My old top end up for grabs.... Passion Racing 12 port cylinders, custom pump gas 22-23cc domes, and Wiseco stroker pistons 64.50mm. Top end has low hours kicked 145psi in both cylinders...runs great and pulls hard!!! Everything is in good shape I would potentially change the rings on the pistons and new hone for good measure but this top end has many hours left in it with proper care. Can still see the cross hatching in the cylinder no scars or anything. Porting is very clean as well as the welding for the boysen ports. I was running these with pwk 28's taken to 30mm 160 main 48-50 pilot and some older inframe pipe. I had the bike up to the mountains a few times trail riding and hillclimbing. Looking for $600 shipped in the lower 48