New release" after many months of testing we are ready to produce and sell our  2mm stroker crank for the S-520 RCMK bottom end installing this will give you 61cc with 29cc Heads.installing these will take  In-line to level never seen before. when seeing one run is sick its unreal.

IN STOCK READY TO SHIP.

Price is $329.00 you can send payment with note to This email address is being protected from spambots. You need JavaScript enabled to view it. or order through the website