Author Topic: Vintage gasoline class question.  (Read 3133 times)

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Offline 1gsxrclosertodivorce

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Vintage gasoline class question.
« on: January 26, 2010, 12:37:18 AM »
The rule book says....

12.I. VINTAGE: GASOLINE ā€œVGā€ *
Motorcycle engines production date prior to 1956. Flathead, OHV,
and 2 stroke engines must retain the O.E.M. Heads, Cylinders, and
Crankcases originally installed at time of factory production.
Allowable overbore in this class is .050ā€ (inch).
GASOLINE ONLY. See section 2.F.

My question...

Are there any limitations on modifications (obviously not a supercharger or turbocharger), both internal and external that can be made to "the O.E.M. Heads, Cylinders, and crankcases originally installed at time of factory production"?

Thanks in advance,

Andy
02 GSXR 600
RWB - 140.055mph.

Offline Stainless1

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Re: Vintage gasoline class question.
« Reply #1 on: January 26, 2010, 01:09:35 PM »
multiple answers to your question, depends on class...
Production... no external changes, all the internal you want
Modified, Altered and Special Construction Streamliner... all the internal and external changes you want...
You can run them blown in all but production.
Anyone have a different take?
Stainless
Red Hat 228.039, 2001, 65ci, Bockscar Lakester #1000 with a little N2O

Offline saltwheels262

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Re: Vintage gasoline class question.
« Reply #2 on: January 26, 2010, 06:23:27 PM »
that sounds about right.

franey
bub '07 - 140.293 a/pg   120" crate street mill  
bub '10 - 158.100  sweetooth gear
lta  7/11 -163.389  7/17/11; 3 run avg.-162.450
ohio -    - 185.076 w/#684      
lta 8/14  - 169.xxx. w/sw2           
'16 -- 0 runs ; 0 events

" it's not as easy as it looks. "
                            - franey  8/2007

Offline wobblywalrus

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Re: Vintage gasoline class question.
« Reply #3 on: January 26, 2010, 10:23:21 PM »
Stainless is pretty accurate.  In addition, the displacement after the mods must be appropriate for the class.

Offline panic

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Re: Vintage gasoline class question.
« Reply #4 on: January 30, 2010, 10:19:42 AM »
Not sure if that exact wording is new?
The rules as I remember them specified original heads and cases (but not barrels) for OHV, original cylinders and cases (but not heads) for side-valve, yes?

Offline 1gsxrclosertodivorce

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Re: Vintage gasoline class question.
« Reply #5 on: February 02, 2010, 12:37:50 AM »
That quote is from the 09 rule book :cheers:

Cheers,

Andy
02 GSXR 600
RWB - 140.055mph.