Was Steve Platers 2008 Yamaha R6 legal for the first 600 race having an 07 engine in a 2008 bike Steves own words.
We would all like to know the answer to this.

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2.9.7 PARTS AND PRODUCT UPDATE
Any change in the specifications of the following parts of a FIM homologated
motorcycle will require a new homologation of the model:
• Crankcase
• Cylinder
• Cylinder head
• Crankshaft, connecting rods
• Camshafts, valves
• Carburation instruments
• Frame: main dimensions [in relation to wheelbase, caster, steering
head angle, relative location of the swing-arm, relative location of rear
shock absorber(s) and linkages]
• New range of engine prefix numbers
• New range of frame prefix numbers