Thanks bak.
I just got this from Drew:
"...I hope this is of help for you in determining your specific class.
Please note, the following is in regards to AMA & F.I.M. rules only,
as are used at the BUB Motorcycle Speed Trials.
Your allowable engine displacement limits are as follows,
per 2008 AMA Racing Supplemental Regulations/BUB Motorcycle Speed Trials.
http://www.speedtrialsbybub.com/2008_event/AMA-BonSR%27s-2007-v5.pdfCHAPTER TWO:
2.A. Engine Displacement
Displacement of the engine is as stated by the manufacturer.
Displacement in excess of the stated manufacturer's displacement
will advance the motorcycle/streamliner to the correct class.
The ONLY exception that allows a larger displacement is in the following engine classes.
CHAPTER TWELVE:
Engine By Classification
Page 44 - section 12.I. "VG" and section 12.J. "VF" (This being the Vintage Classes),
Where a +.050" overbore is allowed on all engines produced prior to 1956.
This includes both Flathead and OHV engines.
F.I.M. rules...
ALL Engine Displacements are absolute.
Meaning if you enter a 750cc class be it non-streamlined, partially streamlined, or streamlined,
your engine must measure no more than 750.000cc.
Otherwise your machine will be moved up to the next larger engine displacement class...."
So that settles it.
Thanks a lot for the clearification Drew.