your throttle feel, giving you more precise control over power delivery when it matters most.

  • Fits: Yamaha WR 400 F (1998–2000)
  • MPN: 4002-1IN
  • Type: Intake camshaft, Stage 1
  • Profile: Low-end torque optimized
  • Compatible: Stock valve springs
  • Installation: Drop-in bolt-on
  • Technology: Hot Cams ITR
  • Material: Hardened steel
  • Performance: Mid-range/low-end gains
  • Condition: New, OEM quality
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Specs

PRODUCT NAME:
CAMSHAFT
INTAKE LIFT METRIC:
8.80 MM
INTAKE DURATION IMPERIAL:
260°
APPLICATION:
INTAKE
RIDING STYLE:
OFF-ROAD
UNITS:
EACH
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Fitment

Fitment for Hot Cams Stage 1 Intake Camshaft for Yamaha WR 400 F 1998-2000 4002-1IN

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