Hi so I got a yd 100 clone from bicycle motor works and i have had this issue where the damn thing wont engage. it worked fine for a time but now ive had to replace the clutch arm because it rounded out in the clutch housing. so ive been told I may need to adjust the pre load on my bike? any idea as to which direction I need to turn to get the arm to go away from the engine? any help would be great!