Stock isnt good just period. Its too short of a wheelbase. +2/+3 is ideal for trails. If your interested, im making extended swingarms. Check out my for sale thread "custom swingarms"
the main thing extending the swingarm is gonna do is keep the front tires on the ground, you should have some handling improvement.
You should do it as long as you have the money
i hate keeping my front tires on the ground nothing more exciting than bailing off it as it's tumbling down the hill backwards of course some say i'm a bit of a smartass