Hammerhead Jet, Pilot Jet for Keihin-Style 125cc / 150cc, GY6 / 250cc Carburetors

Keihin-style pilot jet for most 150cc and 250cc carburetors used on scooters and buggies.
As low as $3.99 was $4.99
Availability: In stock
SKU
pilotjet_hhpwd

Frequently bought together

  1. Hammerhead Jet, Pilot Jet for Keihin-Style 125cc / 150cc, GY6 / 250cc Carburetors
  2. +
  3. Hammerhead Jet, Main Jet for Keihin-Style 125cc / 150cc, GY6 / 250cc Carburetors
  4. +
  5. Hammerhead Intake Elbow for 28mm - 32mm Carburetors and 2" UNI Filter
  6. +
  7. Hammerhead Carburetor with Manual Choke, 24mm for GY6, 150cc - 13-1601-00 replaces 15856, 6.000.024, PD24J, PD24J00150G000, 14197, 16100-KAT-913-1, 16100-KAT-913, 14925
  8. +
  9. Hammerhead Carburetor 30mm, Electric Choke for 250cc - 172MM-100000 replaces BR250-464, KB002020000, 1610A-SCC0-0000, GK-19-250-03-32, GK-19-250-03-30, GK-06-250-3-25, DN250-337
  10. +
  11. UNI Filter Foam Filter, Oil & Filter Cleaner Kit - UFM-400
  12. +
  13. Hammerhead Performance Intake / Velocity Stack for 150cc, GY6 - INTAKE-150
  14. +
  15. Hammerhead Jet Kit, 16-Piece Jet Kit for Keihin-Style 125cc / 150cc, GY6 / 250cc Carburetors
  16. +
  17. Hammerhead Carburetor with Automatic Choke, 24mm for 150cc - 6.000.024 replaces PD24J, PD24J00150G000, 14197, 16100-KAT-913-1, 16100-KAT-913, 14925
  18. +
  19. Hammerhead Manual Choke Kit for 150cc, GY6 - 150manualchokekit replaces 15563, 15439
Total price: $0.00

Thumbnail Name Price Options
$3.99
$3.49
$19.99
$89.99
$89.99
$17.99
$44.99
$19.99
Jet - Pilot Jet Size 45   + $0.00
Jet - Pilot Jet Size 42   + $0.00
Jet - Pilot Jet Size 40   + $0.00
Jet - Pilot Jet Size 38   + $0.00
Jet - Pilot Jet Size 35   + $0.00
Jet - Main Jet Size 140   + $0.00
Jet - Main Jet Size 138   + $0.00
Jet - Main Jet Size 135   + $0.00
Jet - Main Jet Size 132   + $0.00
Jet - Main Jet Size 130   + $0.00
Jet - Main Jet Size 128   + $0.00
Jet - Main Jet Size 125   + $0.00
Jet - Main Jet Size 122   + $0.00
Jet - Main Jet Size 120   + $0.00
Jet - Main Jet Size 115   + $0.00
Jet - Main Jet Size 112   + $0.00
$49.99
$44.99
Total Selected Items:
Total price: $0.00

The pilot jet controls the volume of fuel delivery in your carburetor from idle to approximately 1/2 throttle, when the main jet takes over. 

If you've upgraded your carburetor, air intake, or exhaust, you may find you're running leaner when idling. A larger pilot jet can help restore the correct air/fuel ratio at low speeds. 

Most stock carburetors come with a size 35 pilot jet. Pilot jets should be increased in size in single steps: 35 to a 38, 38 to a 40, etc until you reach the correct air/fuel ratio when idling and at full throttle.

Carb tuning tip:
If your carb is backfiring heavy when you let off on the gas after being at wide open throttle, your pilot jet may be too large. If it's lightly popping when revving down, the pilot jet may be too small. 

When properly jetted, your motor should rev smoothly up from idle to wide open, and back down.

If your motor is popping or bogging when you are on the throttle, usually it is an incorrect main jet size, dirty carburetor or incorrectly adjusted valves.

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Price $2.49
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