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#20711

andy graham
Participant

can someone post the RMax rule that requires the newer style (`09+) cylinders…all I can find with regard to “legal” cylinders in the rules speaks to casting #s, cant find anything that addresses year of production….maybe it was an update that I can’t find.  Here’s what I did find in the RMC Rules 2013 Bulletin 1….

“9.1.5) Cylinder:
a) Light-alloy-cylinder with GILNISIL-plating. Any re-plating of cylinder is not allowed.
b) Cylinder with one main exhaust port.
c) Maximum bore of cylinder = 54,035 mm (measured 10 mm above the exhaust port).
d) Cylinder has to be marked with the “ROTAX” logo (see pictures below).
e) 125 Junior MAX: Cylinder without pneumatic timed exhaust valve. Cylinder has to be marked either with identification code 223 999, 223 998 or 223 994

f) 125 MAX: Cylinder with pneumatic timed exhaust valve. Cylinder has to be marked either identification code 223 997, 223 996 or 223 993

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