Jetting help

Related:
Create New Tag

11/28/2016 9:50 AM


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?
Edit
|



11/28/2016 10:57 AM

What jetting are you using? Have you looked at what PRO CIRCUIT recommends for jetting?

|

11/28/2016 1:48 PM

|

Positively, absolutely 110% obsessed with anything MOTO.

11/29/2016 6:40 AM

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.

|



11/29/2016 7:55 PM
Edited Date/Time: 11/30/2016 6:48 AM

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

|

11/29/2016 9:48 PM

|

The older I get, the faster I was.

11/29/2016 9:55 PM

Nothing wrong with your "shitty Mikuni"...most "shitty" carbs are set up by shitty tuners

|

Tomac and/or Anderson for 2020.....