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Discussion Starter · #1 ·
I just ordered some jets and plan to follow the carb settings given by Jenks Bolts (135m, 42p, stock needle w/1 shim, 3 turns.) I will be running predators with a unifilter. Any opinions or experience with this set up your comments would be appreciated.
 

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That'll probably get you close, I dont use the airbox but I'd say your close.

Should you do a airbox elim expect to run something on the order of 150/155 main-42/45 pilot and 1 to 3 shim's on the needle and about 2.75 to 3 turns out.
 

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kliff, Help me out. Every time I go to Dinqua's site and then to Pats calculator it looks like its set up for Americas and Speedmasters. Especially the 790s. For example it starts at 42 pilots. Thanks.
 

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Don't know what to tell ya.....
I have a 790 Bonnie with stock needles, and went to 42 pilots to ease some starting issues, and it worked out fine for me.

Just from doing some post comparisons, it looks like the 865's are jetting up pretty close to the 790's when still using the air box and either a single K&N or Uni.... but eeing as Dinqua has upgraded to a 904...I think he could answer you jetting calculator questions better than I can.

All I can tell you is it's "da bomb!" for 790's.
 
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