17-07-14, 01:21 PM
(16-07-14, 11:59 PM)AyJay link Wrote: [quote author=GrahamB link=topic=14020.msg158630#msg158630 date=1405491468]
I considered the forces. Caliper is behind fork leg getting forced against it when brakes applied. Still not entirely sure what I will go with. See how I feel when it's done.
When you considered it, did you work out exactly how much torque is being applied, how strong a helicoil is and how well the insert will be seated? Like the Yamaha engineers blah blah...
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There is no torque being applied on the helicoil. When you put on the brake the caliper is putting a shear force on the mounting bolt at 90 degrees to the bolts long axis, there are no braking forces going through the helicoil at all.
All the helicoil is doing is putting up with the twisting forces you put on the bolt when doing it up -and that's it. Braking doesn't come into - it if you are talking about the 'strength' of the helicoil. Helicoils are usually well up to the job in most situations if properly inserted.
Having said that -I'd fit a new caliper because it's less messing about -not because helicoils are not up to it.