You should read this Should set as an example
http://www.nsr250.net/forums/viewtopic.php?t=180
http://www.nsr250.net/forums/viewtopic.php?t=704
If you have the money theres one for sale in Barf forum 95 SP doohan scheme for 10k and another mc28 for 7.5. I rather get this one and pay $500 shipping atleast this one is already here in USA
$10k
$7.5k