Many owners of Yamaha Virago bikes, especially older models, have encountered this problem. href=mylink.href; This manual has detailed illustrations as well as step by step written instructions with the necessary diagrams or [] I only have stage one, beyond that, engine bogs down and gas sprays out the back of carb. Bro this is awesome thank you for compiling this info. have to work together properly to get the scooter to hot and cold start. runs about 65mph. Any suggestions? Fine tuning will begin tomorrow along with pictures.