Stripped bolt hole.

[steve murdoch icoa #5322]

All the little snags that a medium-skilled, backyard mechanic like myself keep finding are slowing me to a snails pace. Okay, no more whining.
One of the engine front mount bolt holes in the frame is stripped.
Will a heli-coil be a strong enough solution?

[NobleHops]

All the little snags that a medium-skilled, backyard mechanic like myself keep finding are slowing me to a snails pace. Okay, no more whining.
One of the engine front mount bolt holes in the frame is stripped.
Will a heli-coil be a strong enough solution?

I repaired one of these with a Timesert and it worked perfectly and held the 28 or so lb ft of torque easily. I bought my buddy some extra inserts for loaning me this kit - for the price of shipping to and fro you can probably borrow it and use one of his inserts. This kits are ~$100+ or so as I recall.

PM me your address and I will ask him if he's up for that.

Pickup the repair photos (and captions) on page 13 of the gallery here: http://noblehops.smugmug.com/Motorcycle ... 4012_d7QpB

The kit:


Photo before:


Photo after:




N.

[steve murdoch icoa #5322]

Help like this keeps this site going strong.
Thanks, Nils.
The tap i used to try and clean it out was an M10x1.25. Correct?
pm sent.

[EMS]

I think Nils is wasting his time and talents in the E-business. He should take up something more serious, that requires and enables him to use metal tools....

[NobleHops]

I think Nils is wasting his time and talents in the E-business. He should take up something more serious, that requires and enables him to use metal tools....

I am a tadpole in the pond with you guys mechanically, you kindly ignore the fact that this repair was necessitated by my ignorance and carelessness. But I'm learnin'.

N.

[NobleHops]

Help like this keeps this site going strong.
Thanks, Nils.
The tap i used to try and clean it out was an M10x1.25. Correct?
pm sent.

Yes, correct, that is indeed the size and pitch. Interestingly, I found myself reading about a member's drag bike a few minutes ago and he had notated in his service history the strip and repair of this very hole. I happen to know how mine was stripped <coughSIXTYPOUNDFEETcough>, but I wonder if this location is subject to more stress than others somehow.

N

[Don]

Heli-coils and the like actually give you much STRONGER threads than the originals . . . . especially in aluminum but also in steel too

The much larger threads that you tap into the hole to hold the heli-coil are significantly stronger than the original smaller ones that held the bolt and then the heli-coil itself is made of much better metal than the steel of the frame

Don