When I bought the asv universial clutchlever which also came with the perch for my 06 450f this is what I had to do .I had to take 3 washers and cut one side of them with a hacksaw in order for them to fit. If you try and to just put the whole washers on there they will not work because they will hit the motor,thats why I had to take a hacksaw and cut about 3mm's off of one side. But the reason for this was to give me more clutch adjustment at the clutch perch. You know!!!! the screw that you turn out at the perch to give you mor lever pull.