hello all! im been trying to find a restrictor kit for my SRAD 1999 and for the life of me, cannot find one. So ive come to the conclusion that i will make the washers myself. i found a forum from 07 and someone had put that the washer you need to make is 40mm outer diameter with 13mm inner diameter. Could anyone confirm this?? or tell me the diameter of the inlet mainfold on the SRAD? all the best Hayden!