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Ships within 48 hours · Estimated delivery Aug 16 - Aug 21
Remove stock crank and install cy 2mm stroker crank
We take a lot of pride in every engine that ships out of the OBR warehouse and we feel this one really reflects what we are capable of building
and clutch plate bolt - everything necessary for installation
disassemble crank to install +5mm long rod and re-balance combustion chamber cut to accommodate +2mm stroke crank and dome re-cut
6271 - Full Mod 57cc Twin-X Package Remove stock crank and installPlease note there is a lead time on this engine. Please contact us prior to ordering for the current lead time if this is an issue. RECOMMENDED FOR THE ADVANCED USER!!!! The 57cc twin is brand new release and is currently the largest twin we offer. Same bottom end as a 45 or 50. 8cc but with Zenoah 36mm top ends. Being that this is a larger displacement you can expect this twin to be the highest torque but not rev quite as high a 45 or 50. 8cc. Twin
