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KX65/RM65 - 85cc Ported Big Bore kit
Fits KX/RM65 2000 and newer. The kit includes: 85cc big bore (Nikasil plated) cylinder 51.00 mm bore. Cylinder head gets CNC Machined for the big bore piston and then polished. "" Custom Wiseco piston kit 51mm piston, rings, pin and clips, top-end bearing and a top-end gasket set. This is a complete top-end. The exhaust port has been enlarged and polished, the transfer ports have had the rough casting flaws removed and finished with a glass beaded finish. The glass beaded finish helps prevent fuel/air separation but also allows good air flow. Removing casting flaws and polishing the exhaust port will gain significant power in midrange and top-end without loosing any low end power. The bigger bore adds power all through the powerband. The Nikasil plating on our re-plated cylinders is a minimum of .004" thick as compared to the stock thickness of .001"-.002"

Total for the kit: $900.00 We will refund $300.00 if you send us your old cylinder and head for the core charge or $600.00 on your cylinder.

Replacement Piston kit is $125 if you purchase the big bore. Retail $150