Right, When i looked behind the speedo and tried to fit the converter!
it is one of these!
http://cgi.ebay.co.uk/SPEEDO-CONVERTER-DELIMITER-MAZDA-BONGO-RX7-CHIP_W0QQitemZ370016657949QQihZ024QQcategoryZ52640 QQssPageNameZWDVWQQrdZ1QQcmdZViewItem (http://cgi.ebay.co.uk/SPEEDO-CONVERTER-DELIMITER-MAZDA-BONGO-RX7-CHIP_W0QQitemZ370016657949QQihZ024QQcategoryZ52640QQssPageNameZWDVWQQrdZ1QQcmdZViewItem)
but it tels me to connect the converter to the yelow/red wire on pin no2 bu the thing is the 12 pin connection dont have a yelow/red wire on pin no2! The rev counter how ever dose! so im not sure if i have to connect it to the rev counter rather than the speedo!
Any help please!
James