The HX-12A has been developed to further improve the performance of the Rotax engines. The larger 30mm venturi model has become extremely popular in Rotax Open categories where the performance is much improved over the stock carburetor.
Venturi: 30 mm
Throttle Bore: 34 mm
Fully adjustable High and Low jet, on track or off-track
Butterfly Opening
Racing Class Venturi / Body Design
Racing Class Inlet Needle and Seat Design
Pulse Pump Connection
Suitable for open racing where rules permit use of any carburettor. Not permitted in Rotax World, Rotax Max Challenge and other unmodified Rotax-sponsored racing. Check your local rules for permissions.
Recommended Initial Settings:
Rotax MAX (Senior/Masters):
L: 1’00”
H: 1’20” – 1’25”
Rotax MAX (Junior):
L: 1’00”
H: 1’15” – 1’20”
Mini MAX:
L: 1’00”
H: 1’10” – 1’15”
Mini MAX:
L: 1’00”
H: 0’50” – 1’00”
DD2:
L: 1’00”
H: 1’30” – 1’35”
Setup Guidelines:
1) Mount the carburettor to engine
2) Connect pulse line to carburettor from crankcase (no need for Mikuni pulse pump)
3) Set the carburettor jets to desired setting. We recommend to use the QuickJet tool for accurate setting. See above recommended settings and adjustment technique.
4) Draw the fuel to the carburettor
5) Cover the air filter trumpets by hand and turn over engine until it fires / or remove air filter and cover choke the carburettor inlet by hand and start engine
6) Go Racing!!
Repair Kit and Diaphragm Gasket for this carburetor:
Main: RK2-HW and DG2-HW
Optional: RK1-HW and DG1-HW
