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Mini Pipe Calculator Tuned pipe length and inside diameter for a small two-stroke

Enter the exhaust duration, the RPM you want the pipe tuned for, and the bore and stroke. The pipe length (to the piston face and to the bore centre line) and inside diameter appear in red on the silhouette; displacement is listed below.

bore centre line piston face header belly baffle stinger tuned length ends here bore stroke ID L1 to piston face L2 to bore centre line

Swipe sideways to see the whole drawing.

IDPipe inside diameter (in)—
L1Pipe length to piston face (in)—
L2Pipe length to bore C/L (in)—

Press Calculate to show the results on the drawing and in the table below.

All results

Press Calculate to fill this table.

Every value the calculator produces, in the original order. Tinted, bold rows are the key results also shown on the drawing.

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