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mon-thurs 9-5 cst
This jet is for the Ruixing clone carburetors. Not guaranteed to fit other clone carburetors. If you are using the Tillotson PK clone carburetors, they will use a different main jet.
For Most Engines Running Gas Main Jets range from .034-.038
If you are tuning your carburetor and it starts to break-up and crackle, itÐ²Ð‚â„¢s lean; add the main jet. Or if it goes flat on the top-end, this could be lean, and/or your cam can no longer make power at the rpm you are tuning.
If the engine hits a wall on the top end, acting like you hit the kit switch and bogs its rich go down on the main jet.
There can also be other reasons for carburetor tuning problems from ignition coils failing, coil gap being set incorrectly, or fuel system problems such as fuel tank not venting or fuel pump failing or not efficient enough to race engines. Before you start tuning, make sure you donÐ²Ð‚â„¢t have another issue.