Hello, I just bought a tera 820 with a new 66cc and sbp jackshaft kit. I am going to upgrade it as much as I can afford to so I can use it on forest service roads in northern California where I look for gold. I have really bad rheumatoid arthritis which limits how far I can hike and with gas being over $4.00 a gallon this bike should be great for exploring the hundreds of miles of forest service roads out there. I am pleased to be a member of this group. I have learned a lot in the short time I have been here.