Hey David ...i'm sure S/S Machine does affordable international world wide shipping 2 or 3 weeks max & deff worth doing. ...The diy dry Ptfe spray coating (rated to 500°f & the lowest known Q of friction self-lubricating material)
is super compatible with rubber on metal sliding applications Without any additional wet lubricant needed. That entirely eliminates the need for
Any fuel-lube mix and/or any direct applied to piston-cylinder wet lubes & lets the pure clean white fuels combust cleanly as possible without "passing" thru wet sooting plug & valves fouling oil based wet lubes. Retain the stock upper O-ring & add your 2nd additional rubber o-ring & piston groove to allow the entire piston to float non-contacting any part of cylinder wall like piston to wall isolators without need to worry about getting any "liquid" lube between the o-rings & eliminates any metal piston skirt frictional scuffing to cylinder wall issues. A non-metallic o-ring at far opposite ends of the fully "floating" piston to speak....just a few thoughts to let the 4 stroke fuel & run like well lubed 4 stroke without the 2 stroke lube mess i plan to impliment on my M90...Regards,...tom.
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