Strongthium Carburetor Jet Kit 48pc – Main & Pilot Jets for Mikuni-style 2- and 4-Stroke Tuners

Strongthium 48-piece carburetor jet kit supplies a broad range of main and pilot slow jets to tune Mikuni-style and many other 2- and 4-stroke carburetors for street, ATV and offroad use.

This kit brings a carefully selected set of jets to riders, mechanics and tuners who need precise fuel metering options without hunting down individual parts. The 48 jets cover large round and hex main jets, multiple pilot jet options for VM and TM/other series, and compatibility notes for a wide range of Mikuni models and common needle jet families. Everything is arranged to simplify rejetting after modifications — like pipe, airbox, or altitude changes — or to replace worn, corroded or missing jets quickly.

Which carburetors and vehicles will these jets fit?

The set is designed around Mikuni families but also suits many aftermarket and OEM carburetor configurations used on motorcycles, ATVs and offroad machines. Fit depends on jet type (round or hex) and the carb model; the listing includes the most common models supported.

• Compatible Mikuni TM series: TM24, TM32, TM34, TM35, TM36, TM38, TMX models.
• VM round and smoothbore types including VM16, VM29, VM33 variants.
• Flat-slide families: HS40 (with accelerator pump), HSR42/45/48 and RS34–RS40 racks.
• Cross-compatible with many Suzuki, Kawasaki, Yamaha, Honda and Polaris carburetors using those Mikuni types.

How many and what sizes of jets are included?

The kit contains 48 jets split across large main jets and pilot/slow jets in multiple size progressions, so you can fine-tune fuel delivery at different throttle positions. Both round and hex-style mains are covered as well as pilot jets for VM and TM-style float carbs.

• Large round main jets: 90, 100, 110, 120, 125, 130, 135, 140, 145, 150, 155, 160, 165, 170, 175, 180, 190.
• Large hex main jets: 130, 140, 150, 160, 170, 180, 200, 220, 240, 260, 280.
• VM pilot jets: 25, 30, 35, 40, 45, 50, 55, 60; TM pilot jets: 17.5, 20, 25, 30, 35, 40.
• Needle jet compatibility includes series such as 171, 188, 196 (with large round mains) and 568, 640, 723 for other configurations.

When should I use these jets — what tuning situations are they best for?

Use the kit whenever you need to richen or lean the air/fuel mixture due to hardware changes, altitude shifts, or engine modifications. The variety lets you step through incremental changes without ordering multiple individual jets and helps isolate the correct size through controlled testing.

• After installing an aftermarket exhaust, high-flow air filter, or performance camshaft.
• When riding in higher or lower altitudes that affect air density and mixture needs.
• To replace damaged, corroded, or missing jets during maintenance or rebuilds.
• For progressive tuning when dialing midrange and top-end power or throttle response.

Who is this for: Tuners, home mechanics and riders who service multiple bikes or frequently swap intake/exhaust components will find the Strongthium 48-piece jet kit especially useful. It’s also a practical shop stock item for performance garages and race teams needing quick access to a broad range of main and pilot slow jets compatible with Mikuni-style carburetors and many popular street, ATV and offroad models.