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#1
06-25-2015, 08:49 PM
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1450 Still Vibrates Like Crazy
 I Just got done with a major job on my 1450. I changed the ISO mounts, Changed over to a cast iron oil pan, did the welded cross bar mod to the cradle, and installed new flex couplers. Every bolt was replaced with Grade 8 and I used new washers, lock washers, and Loctite thread adhesive. I torqued the pan and cradle mounting bolts to 35 foot-pounds (tight). Tightened the ISO mounting bolts till 2-3 threads stuck out. These are the ones I used; got them at CCSpecialties. ISO Mounts.jpg While I was at it I changed the oil, sparkplug, checked the points, rebuilt the carb, spray lubed all of the linkages, and changed the differential oil and filter. Started up like a dream! Roars at full open throttle and idles down to about 800 rpms without stalling. But the vibration seems worse than before the changes. My mounts were nearly disintegrated and my cradle was sitting on the frame when I changed them out so it was pretty bad before. But now it seems worse. and there's one throttle position where I'm hitting a resonant frequency or something and at that point it feels like its going to shack itself apart. What should I do? 
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