Oil filter cover threads stripped casing XT recommandation!

[dzl]

I have a few XT's and TT's. Replaced all the top filter cover bolts with 5mm longer 85mm length version available from Yamaha part number
91317-06085. Never a problem.

If you do need to helicoil the stripped threads then make sure to use the 12 or 15mm length version 6mm helicoil. The standard helicoil inserts that come in the kits is quite often only 6mm long. The thread is 18mm long in the case.

The problem with the 10nm torque figure that is recommended by Yamaha is that it is for totally dry threads, as are all of the other engine assembly torque figures. If you are torquing up threads that have oil on them, like the filter cap bolts usually have, then the torque figure needs to be reduced by around 25%

[njenduro]

So basically if my 90 xt 600 is not leaking you suggest on cuttings 3 threads off on the bolts to prevent from stripping threads. Thanks

[xtrock]

Originally Posted by njenduro

So basically if my 90 xt 600 is not leaking you suggest on cuttings 3 threads off on the bolts to prevent from stripping threads. Thanks

Buy new bolts, they are already old and weak on threads. 91317-06085

[njenduro]

Thank you on this, also should I cut some threads off on these before installing

[xtrock]

Originally Posted by njenduro

Thank you on this, also should I cut some threads off on these before installing

No they are correct length.