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incl. VAT
Available sizes: 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310
Fits all motorcycles equipped with Mikuni VM (VM16-VM44), TM (TM24-TM38), or TMX series carburettors
Note: fitment is determined by carburetor model, not bike model. Verify your carburettor series before ordering.
Need parts for a different brand, model or year?
We stock gear for many bikes. If you don't see your model, reach out and we'll source it for you.
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The ProX 47.XXX main jet controls fuel delivery at high throttle - from approximately three-quarter throttle to wide open. It is the primary jet for tuning top-end fuelling on Mikuni round slide and flat slide carburettors.
Machined from brass to OEM Mikuni tolerances. Dimensions: 11.5mm length, 5.2mm thread outer diameter, 6mm hex (large hex type). Made in Japan. ProX part numbers follow the 47.XXX format, corresponding directly to Mikuni OEM designation 4/042-XXX. Example: ProX 47.200 equals Mikuni 4/042-200.
The 190 to 310 size range covers standard jetting for most 65cc to 250cc two-stroke motocross engines running Mikuni carburettors. If the engine runs lean at full throttle - overheating, flat power, popping on deceleration - go up a size. If it four-strokes or loads up at wide open throttle, go down.
Sold individually.
Available sizes: 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310
Fits all motorcycles equipped with Mikuni VM (VM16-VM44), TM (TM24-TM38), or TMX series carburettors
| Main Jet size | 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310 |
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Orders placed by 10:00 CET on a working day ship the same day, others usually the next working day. Delivery within the EU takes 2-4 working days after dispatch. Outside the EU, checkout shows the delivery time of each DHL service.
Orders shipped to EU destinations qualify for free shipping once the cart subtotal reaches €150. Orders shipped elsewhere are charged carrier rates, calculated automatically at checkout.
You have 30 days from delivery to return any item in original condition. Full policy →
Pro-X Racing Parts makes engine and carburettor parts for motocross. Art of Racing stocks the ProX gasket sets for the KTM 85 SX, Husqvarna TC 85 and GasGas MC 85 (complete set 34.6118, top end set 35.6118, head and base set 36.6118), the 52.61018 air filter for the same bikes, and Mikuni VM main and pilot jets in single sizes.
