- Joined
- Feb 7, 2009
- Messages
- 12,531
- Reaction score
- 1,176
- Points
- 113
- Location
- Cape Coral, Florida, USA
The bike has covered 35k and is a 2005 model.
The studs were in a good condition but i don't know if it was over tightened by the previous owners.
I did exactly as the manual said for tightening.... criss cross pattern and i also did it in stages.
They got to 90nm and then while trying to get to 100nm they failed.
I've done the new ones up to 70nm.
Tks for the update and claification.
Can you neasure the EXACT mm size of the old stud (where its NOT damaged, the threaded part). Its likely 14mm or 12mm. If you still have the old part. I tried measuring mine with the sprocket on, not enough room.. That would help pin down an acceptable torque value with some scientific method.. Thanks..
Note:
A 14mm bolt, per the Yamaha General torque values (see scale) is 85nm. Yours making it to 90nm is above that, but held, verifies your at the limit of the stud/nut. Its failing after / above that, just confirms the general torque value is safer than the recommended sprocket torque, which is just slightly too high and will occassionally fail..
Last edited: