I'd have a look at the clutch assembly. Specifically, check the nut that holds the clutch assembly onto the mainshaft. You'll have to take the primary cover off and remove the snap ring from the center of the clutch assembly. The nut is behind the there. It has LEFT HANDED THREADS and torques to 60-80 ft. pounds. If the vibration stops with the clutch pulled in or the tranny in neutral, that's the giveaway. Look for something in that area. It could be the bearing in the inner primary or the bearing inside the final drive gear allowing the clutch assembly to vibrate.
Good Luck
Steve
You know, I've heard of that being a problem with the Twin Cam engines. Until they came out, I'd never heard of a flywheel slipping in the older engines. I do know that on the Twin Cam flywheel, the crank pin is pressed into the flywheel halves rather than "bolted" like the older pins were.
Now, here's the question. Who made the 103" stroker flywheel assembly that you're having installed and what did they do to prevent the same thing from happening to it? I've heard of the same problem with the 103" Screaming Eagle engine as well.
Steve
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when you are taking off and engauging the clutch, do you get the vibration as you are letting the clutch but once it is fully engauged the vibration is normal? what kind of mods have been done on bike? how long have you had this problem? let me know and i will try and help you find problem. Brian D
well i found out my problem i spun one of the fly wheels on the crank having shop fix it , so i allso made dission to upgrade to 103 in motor , here is why cost $2800 just for fly wheels they have to split the case they are going to charge me $3400 for the motor up grade new cams (gear ) no chain should have bike back in week or two
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