I believe some work was done and some parts replaced before I got it.


How does that effect the front mount?

 

I have followed this cause it seems to be an Off the Wall situation.
While I'm no expert on these motor mounts, is it possible that the bolts are getting loose and shearing of with the looseness. This crosses my my mind because of dealing with sheared bolts on older GM A/C compressors and P/ steering pumps.

Just a thought WP

 

I used nylocks.

 

The whole power train is one unit on our bikes. Engine, transmission and swingarm. So, motor mount wise, there's the top one, the front one, and the swingarm, if I'm not mistaken that connect the power train to the frame. And, your revelation that someone has been into the swingarm mounts makes that even more suspect. If there's something major out of alignment or the rubber compound is totally off or something, that could put a lot more shear force on the front mount, I would think.

Somewhere up in this thread, I believe it was suggested to replace the motor mounts. If you have already done that, then the swingarm mounts are the only thing left.

 

I pulled the front mount this evening, I believe it's an aftermarket item,( doesn't look like pics of oem that I've seen) and appears like new.


The stabilizer link might be bad, but I'm not sure what a good one is like.
One end the rubber and inner sleeve rotate, and the other end does not.

 

Thanks for the update. Do you know if the bolt under your oil filter is loose?
I have found that if that bolt loosen up then the other one shears. So I check that one often.

 

Under filter bolt snapped, other bolt still tight.

 

Look at what jonjzjz and Dr Hess have posted. I too would suggest that vehicle alignment is a serious concern. Looking for a different, harder bolt is a temporary fix and only masking a more serious issue.

Alignment issues are listed as either rear wheel, horizontal and vertical misalignment. The shop manual describes ways to address all three.

 

Today I did the alignment, which was out a good bit.


I also found the front motor mount plate was not flat where it bolts to the cases, far from flat.
I figured that can't be good so I replaced that with an older cast model which was nice and flat, we'll see if it all helps.


Are those plates typically not flat at the mounting surface?

 

talking about 47159-79A the front engine bracket? the tab that goes from motor mount and motor? It should be flat, pretty bizarre if that was bent, wrecked maybe?