Another reason you may be slidding is locking up the front to fast while your suspension is set full or half stiff. You need the nose of the bike to dive then when you feel the suspension is fully compressed then you can lock up and get your ass raised off the seat a bit and lean forward. If your suspension is set stiff the bike will not dip it will be level and shocks will work against you. I must agree a cold road and tires don't help the situation. I do wheelies as well as you do so sorry I have no suggestions. Also set your front brake lever as close to bars as possible allows for two finger "endos". Peace