bigger or smaller PJ's?

paulson_shawn · Posted: July 11, 2007, 12:26 am Post subject: bigger or smaller PJ's?

if i want to richen up my low end on cv38's do i go bigger or smaller on the pilot jets? out on the screws is richer but i'm not sure if they're metering the air or the fuel.

Retiredgentleman · Posted: July 11, 2007, 1:12 am Post subject: Re: bigger or smaller PJ's?

Pilot jet and main jet work the same way i.e. bigger jet will give more fuel.

xsjohn · Posted: July 11, 2007, 5:54 am Post subject: Re: bigger or smaller PJ's?

I am experimenting with the larger pilot jet on my 80......I have been having to run at 3 1/2 turns out and with a slightly bigger pilot I have to turn the screw in to 2 1/2 turns or so.....Dropped 15 degrees off the cylinders and made it run perfect.....The pre 1980 carbs may be different and seem to have a big enough pilots..........
John

paulson_shawn · Posted: July 11, 2007, 10:28 pm Post subject: Re: bigger or smaller PJ's?

i went from 135 mains and 27.5 pilots to 142.5 mains and 30 pilots. it still doesn't pull hard on the top end and it still hovers when i blip the throttle at idle and sometimes still pops through the filters. i have stock head pipes and mufflers with holes drilled in them, pod filters, and i live at 3200 ft altitude so i thought those increases would b enough, but i did order 145 mains and 35 pilots just in case, so as soon as my bike cools down i'll try those. i did have the needles raised all the way before to compensate for the small jets and now they're in the middle notch so i guess it was an improvement

paulson_shawn · Posted: July 12, 2007, 1:05 am Post subject: Re: bigger or smaller PJ's?

Now i'm at 35 PJ's (2 up) and 145MJ's (4 up) and 4th notch down on needles (1 up) . It pulled so hard on the test run that it almost scared me...... ALMOST Laughing

. It idles sweet , runs way cooler and quieter too. Makes owning $18 worth the jets that are too small worth it!!

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