yamaha viper primary clutch torque ?

[viperboy101]

whats the torque spec on the primary clutch please and thank you

 

[mrviper700]

you tighten it to 85lbs to seat the clutch on crank taper, then loosen the bolt and tighten back to 43ft lbs

 

[09nytro]

good to know just put mine back on and did itr to 85ftlbs Im guess i have to back it off then retorque

 

[KEVIN]

So 85lbs is ok on these bolts that are getting older?
What about the secondary?

 

[phatkid]

good info to know, didnt know that process, thanks

 

[mod-it]

It's a tapered shaft, so the 85 lbs presses it on, and then the 43 lbs is just to keep the bolt tight.

I just tighten the secondary until I think it is "good". It isn't a tapered shaft...

 

[KEVIN]

So it isn't a problem to torque to a bolt that is 14 years old (in my case)
Don't they fatigue?

 

[andrew k]

So it isn't a problem to torque to a bolt that is 14 years old (in my case)
Don't they fatigue?

you should be just fine. the main bolt is of a large size and in itself could handle many more foot lbs of pressure then what is recommended even with it being older. steel is great at retaining its rigidity. look at some of the classic cars that still drive around today. tyipcally when they start badley oxidozing (rusting) is when you could run into problems. if the threads look in good shape i wouldnt sweat it jmo.