Helicoil? Other options?

Rickyisms
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Rickyisms
Edited Date/Time 10/6/2020 10:22am
Last time I went riding I noticed my top engine mounting bolt had backed out and I didn’t have any extras. I didn’t know if this would put more stress on certain areas of the frame so I put my bike up for the day.

I got a new bolt and when I threaded it in I realized it got tight, but never stopped turning. I backed it out and noticed a couple threads came out with it. Now I’m stuck on what my best option is here. Helicoil? Tapping to a larger size would mess with my engine hangers so I don’t want to go that route.
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Rickyisms
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Rickyisms 10/5/2020 10:37pm
10/5/2020 10:37pm
Definitely want to do it right. I’ll have to look into timeserts in the AM. Thank you
CarlinoJoeVideo
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CarlinoJoeVideo 10/5/2020 10:49pm
10/5/2020 10:49pm
I stripped a few threads on the same bolt on my KTM 150. I actually found a bolt that was just a little bit longer and it worked fine. Torqued and has held in place.
Rickyisms
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Rickyisms 10/6/2020 6:10am
10/6/2020 6:10am
CarlinoJoeVideo wrote:
I stripped a few threads on the same bolt on my KTM 150. I actually found a bolt that was just a little bit longer and...
I stripped a few threads on the same bolt on my KTM 150. I actually found a bolt that was just a little bit longer and it worked fine. Torqued and has held in place.
Was it from the same bike or do you remember where you found it?
FGR01
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FGR01 10/6/2020 6:44am
10/6/2020 6:44am
According to the parts diagram, that is an M8x20 bolt. The 2 bolts that hold your exhaust pipe on are M8x30 so they are 10mm longer reach. Try one of them to get an idea. 10mm might be too much. Maybe stack a few washers. The handlebar clamp bolts (4 pinch bolts) are M8x25. Check those too. You'll have to consider the type of head and any unthreaded shoulder on the bolt.

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kb228
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kb228 10/6/2020 7:02am
10/6/2020 7:02am
Id get a key locking thin walled thread insert for that. Mcmaster sells them. Timeserts are expensive and honestly its not going to be any different than a keylock.
Rickyisms
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Rickyisms 10/6/2020 7:35am
10/6/2020 7:35am
kb228 wrote:
Id get a key locking thin walled thread insert for that. Mcmaster sells them. Timeserts are expensive and honestly its not going to be any different...
Id get a key locking thin walled thread insert for that. Mcmaster sells them. Timeserts are expensive and honestly its not going to be any different than a keylock.
I’ll look into them. I definitely want an insert of some type rather than jamming random bolts in and jacking it up even worse.
charlie68
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charlie68 10/6/2020 9:34am
10/6/2020 9:34am
Can that be drilled and thru bolted or is there a coolant passage in the top of the cylinder?
btroxler
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btroxler 10/6/2020 10:22am
10/6/2020 10:22am
You should have enough meat there to use the "Keensert" as mentioned above from McMaster Carr. I have used both for this application, helicoil and keensert as well as welding them up and re-tapping.

Either will work for you. Good Luck

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