Jetting help

frosted flakes

Have an 04 cr125 with the shitty mikuni carb. Have a pc platinum w an r304 and v force 3 reeds, still has awful bog coming off the bottom end. I hate tuning carbs and I've pretty much given up. It's about the 60's here in Phoenix and is about 1200-1300 ft elevation. Any ideas on how I should rejet and lean it out?
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xnationalwrench 11/28/2016 10:57am
11/28/2016 10:57am
What jetting are you using? Have you looked at what PRO CIRCUIT recommends for jetting?
frosted flakes 11/29/2016 6:40am
11/29/2016 6:40am
xnationalwrench wrote:
What jetting are you using? Have you looked at what PRO CIRCUIT recommends for jetting?
Yes, family friend who owned a power sports dealer/shop rebuilt it and put the recommended pro circuit jets in it.
seth505
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seth505 11/29/2016 7:55pm
11/29/2016 7:55pm Edited Date/Time 11/30/2016 6:48am
Those bikes just have zero bottom end so are you sure you're not just lugging it too much? I just built an 03 and it runs awesome (with the Mikuni) but it'll bog on the very bottom under power with no clutch.

I usually ride around 1000 feet in So Cal and my jetting right now:
Main: 430
pilot: 40
needle: 2nd clip
air screw: 1.75 out

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BobPA
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BobPA 11/29/2016 9:55pm
11/29/2016 9:55pm
Nothing wrong with your "shitty Mikuni"...most "shitty" carbs are set up by shitty tuners

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