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Keihin Style 4mm Main Jet - PB PAB CVK Carburetors

#75
$6.00
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Product reference photograph, view 19. Confirm the selected option in the specifications.
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  • Product reference photograph, view 19. Confirm the selected option in the specifications.
  • Keihin Style 4mm Main Jet - PB PAB CVK Carburetors — source gallery view 2 [P067-42886957957400]
  • Keihin Style 4mm Main Jet - PB PAB CVK Carburetors — source gallery view 3 [P067-42886957990168]
  • Keihin Style 4mm Main Jet - PB PAB CVK Carburetors — source gallery view 4 [P067-42886958022936]
Keihin Style 4mm Main Jet - PB PAB CVK Carburetors

Keihin Style 4mm Main Jet - PB PAB CVK Carburetors

$6.00
Part number JETKH1 75

Check dimensions and compatibility before ordering.
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Description

Fine-tune your air-fuel ratio with these high-precision Keihin Small Round 4mm Main Jets. Designed for Keihin PB, PAB, and CVK series carburetors, these are the standard jet for optimizing performance after installing a big-bore kit, exhaust, or high-flow air filter. The M4x0.70 thread and 5mm round head match the Keihin 99101-116 style used across a wide range of 50cc–150cc scooters. Available in 15 sizes from #75 to #130 — select your size from the variant dropdown.

Compatibility note: These are Keihin "Small Round" (99101-116) style jets. Not compatible with Keihin "Large Round" (99101-393) or "Hex" (99101-357) styles. Verify your jet dimensions before ordering.

Jetting tip: Always start with a larger jet than you think you need and work down. Running too lean can cause engine overheating and permanent damage.

Features

  • Keihin Small Round style (99101-116) — M4x0.70 thread, 5mm round head
  • High-grade machined brass for precise fuel metering
  • Available in 15 sizes: #75, #80, #85, #90, #95, #98, #100, #102, #105, #110, #115, #120, #125, #128, #130
  • Fits OEM and aftermarket Keihin PB, PAB, NCV, and CVK carburetors (17–26mm)
  • Not compatible with Large Round (99101-393) or Hex (99101-357) styles

Specifications

Jet size75
  • Jet Style: Keihin Small Round (99101-116)
  • Thread: M4 x 0.70mm (~3.9mm OD measured)
  • Total Length: 7.0mm
  • Head Diameter: 5.0mm
  • Material: Machined brass
  • Available Sizes: #75 through #130 (15 sizes)

Model Fitment

Carburetor / Application Notes
Keihin PB, PAB, NCV, CVK (17–26mm) OEM and aftermarket
Genuine Buddy 50 Stock jet #74
Genuine Buddy 125 / 150 Stock jet #90
Genuine RoughHouse 50
GY6 / 139QMB 50cc & 150cc CVK carbs TaoTao, Wolf, Ice Bear, Bintelli, and others
Select Honda, Yamaha, SYM 4-stroke Models using Keihin CVK units

 

Supplier product-family reference photos. Select the exact weight or jet size from the options; markings in a reference photo may show a different option.

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