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Old 04-22-2013, 06:47 AM   #6052
XDragRacer
Beastly Adventurer
 
Joined: Mar 2009
Oddometer: 2,740
Quote:
Originally Posted by rodmuzwa View Post
Thanks for that. So does that mean its simply a swap over and good to go?
Essentially, YES! Your replacement slide is essentially, "DIRECT EXCHANGE."

The 22-cent mod consists of two elements; drilling the vacuum port in the slide to 7/64" diameter (in hope of enhancing throttle response), and shimming the needle (with one or two approximately 0.030"-thick washers, to fuel-enrich the air/fuel mixture from low through upper mid-range throttle excursion).

Why fuel-enrich the mixture when dominated by the needle and neelde jet? Some believe the mixture is sub-optimally fuel-lean as-built, to insure conformance with emissions standards.

Then again, I know of an '08 KLR650 with 55,000 miles of extensive northern and western hemisphere travel, with an absolutely stock-configured carburetor, and a happy rider! (Not I; but an inmate whose technical opinions I value.)

The idle mixture screw adjustment (proposed starting point: 1.75 turns out, at sea level, stock engine) seeks to compensate for factory adjustment, allegedly skewed for emissions compliance.

Your bike, rodmuzwa; whatever works for you, WORKS!

Congratulations on scoring the Harley slide.
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