My setup, 2001 Laeger CR500 frame, 1996 OE CR250 carb boot and reed cage (Sparks setup) sometimes run the V Force 3 CR250 cage, 38 PWK AS, 86 250R airboot, 89 250R airbox. I have to slightly pull my airbox forward 3/16 to 1/4. I run no reed spacer and have plenty of clearance plus the 1996 CR carb boot has the best angle on it of all the CR boots (every year CR is slightly different) also my 86 250R airboot is new old stock.