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Author Topic: Vintage gasoline class question.  (Read 2131 times)
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1gsxrclosertodivorce
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« on: January 26, 2010, 12:37:18 AM »

The rule book says....

12.I. VINTAGE: GASOLINE “VG” *
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 .050” (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
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02 GSXR 600
RWB - 140.055mph.
Stainless1
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Robert W. P. "Stainless" Steele Wichita, Kansas



« 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?
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Stainless
Red Hat 228.039, 2001, 65ci, MSA Bockscar Lakester with a little N20 
MSA Bockscar Lakester #1000 my fastest mile 245 and change, 84 ci turbobusa motor... but Corey's 233 MPH H/BFL record is still 3MPH faster than mine.
saltwheels262
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« Reply #2 on: January 26, 2010, 06:23:27 PM »

that sounds about right.

franey
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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 -- made a 2 state change in ZIP codes

" it's not as easy as it looks. "
                            - franey  8/2007
wobblywalrus
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« 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.
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panic
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« 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?
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1gsxrclosertodivorce
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« Reply #5 on: February 02, 2010, 12:37:50 AM »

That quote is from the 09 rule book cheers

Cheers,

Andy
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02 GSXR 600
RWB - 140.055mph.
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