Check your engine mount nuts and bolts...

[akrievins]

I cleaned my powervalves two weekends ago and was looking around under the hood and saw that one of the engine mount nuts had almost worked itself off of the bolt! Tightened them all up, but was shocked that it had come so loose.

 

[rx1jim]

You should check the engine alignment. Proper clutch center to center and offset distances are critical for proper drivetrain operation.

 

[mrviper700]

blue loctite is your friend, use it.

 

[bluemonster1]

years ago noticed 1 bolt broke on the engine mount and another unscrewed itself.Luckily I got the broken threaded end out of the case,it spun out easy.Locktite it for sure..

 

[Exciter89]

mine was the same way. one bolt was broke, the other was still tight. The broken one was about an 1/8 into the case where it broke. I welded a washer to it, then a large nut to the washer and it turned out easy. Didn't even attempt to drill it. I'm installing a torque limiter so hopefully it will be the end of it.

 

[Yamasquaw]

I had the same thing happen. Used my angle drill with a stubby 1/8" drill bit and easy out and just had enough room to get it out.