Cylinder on Ebay advertised as "70's RT1360. Has got to be RT2MX looking at the squarer fining & especially the fining around the exhaust port area. Probably need to be bored to 81mm but lots of choices for piston kits i'd think, like DT360A or MX360 or probably any model reed 360 piston kit & if ya stuck i have an 82mm YZ400F 2X5 1979 kit in my cylinder. Could do with a spare cylinder but freight kills the enthusiasm these days.
Besides--got no room in the shed as bought an importers stock of redundant chinese scooter parts which i doubt i'll have much luck selling in big quantities. Not sure what i was thinking haha. Hope the ebay link works but just incase it's 352686646206.

eBay item number:
352686646206
So what i was getting at--was--here it is if anyone wants to--Go Fast their 360 RT1--2 or--3. Need the head too--to get the compression up & get the advantage.