View single post by Jim Ketcham
 Posted: 11-23-2013 01:22 am
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Jim Ketcham

 

Joined: 03-13-2005
Location: Salt Point, New York USA
Posts: 208
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 No changes required. The 40 and 45 are identical in size and mounting. The only difference is the bore size. For a stock 907 the optimal chokes and Venturis are available for both the 40 and 45 thus allowing identical jetting resulting in the same performance.