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Valve stem question for BUB / AMA
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Topic: Valve stem question for BUB / AMA (Read 4649 times)
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Cole222
Full Member
Posts: 70
Valve stem question for BUB / AMA
«
on:
August 06, 2008, 09:24:55 PM »
My rims have angled metal valve stems that are welded in place. With this in mind how would the following rule apply?
"Angled valve stems must be safety wired to resist centrifugal force deflection."
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"Form and function are the opposite sides of the same coin." R Reagan
ol38y
Sr. Member
Posts: 686
When all else fails, gas it!
Re: Valve stem question for BUB / AMA
«
Reply #1 on:
August 06, 2008, 11:24:04 PM »
You might want to send Drew an email. He is the AMA Tech steward that I know of.
Drew (AMA Tech)
drewsmcserv@verizon.net
Larry
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Larry Cason
Bakersfield,CA It's a dry heat!
2010 BUB 1350 M-PG record
2012 Speedweek 1350 A-PG record 169.975
2014 El Mirage Dry Lake 1350 A-PG 172.651
Dean Los Angeles
Hero Member
Posts: 2370
Re: Valve stem question for BUB / AMA
«
Reply #2 on:
August 07, 2008, 01:37:24 AM »
Experience has shown that the centrifugal force at high speed is going to break that off. You will have to tie it back to the nearest spoke. Yeah, ugly, but necessary.
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Well, it used to be Los Angeles . . . 50 miles north of Fresno now.
Just remember . . . It isn't life or death.
It's bigger than life or death! It's RACING.
John Noonan
Hero Member
Posts: 3606
306 200+ mph time slips. 252 mph on a dirtbike
Re: Valve stem question for BUB / AMA
«
Reply #3 on:
August 07, 2008, 01:46:13 AM »
I have a non related question..what bike are those rims from..?
J
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Cole222
Full Member
Posts: 70
Re: Valve stem question for BUB / AMA
«
Reply #4 on:
August 07, 2008, 06:58:34 AM »
Thanks for the input. I will email Drew for input.
The bike is a Triumph TT600 MPS-BG.
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"Form and function are the opposite sides of the same coin." R Reagan
maj
Sr. Member
Posts: 743
Re: Valve stem question for BUB / AMA
«
Reply #5 on:
August 07, 2008, 06:47:59 PM »
Now that will be interesting
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Cole222
Full Member
Posts: 70
Re: Valve stem question for BUB / AMA
«
Reply #6 on:
August 11, 2008, 05:50:37 PM »
I spoke with Drew and he was extremely helpful in clarifying a few questions. As to the angled valve stem he indicates that I will be ok since it is one peice coming through the rim and is welded. The rule being originally designed for spoked rims and rims with a rubber seal and nut holding the valve in place. I am looking into cutting them off and replacing with straight stems though for my own peace of mind.
Cole
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"Form and function are the opposite sides of the same coin." R Reagan
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Landracing Forum
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Bonneville Motorcycle Speed Trials
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Bville Motorcycle Speed Trials Rules Questions
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Valve stem question for BUB / AMA