| Author | Message | ||
     Rob_c |
the rear engine mount failed which resulted in the bike weaving down the road for 100 metres then exiting left. I sent photos of the mount to 2 fatigue experts, one said it was fatigue the othe said no. so much for experts.  | ||
| Ericz |
If those bolt holes are worn out-of-round like they look, it would mean the bolts between the mount and the case were loose which would have caused this failure! | ||
| Jpgrego |
Do you have any close up photos of the cracked surface? I don't pretend to be a fatigue expert by any stretch but I'd like to have a closer look at how these things do fail. My first guess would be that maybe 2 of them did fatigue and when they let go the others just snapped. | ||
| Redfive |
Saw another thread on this a couple of weeks ago. I'm starting to get a little un-easy about the rear mounts failing. Is this a common thing now. I remember reading the thread that Erik was even watching the guys fix the rear mount on a XB at a show. Did he say anything like, oops not that again? Wouldnt mind so much, but the people who it has happend to have either crashed or layed it down when the motor hits the front wheel. HAY FROGGY is there an upgraded mount for the XB or just this Aluminum cast crap? I think we need some good old American steel. I have a 07 XB12ss and I wonder now everytime I get on if the motor mount is going to hold. I check it everyweek now. May do it everyday if these threads get more frequent. Redfive | ||
| Froggy |
Started by the same guy...
It wasn't a show, it was March Badness.
No upgrade that I am aware of. It isn't needed. To the best of my knowledge, there has been only 3 failures. Be sure to check your pistons next ride, I know more people that have ruined them than rear mounts. The beauty of the internet is that it makes things look worse than they are. If you want proof, head over to the 1125R section, people bitching about leaky clutch covers, burnt out turn signals and so on. You would think the bike would explode on you. Yet somehow, even with two 1125's in my garage, I am yet to have anything happen other than a tail light burn out. | ||
| Livers |
 We really need an emoticon that doesn't indicate any stupidity on the part of the prior poster. 3 renowned failures, with 1 admission of a prior accident. How about some full disclosure here, Rob? | ||
| Redfive |
OK, thanks for the reality check. Thats what I needed to hear. Just dont like the thought of going down the road at 80mph and my motor falling out. Wasnt a big deal in my 68 chevy, but I had four wheels there. As for the Emoticon, I'll pass. I'm blond and blue eyed. Id have to dye my hair and everything, and I"m not wearing those damn skinny pants that hang past your hips. Wont look good on my XB. Then again I might be able to pull that look off???????? Never mind Thanks guys, Redfive | ||
| Rob_c |
This is the same mount that I started on in December I was just passing on the experts opinions. Ericz sorry the holes are not worn it is just the angle of the photo. all cap screws where tight when removed, in fact it took quite a bit of effort to budge them. | ||
| Rob_c |
Sorry to confuse people. At this point in time I know of 2 similar failures and crashes, ours and kilroy 134's plus one or two mounts found cracked when doing engine work,There have been some second hand reports of similar problems but I have not been able to confirm these, possibly only rumors. | ||
| Rob_c |
Sorry to confuse people. At this point in time I know of 2 similar failures and crashes, ours and kilroy 134's plus one or two mounts found cracked when doing engine work,There have been some second hand reports of similar problems but I have not been able to confirm these, possibly only rumors. | ||
| Rob_c |
Thanks to Sharky and Killroy we now have a better picture of rear engine mount failures.Our failure and the two above failures all had some form of pre-failure impact a year or more prior to the failure. Two where prior crashes and one was a direct impact to the muffler jack point.So it appears that if you have crashed the bike or the engine has had some form of impact, you should replace the mount, I would also keep an eye on high mileage bikes. I have no evidence of failure of the rear engine mount when there has been no extra stress aplied to the mount. |
