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RM100/KX 80/ KX 85/ KX 100 -> 112cc Big Bore Stroker kit
Fits KX 80, KX 85 or KX 100 1998-2007 and RM100 1998 through 2003. The kit includes: +2mm HotRods Stroker Crankshaft. Big Bore (Nikasil plated) cylinder 54.5mm bore. Cylinder head modified for the big bore piston and stroker crank . Powervalves machined for bigger bore. Wiseco Pro-lite 54.5mm piston, rings, pin and clips, top-end bearing and a top-end gasket set. 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 amd longer stroke adds power all through the powerband. The combustion chamber of the head gets polished also.

Total for the kit: $750.00 if you send us your old cylinder and head for the core charge. Or $950.00 and we will refund $200.00 when we get your old cylinder and head for the core charge. If we have the kit in stock we can ship right away if you pay with credit card. We can charge the $750.00 then do a $200.00 "authorization" on your card. The "authorization" does not charge to your card, it just puts a hold on the $200.00 We void the authorization when we get your cylinder and head.