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Old 06-19-2011, 08:54 PM
datunk's Avatar
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Join Date: Mar 2011
Location: Sheridan, WY
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Question 02 500 HO main jet size and pilot jet set for high altitude

I've a BST40 carb and regularly ride 4000ft to over 9000. When trying to accelerate going up grade and sometimes down, my Sportsman starts sputtering at about half throttle. At this moment the carb is soaking in cleaner, and thought while I had it out would possibly go with a smaller main jet. Also would appreciate suggestions on number of turns for the pilot jet. Ride the Big Horn Mts. 3 times a week regulating reservoirs and would rather get this one running right and not have to go back to my 23 yr. old 250. Thanks in advance.
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