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650 is how it was equipped originally , if it's stock stay with the 650

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thats what I was thinking ... stock exhaust... the whole bit.. org pistons and cam... std bore the only diff is a eddy performer which is not a big upgrade??

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Not too big of an upgrade, Saves you a few pounds
over the iron manifold. I believe the 69' RR
came through with 650 Carter AVS's, sort of like
the AFB, but the primary barrels are SLIGHTLY smaller than the secondary barrels. Not to be confused with the Carter Thermoquad!! All in all,
an easy carb to tune and maintain. A good rebuild/
jetting adjustment (for todays crappy gas) and some ignition timing changes, you're off and runnin'!!!