What can try to fix this? I've tried adjusting compression and rebound on the shock but nothing seemed to help. I'm thinking I need to look at the forks but the front is working well and I don't want to loose that.
Sure? Make sure you check your oil level as well. Insufficient or no air gap will "bottom" the forks too. What bike? What mods? What geometry numbers or fork/shock lengths?
Poor riding technique can cause that too, no matter how good the setup is. Definitely make sure the brake application is smooth.
why? u quoted a guy that knows what hes talking about. thats probably the one thing I wouldn't try now, unless you already know the spring rate is out of range. the shock is hardly compressed during hard braking. so changing spring rate won't affect wheel position under hard braking. changing ride-height or preload will produce larger more noticeable changes.
I should've explained more. I like his idea of taking preload out. The problem is that the collar is already backed all the way up not allowing any more preload to be taken out.
shock spring preload has a usable range. 10-15mm is the rule of thumb. you probably shouldn't go less than 8mm. most adjusters won't let you set <8mm on purpose. so ya, something is definitely out of range if you want to use even less.
Because he's trying to set his bike up using absolutely no numbers (like, literally, none) over the internet and is getting advice that's worth exactly what he's paying for it. In fact, he didn't even say what bike he was racing. (Maybe it's an SV, based on the screen name? Maybe.) So, step one would be what motorcycle? Step two would be literally every other piece of information you need in order to make anything even close to an educated guess as to what's going on with this motorcycle. Step three would obviously be using some kind of farm harvesting device to collect the respect and/or profits from setting a motorcycle completely blind over the internet. (Remember, we have no idea what year, make, or model, let alone spring rate or geometry numbers or any other data point. Literally, no data. None. I used to think the tire picture threads full of suggestions while being completely devoid of information were ridiculous, but I think we just hit a new high score for internet suspension setup expertise.
I thought this thread was going good to. So your telling me that my issue could literally be anything. Instead of more realistically a couple common solutions to the problem. I'm just looking for a couple things to try at the next trackday. If they dont work better I change it back. I'm not racing MotoAmerica.
Mike is right on point here. Asking for help without details prolongs the OP from getting good correct recommendations quickly.
Lifting/floating/r&l floating or Wagging (locking and wagging)? 2 different things. Also, "Not bottoming" the fork doesnt mean you arent running out of usable travel...ie spring rate + oil level, might be 'stopping' the travel early.