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Online store run by Xpert Moto
Local pickup available for pre-orders only
On-site installation at our Lewisham workshop
Online store run by Xpert Moto
Local pickup available for pre-orders only
On-site installation at our Lewisham workshop
Online store run by Xpert Moto
Local pickup available for pre-orders only
On-site installation at our Lewisham workshop
Online store run by Xpert Moto
Local pickup available for pre-orders only
On-site installation at our Lewisham workshop
Call us at: 0433 880 748
Free shipping over $200 (excludes tyres and bulky items)
Need help? book@xpertmotogear.com.au
Explore related collections:
- ➔ Carburetors and tuning (1262 products)
- ➔ Carburetor jet kits (187 products)
The Keihin Main Jet #145 Hex is a factory-specification fuel metering jet designed for use in Keihin carburettors. The hex-head design allows removal and installation with a standard hex socket, making carburetor tuning and jetting work more straightforward than flat-blade alternatives.
Sold in a pack of four, these jets suit riders who are dialling in fuel delivery across a range of throttle and altitude conditions, or who simply want a set of spares on hand. Keihin jets are manufactured to tight tolerances and are a trusted choice for OEM replacement and performance tuning on motorcycles, ATVs, and other powersports applications.
- Keihin OEM-specification main jet for Keihin carburettors
- Size #145 for precise fuel metering at the rated flow
- Hex-head design for socket-tool installation and removal
- Pack of 4 — suited to tuning sessions or keeping spares on hand
- Manufactured to tight tolerances for consistent fuel delivery
- 4 x Keihin Main Jet #145 Hex
| Brand | Keihin |
|---|---|
| Part Type | Main Jet |
| Jet Size | #145 |
| Head Style | Hex |
| Pack Quantity | 4 |
| SKU | 68-100-145 |
- When removing or installing hex jets, use a correctly sized hex socket to avoid rounding the head — do not use pliers or adjustable tools directly on the jet.
- Ensure the carburettor bowl is fully drained and the fuel supply is off before removing any jets.
- Clean the jet orifice with carburettor cleaner spray and allow to air dry; never use wire or drill bits to clear the orifice, as this alters the calibrated opening and ruins the jet.
- Inspect the jet for varnish or sediment build-up during routine carburettor servicing, typically at each service interval or after extended storage.
- When re-installing, tighten snugly by hand first, then with a socket — overtightening can strip the soft brass thread in the carburettor body.
- Store unused jets in a sealed bag or container away from moisture to prevent oxidation of the brass.
- When jetting up or down for altitude, temperature, or airbox/exhaust modifications, change one jet size at a time and test ride to assess the effect before making further changes.
- Dispose of old jets responsibly — brass is recyclable.
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