papz aabot yan ng 150kmh nd nka bigbore kna mn dpat mg adjust ka dn ng sprocket 2 attain highspeed.. ung sa akin stock bore nd stock gearings umaabot ako ng 130 kaso ng float na valve ng motor ko.... paps try 2 c ung sunog ng sparkplug mo that 2 tell u kng rich or lean ung carb mu.......