The front vernier isolastic mount for my 74 Commando can not be adjusted tight enough to fit between the 2 mounting holes on the frame It appears that the front mount is the culprit as I cannot tighten the 2 collars any tighter against the front mounting tube cap. If I remove the 2 washers it will fit so it is about 1/32 of an inch too tight.According to the Norvil spec sheet I have the right vernier 66130 and 66131 to fit the standard motor mounts. The rear fit with no problem! It appears the only solution is to take about 1/32 off of the motor mount but this doesn't make any sense to me. has any one else run into this problem and any suggestions. The frame spec calls for 152.27 mm between the mounting holes mine appears to be about 151 mm which makes the problem worse. Thanks Drummer99