 drilling risers
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Joined: Jul 2014
Posts: 45
Greenhorn
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OP
Greenhorn
Joined: Jul 2014
Posts: 45 |
i have just acquired a old set of risers but the bolt is to big ... is it possible to drill out the steering stem ?
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Re: drilling risers
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Joined: May 2012
Posts: 514 Likes: 2
Adjunct
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Adjunct
Joined: May 2012
Posts: 514 Likes: 2 |
Either do that or put a stud into the riser that has been stepped down to fit the smaller hole. There may be a Helicoil or a similar type of thread insert you can use to reduce the tapped hole down to the size hole in the yoke.
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Re: drilling risers
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Joined: May 2010
Posts: 5,720
Check Pants
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Check Pants
Joined: May 2010
Posts: 5,720 |
These be the ones I used, but make sure they are 10 mm to 1//2" adapter_bolts
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Re: drilling risers
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Joined: Jul 2006
Posts: 853
3/4 Throttle
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3/4 Throttle
Joined: Jul 2006
Posts: 853 |
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Re: drilling risers
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Joined: May 2012
Posts: 514 Likes: 2
Adjunct
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Adjunct
Joined: May 2012
Posts: 514 Likes: 2 |
$21.95 for two studs? I suppose that being a machinist has its advantages sometimes.
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Re: drilling risers
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Joined: Feb 2007
Posts: 23,225 Likes: 62
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,225 Likes: 62 |
I turned 2 stainless adapters for mine.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: drilling risers
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Joined: May 2010
Posts: 5,720
Check Pants
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Check Pants
Joined: May 2010
Posts: 5,720 |
I could have lathe profiled some drill rod and cut the threads with die nuts, but modern day high strength bolts actually have the threads forged or rolled if you prefer, onto the shank and are advertised as stronger. The part of the bike I'm holding onto needs to be strong like a big Indian for my sense of well being.
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Re: drilling risers
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Joined: Jun 2012
Posts: 69
Member
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Member
Joined: Jun 2012
Posts: 69 |
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Re: drilling risers
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Joined: Feb 2007
Posts: 23,225 Likes: 62
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,225 Likes: 62 |
I have had mine on now for almost 10 years with no issues I think the stainless is plenty strong for the application. I have stainless bolts in the riser cap too so I have no rust either.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: drilling risers
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Joined: Jul 2007
Posts: 6,060 Likes: 6
Worn Saddle
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Worn Saddle
Joined: Jul 2007
Posts: 6,060 Likes: 6 |
Drilled mine. Probably ruined somebody's chances for a 100 point score at a 2035 Concours. Well, that and a few other things... 
Fidelis et Fortis
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Re: drilling risers
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Joined: Nov 2007
Posts: 1,883
Learned Hand
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Learned Hand
Joined: Nov 2007
Posts: 1,883 |
I am looking to trade my drilled out top yoke for a standard one if that is what you are talking about.  I am going back to some old risers I liked better.
~Brent
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"Nothing you can be is more terrible than what I am." ~ 2007 Black Speedmaster!!
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Re: drilling risers
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Joined: Jul 2006
Posts: 853
3/4 Throttle
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3/4 Throttle
Joined: Jul 2006
Posts: 853 |
Quote:
I am looking to trade my drilled out top yoke for a standard one if that is what you are talking about.
I am going back to some old risers I liked better.
Why...just use metric bolts the hole size is not much different between the metric bolt and the Std bolt
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Re: drilling risers
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Joined: Jul 2006
Posts: 853
3/4 Throttle
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3/4 Throttle
Joined: Jul 2006
Posts: 853 |
I change back and forth between my American risers and the stock speedmaster risers with no problems
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Re: drilling risers
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Joined: May 2010
Posts: 5,720
Check Pants
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Check Pants
Joined: May 2010
Posts: 5,720 |
Brent, find some DOM tubing that is .400" ID and 1/2 .500" OD and you can bush the drillings to fit 10mm or remove for the 1/2" bolt size. web page Hack saw to length and insert in the drilled out holes, you're back to 10 mm
Last edited by Ryk; 12/12/2014 4:59 PM.
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