Drive Pulley Failure

[bohussound]

Hi Guys,
I need some help and advice regarding my Pitbull 2008. I was out driving the bike today when at once the bike would not drive forward. So I stopped and looked on the drive pulley and it was hanging loose from the rear wheel. When I looked closer I could see that the pulley screws had all snapped off so they are actually broken. Half of the screws are still on the inside of the rear hub. So now I need to take out the rear wheel and remove the part of the scews that´s still inside the hub and then put new screws in again and hopefully the drive pulley will stay there. I really don´t understand how this can happen and I would appreciate if anyone can come up with ideas about this and also if you can give me some good advice on the procedure of putting this all back together. Is there anything I must be aware of or careful about?
Thanks guys I´m so glad that this forum exists and all the help everyone gets here.

 

[RoadRider]

I gotta ask . Didn't you feel a lot of vibration or something very odd last time you rode the bike? As to how , the bolts probably were not loctited in , backed out and snapped off when you hit the throttle hard.

 

[bohussound]

I gotta ask . Didn't you feel a lot of vibration or something very odd last time you rode the bike? As to how , the bolts probably were not loctited in , backed out and snapped off when you hit the throttle hard.

Yes I felt some vibration but I just got the bike and it was the second time I rode it so I´m not familiar with it yet. But my first thoughts were that the screws probably weren´t loctite and vibrations got them loose and that´s how they snapped off. But is it just that easy to get them out and put new screws in and loctite them and that´s it?

 

[RoadRider]

Drill the face of the broken bolt and use an easy out to remove the broken part. Use a big enough easy out that it will have some strength but not so large that you might hit the threads. If you don't have an easy out , take one of the bolts with you so they can get you an appropriate sized one. If you have trouble getting the broken part out ,use a heat gun to heat the area up. I don't know if those bolts are hardened or not. My thought would be they are a grade 8 but I am not sure.

 

[bohussound]

Drill the face of the broken bolt and use an easy out to remove the broken part. Use a big enough easy out that it will have some strength but not so large that you might hit the threads. If you don't have an easy out , take one of the bolts with you so they can get you an appropriate sized one. If you have trouble getting the broken part out ,use a heat gun to heat the area up. I don't know if those bolts are hardened or not. My thought would be they are a grade 8 but I am not sure.

Ok thanks. I have an easy out so I will try it. Does it matter which loctite I use for the bolts? In the manual it says they should be tighten to a final torque at 60 ft*lbs, is that important or can I just tighten them by hand?
Thanks a lot.

 

[RoadRider]

I would torque them to factory spec. so as to not strip the wheel. I would probably use blue loctite. Red would work but you would have to heat them up to get the bolts back off. Did the manual suggest which one to use , if so use what they recommend.

 

[Five Five]

Recommend a left hand drill you may get lucky and it will spin out the broken bolt. Works for me done my share of easy out extractions