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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Broken foot peg bolts
Post Info TOPIC: Broken foot peg bolts
Green Chile ADV 1


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Broken foot peg bolts
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yawn550 cord-lock paracord. Don't leave home without it.no I should have stayed home today. Landed a nice air and sheared off a right side foot peg bolt. Lashed it and then headed out. I avoided standing. Then lowsided in 3rd gear in the sand and broke my starter switch AGAIN! I just replaced it. Thank goodness I got a cheap one off ebay!. LOLevileye



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TTRfan


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Bad luck but that's an easy fix. The broken bolt should drill out easy wink

Looking at the photo the broken end seems rusty so may have fractured a while ago.

PS Good jump photo biggrinbiggrin



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peteBLUEttr


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Yeah right nice jump photey, well captured that man smile



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Pete. South Somerset, England.
Green Chile ADV 1


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I got some Grade 10.9s today. Anyone know what grade OEM bolts are?



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peteBLUEttr


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I'd say a high tensile strength bolt like a 10.9 will work perfect.

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Pete. South Somerset, England.
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Drned it. got the wrong pitch. Anyone know what the pitch should be on these? 



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peteBLUEttr


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You crazy Americans with your imperial fixings and whitworth threads n stuff. Its a japanese built yamaha bike so i would try sticking a standard metric bolt in there?...

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Pete. South Somerset, England.
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Yes. I got metric bolts and they are the wrong pitch. They are course not fine. lol



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TTRfan


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The manual says the "thread size" is M10  



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peteBLUEttr


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You sure someone hasn't tapped it out before for a coarse thread?..



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Pete. South Somerset, England.
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Looks like the holes are M10 fine and I got M10 coarse. I will find the right bolts.

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peteBLUEttr


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It surprises me that Yamaha would use fine thread for a footpeg hanger, did you use a thread guage?

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Pete. South Somerset, England.
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I don't have a tread gauge. I'll do that in town manana.

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petenz


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peteBLUEttr wrote:

It surprises me that Yamaha would use fine thread for a footpeg hanger, did you use a thread guage?

 they do on the XT660 aswell 10 X 1.25... normal 10mm bolt has a 1.5mm pitch...

so the bolt you are after is most lightly a 10 X 1.25pitch...

 

 

.



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TTRfan


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Agree - just checked and it's definitely M10 x 1.25



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Green Chile ADV 1


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Thanks guys!!! Yeah the fine threads have more resistance to loosening from vibration. It's a good call on Yami's part. I'm heading back to Taos this morning for the 10mm 1.25 bolts in a 10.9 grade. I live 20+ miles from town!

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peteBLUEttr


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There are arguments for both fine and coarse thread, course thread wont strip as easy but yeah fine thread is better with vibration. Maybe good upgrade then going up to a higher tensile strength bolt like 10.9 or 12.9 if you can get hold of them... I can imagine landing a jump stood up on the pegs causes much stress! I have heard of few people now breaking em on ttr's...



-- Edited by peteBLUEttr on Tuesday 2nd of June 2015 05:46:54 PM

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Pete. South Somerset, England.
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M10 1.25 pitch Grade 10.9



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