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Racing Big Bore Kits
1991-1997 KX80 and KX100 - 107cc Big Bore kit
Fits KX 80 / KX 100 1991 through 1997. The kit includes: 107cc big bore (Nikasil plated) cylinder 54.50 mm bore. Cylinder head modified for the big bore piston. Wiseco Pro-lite 54.50mm piston, rings, pin and clips, top-end bearing and a top-end gasket set. This is a complete top-end. The exhaust port gets enlarged and polished, the transfer ports get the rough casting flaws removed and finished with a glass beaded finish. 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 combustion chamber of the head gets polished also.
Total for the kit: $700.00 We will refund $150.00 if you send us your old cylinder and head for the core charge. $550.00 on your cylinder. The Nikasil plating on our re-plated cylinders is a minimum of .004" thick as compared to the stock thickness of .001"-.002"