How do to all those who do the drags. I've run up on a slight problem....I can't seem to get second gear to hook at the track. All I've done to my bike since the last visit is lower it. Now second gear 9: the rear. How much air should I run in the back? Had 30lbs, now have 20. I plan on trying that this Friday. Any recommendations on tire pressure? If this doesn't solve it, then what? Maybe positive traction?