Hoser's Pilot and Odyssey Current Jetting Specs This page is for information only don't be a mutt and try to use these settings, every engine requires different jetting yours may not require the same as mine does :-) 440jets Pilot (using a 440 snowmobile engine out of a 9500 Blizzard with a 38mm Mikuni Super BN carb) HI SPEED 125 Spares 120 LO SPEED 67.5 spares 65 62.5 Challenger 39mm PWK 10-04-02 72RAB HQ (Running a Mossbarger 250 Liquid Cooled Engine) Challenger project is here Changed the pilot jet from a 55 to a 38, was to lean went to a 45 still slight hesitation beck to the 55 will have to try a 50 in future. 10-18-03 air screw 2 turns out 140 main jet EEG needle clip one notch up from center position Notes: With 55 pilot jet the engine was running real rich from idle to 1/2 throttle no hesitation and would rev out clean just leaving a dark plug and the blue trail of smoke when running slow around the yard, went to a 38 and now the bottom end is clean (no smoke) but it hesitates, swapped to a 45 and the hesitation is less but is still not right, will try a 48 or 50 next. My Pilot 39mm PWK UP DATE 6-09-02 Settings when I was running my full modified Pilot engine, porting, coolhead 49cc dome, 39mm PWK, Power Pros REV pipe, long silencer, Power Bloc clutch with 12 washers 3-3/4" spring, modified stock airbox with dual openings and prefilters. Jetting was good from 0 to 5000' elevation in the East, South, Mid West riding areas, richer settings were needed for dry desert locations below 3000' elevation. Changed the pilot jet from 58 to a 48 air screw 2 turns out 160 main jet DGH needle clip one notch up from center position Number on the side of my carb 72RA4 NCQ Notes: bottom end always has been real fat just trying to clean it up some, 48 made a good improvement, think I will stick with it, I also swapped needles with the wifes Pilot (get the number of needle and put here) the needle in hers is much leaner, works great in my machine! Wifes Pilot 39 mm PWK 2-15-04 Engine is ported, modified stock reed cage, Power pros Torque pipe, cool head 49cc dome long silencer, Power Bloc clutch 3-3/4 spring 12 washers, modified stock airbox with dual openings and prefilters. Slide is a #6 Needle is DGG on bottom notch Rest is unkown at this pointNew needle added to collection is a DGG 7-16-03 Wiggens current base line jetting 18 Apr 2005 39mm PWK slide #6 needle DGH set at the second notch from bottom main came with a 160 installed a 165 pilot jet #60 Air Screw 1-1/2 turns out hoser enhancements to the cylinder and headOften Imitated But Never Duplicated