BF5 Carb Mystery?
I have a 2000 BF5 that I recently acquired. Idle is slightly erratic. Will idle down like a million bucks for a good spell, then wants to sputter out until I briefly juice the throttle. I stripped and cleaned the carb once already, but likely could have done a better job. Much improved after the first cleaning though. Now here's my mystery. Looking at my shop manual, and the parts diagram on here when looking for new gaskets, I realize that my carb does not have a pilot screw. There is a solid plug where everything I read says the pilot screw should go. All I have is two fixed jets and an idle speed screw. I wonder if the lack of adjustment capability is hurting my idle performance?
I'm considering getting a whole new carb, but I find two different part numbers (16100-ZV1-E01 and 16100-ZV1-E02). Anybody know how these two part numbers are different? (perhaps one has the pilot screw and one doesn't?)
Any other possible causes for the idle dying other than carb? can't imagine what though. Will likely replace the fuel line/primer/connectors as well, just to be sure.
I did adjust the coil laminates and replaced the plug after a decarb treatment. That combined with the first carb cleaning made a big difference, but still not good enough.
Should I check my valve clearance as well?