Mikuni Large Round Main Jets #102.5 - 4 Pack for Harley & Indian V-Twin
About Mikuni
Mikuni has supplied carburetors and fuel-system components to the motorcycle industry for decades, and its HSR series remains a common choice for carbureted Evolution and Twin Cam V-twins where a clean, tunable fuel curve matters more than electronics.
Genuine Mikuni large round main jets in size #102.5 are critical for precise carburetor tuning on your V-twin. This 4-pack provides the necessary components to achieve an optimized fuel mixture for your Harley-Davidson or Indian Motorcycle.
Why riders pick this
- Genuine Mikuni OEM part for reliable performance
- Precise #102.5 main jet size for richer mixture
- Designed for large round Mikuni carburetors
- 4-pack provides tuning flexibility and spares
These Mikuni large round main jets are designed to meter fuel flow accurately through your carburetor's main circuit. The #102.5 jet size offers a richer fuel mixture compared to smaller jets, which can be beneficial when compensating for performance modifications, changes in elevation, or seasonal temperature shifts. With a convenient 4-pack, you'll have the flexibility to tune your carburetor and keep spares on hand.
Enhanced Fuel Mixture for V-Twin Performance
- Genuine Mikuni OEM part ensures factory quality and fit
- Precise #102.5 main jet size for richer fuel tuning
- Designed for large round Mikuni carburetors
- 4-pack quantity for tuning and replacement needs
Achieve Your Carburetor's Full Potential
Whether you're fine-tuning an existing setup or completing a rebuild, the correct main jet is crucial for your V-twin's performance. Moving to a #102.5 jet can help resolve lean conditions and unlock more power, especially after installing an aftermarket air cleaner or exhaust. Always consult your specific carburetor's tuning guide to confirm the ideal jet size for your Harley-Davidson or Indian Motorcycle application.
Specifications
- Brand: Mikuni
- Manufacturer Part #: FN100604-102.5
- Quantity: 4 per pack
- Length: 4.4 in
- Width: 2.2 in
- Height: 0.6 in
- Weight: 0.05 lbs
- Country of Origin: Japan
Common questions
What size jet is this?
This is a #102.5 main jet — one size larger than the common #100 jet for a slightly richer fuel mixture.
How many jets come in a pack?
Four jets per pack — enough for a pair of carburetors with spares, or for multiple tuning adjustments on a single carb.
Will this fit my Harley with a Mikuni carburetor?
Yes, if your bike uses a large round Mikuni carb. Check your current jet size — going from #100 to #102.5 richens the fuel curve.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Mikuni |
| TYPE | Jets |
| SKU | 134-71025 |
| WEIGHT | 0.05 lb |
