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just my luck.
well, i'm not quite for sure how this happened...
the other day when i got home from work, i was pulling the bike in through the front door, and it died. i didn't think much about it, until about 30 minutes later when i was going to leave to see my dad. the bike wouldn't start... the starter was going, but not turning the engine over...
SOOO.... after further investigation, here is what i found..
the crank shaft splines stripped off....
i'm now at a loss here, i'm not quite sure exactly what options i have....
i need help.
just my luck.
How tight was the nut on removal?
it was almost finger tight. so... loose.
Wow - interesting break. How many miles do you have on your bike - just for reference?
Bummer...:(
If the bolt that holds the primary drive gear to the output shaft was loose i could see this happening.It also looks to me that it could of been done over time and engine braking. sorry man it looks expensive. what is the milage on your bike and have you ever had your output drive gear off?
That was the cause, then. You need a crank repair or replacement.it was almost finger tight. so... loose.
I had a similar issue with my X1. The nut backed off and the engine started to make a mild knocking noise. I rode the bike home and took it apart and found the nut loose. It put some wear marks on the splines but nothing like yours. I replaced the nut with a new nut and backed off again within 50 miles. I tired another new nut with Loctite 620, stud and bearing mount, on the nut and it backed off within 50 miles. Finally I used Loctite 620 on the splines of the crank and the nut. That was about 5000 miles ago. So if the wear is not real bad it will work. From the looks of your pics I doubt it will work on your application but I would try it before replacing the crank. I think they stopped making Loctite 620 but I am not sure. I think i saw a similar product called 630. Check with someone that can research Loctite products. What you are looking for is a product that is designed to repair damaged or worn shafts and bearing mounts. If you needing else about this please let me know, I understand what you are going through.
Dwight
Nashville IL
Did something change with the newer motors cause mine is a bolt my bike is a 2010 this is giving me the creeps! I changed my output drive sprocket to a xb9. I used a new bolt w/red locktite torqued to 150 foot lbs.
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