I am new to the stand-up world. I aquired an 89 650SX and am doing a rebuild b/c it needed a little work. I am considering the block off kit but have a couple questions. If I use the block off kit is the oil mix 40:1? What type of oil do I use in the crank case 10/30w? Where can I get my hands on an inexpensive block off kit? Thanks for any help.