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Hi guys, I have purchased a set of GPX Black Label Front forks 660mm. I want to fit them to my bike. It's an older crf50 copy frame (I believe). from my research it looks like the head stem bearings will not fit my frame, I haven't stripped my bike yet to measure O.D's of mine but sounds like...

Hi I have a question regarding the fitment of a high compression piston to an otherwise stock yx140 engine +( oko26 s38 m96 ) (outer rotor kit ooracing) This piston I bought from DHZ ( 56mm 13mm pin). can I fit the piston with no worries or is there anything else I should do? thanks in...

hey i'm running a yx140 with no mods(yet) except for a big bore exhaust i've been looking at a full race ignition kit from ooracing VMR118 is this kit what is meant by an ORK? does anyone have any experience with these, what sort of diffrences will i notice in power and will i loose down low...

Hi i'm knew here, can anyone tell me how i can tell whether my Yx140 engine has the larger valves without pulling the head off and actually measuring them?