Carburetor Jet Drill Set #80–#56 – 50 Pc, 2 Each of 25 Sizes, Factory Resharpened Carbide D7

Carburetor Jet Drill Set – 50 Piece #80–#56

This 50-piece factory resharpened solid carbide numbered drill set includes 2 drills each of 25 sizes, #80 through #56. It is intended for careful carburetor jet tuning, checking, and resizing work on brass carburetor jets and other precision fuel-metering parts.

Useful for motorcycle carburetors, kart engines, small engines, scooters, radio-controlled engine carburetors, and custom jet tuning where small, controlled size changes are needed.

Included Sizes – 50 Pieces Total

Includes 2 pieces each of 25 numbered drill sizes:

• #80 (.0135")
• #79 (.0145")
• #78 (.0160")
• #77 (.0180")
• #76 (.0200")
• #75 (.0210")
• #74 (.0225")
• #73 (.0240")
• #72 (.0250")
• #71 (.0260")
• #70 (.0280")
• #69 (.0292")
• #68 (.0310")
• #67 (.0320")
• #66 (.0330")
• #65 (.0350")
• #64 (.0360")
• #63 (.0370")
• #62 (.0380")
• #61 (.0390")
• #60 (.0400")
• #59 (.0410")
• #58 (.0420")
• #57 (.0430")
• #56 (.0465")

Specifications

• 50 pieces total
• 25 numbered sizes: #80 through #56
• 2 drills per size
• Factory resharpened solid carbide drills
• Standard 1/8" shank, also known as 3.175 mm
• 1.50" overall length
• Packaged in an indexed plastic storage case
• Reference image shows drill style and dimensions only; actual included sizes are listed above.

Common Uses

• Brass carburetor jet resizing
• Main jet and pilot jet tuning
• Small engine carburetor work
• Motorcycle, scooter, kart, and RC engine carb tuning
• Checking, matching, or stepping up numbered drill sizes

Factory Resharpened Solid Carbide Value

These are factory resharpened solid carbide drills, offering performance comparable to new drills at a lower cost. They are professional-grade micro drills with standard 1/8" shanks, intended for stable, accurate drilling setups where rigidity and precision matter.

Unlike lightweight hobby-style wire drill assortments, these are solid carbide micro drills with full 1/8" shanks and are packaged in an indexed storage case for organized size selection.

Use note: Solid carbide drills are precision tools that require a stable setup. For best results, use a pin vise, drill press, milling machine, micro drill fixture, or other controlled holder that keeps the jet square to the drill. Avoid handheld electric drills, side pressure, bending, or forcing the drill.

Important Jet Tuning Note

Drilling a carburetor jet is a permanent modification. Increase size gradually and do not skip too far at once. For the most exact fuel-flow work, remember that jet flow can depend on more than the hole diameter alone, including the entry shape, exit shape, and finish of the jet.

Frequently Asked Questions

Are these new drills?
No. These are factory resharpened solid carbide drills, offering performance comparable to new drills at a lower cost.

Are these for enlarging brass carburetor jets?
Yes. These drills are commonly used for careful resizing of brass carburetor jets in motorcycles, karts, small engines, scooters, and RC engines.

How many drills are included?
This set includes 50 drills total: 2 pieces each of 25 numbered sizes from #80 through #56.

Are these numbered drill sizes?
Yes. This set includes numbered drill sizes #80 through #56, from .0135" through .0465".

Are these solid carbide or carbide tipped?
These are solid carbide micro drills, not carbide-tipped drills.

Can I use these by hand?
They can be used carefully in a pin vise or other controlled holder, but carbide drills are brittle. Keep the drill straight, use light pressure, and avoid side loading.