Carb AFR? advice added exhaust and jet kit
hey guys i just rebuilt both of my carbs on 05 brute force 750.
HMF 3/4 exhaust is the only mod im aware of.
I added 155 jet front and 165 rear per what i read is recommended from HMF website. im about 1,000 ft above sea level.
Im more of a fuel injection guy but i want to try and get these carbs in the sweet spot without removing carbs and plastics 10 times making adjustments.
I have a test tool wide band 02 from (innovate motorsports LM1) i use when tuning other projects of mine. I havent been able to find what the AFR(air fuel ratio) should be both idle and WOT?never tried using the wide band on a ATV either. but well see what happens.
im at 2.25 turns on mixture screw(I read thats stock). looks like whoever owned it bofore me had it about 3 turns out with factory exhaust. it was a bear to start. but i also found both intake boots carb to head were cracked badly. would really only run decent with choke on. some backfiring and fuel spitting out carb.
does anyone know what idle AFR and wide open throttle AFR should be? this way i can get on it without plastics and log my results.
i havent done much to this 750 since i bought it, performace wise. just exhaust since it was cracked probally from running lean.
in my fuel injection offroad jeeping world, o shoot for 14.7 afr idle and 12.7afr WOT.