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BIHR offers this carburettor jet. A carburettor mixes the air drawn in by the engine with the right amount of fuel, and it is the jets that meter that fuel.
The benefits:
A jet blocked by fuel deposits or dirt, or with its orifice enlarged by cleaning it with wire: the engine is hard to start, idles unevenly or stutters at full throttle.
Cross-Mania tip: Start from the stock size, change one step at a time and check the spark plug colour and how the engine responds after each test; screw the jet in without forcing it, as its thread is fine.
Universal part: check the dimensions given before ordering.
Which box? Each box holds 10 jets of different sizes within the range shown. Take the one that includes the size stamped on your original jet: you can then try the sizes above and below to fine-tune.
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