stock hp on the 06?

how much does the 06 make stock?

49 to 51

perfect amount for a 450 imo... :ride:

just enough

47 hp

Makes me wonder if 5-valve heads are unecessary. The Yamaha Raptor 660R (5v) was replaced by the 700R (4v) for 2006.

Start getting into even bigger bores/strokes and you'd probably see the advantage of bigger (or in this case more) valves become apparent.

J

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