LEGO 8256 Super Kart Set Parts Inventory and Instructions - LEGO Reference Guide
Interesting (to me, at least) find in the instructions for 42115, page 244, step 367. In my book (left) there's a black pin snuck in, that shouldn't be there. It has been
Peeron: Go-Kart (#8256-1)
Amazon.com: LEGO Technic Go Kart (8256) : Toys & Games