Well I got this idea from a member on the YZ426 board who had the same problem. I've had shims ordered for a month now and the 1.75's are not here yet so I may have to put the old ones in until the right ones get here. If anyone has two 1.75 shims laying around I would be interested in buying them. I went to the trouble of studding up for winter riding up in here in the great white north (Iowa)and if I do not get this thing running soon winter will be over. Thanks for any help on this.