I have recently started my duner project and would like to share with you guys. I am using a 87 frame and for a motor I am going with a psi 425 using a yz490 rod with a kx500 piston should be around the 465cc mark. I will be using the psi carb for now, haven't herd good reviews for the carb but I got the motor running last fall and seemed to run great, so I am going to give it a try if it doesn't work out will be switching to something else. I am going to try running The led puma inframe exhaust. I am very exited about the build. Will be keeping it updated with pics!