i have no clue what it is theres no words or arrows on the crown at all theres no IN like the trx piston its a solid flat top piston it has a slight crown but not as much as a stock one
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86 TRX250R
86 cases with 88 style hot rods crank
fresh seals and main bearings
68mm bore with wiesco 86 style piston
ported cylinder
stock head
.190 spacer plate kit from ESR
boysen reeds
pt elimantor pipe
36mm pj
k&n filter with no airbox
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