I have put husqavarna disc front and yz rear wheel.
We had this seasons last classic motocross cup last weekend, it went great, thou I was in pre 87 class.
Last lap it blew return oil hose, luckily it has Marks winning answer with lots of oil in it. Engine I have not done anything exept get carb overhauled.
next I will put Husky twin leading drum on it.
also Im going to Vinduro it next month