very useful on how to get things tuned up. http://scootrs.com/tech.cfm?tip=tunecarb#e parts source http://www.scootercraft.com/product_...c73051ee099953
http://www.tonyfoale.com/
http://www.cosentinoengineering.com/...s/page0015.htm cool engineering...
http://tzr250.com/Downloads/ great resource especially the head down xls file.
