So my 83 Honda Express was running like a dream for the past couple of months, then one day it was messed up. It bogs down and then dies at WOT once engine is warm.
Bike is stock except the airbox is removed, no filter ATM and upjet from 75 to 80. Has been running very well like this for most of the summer.
I have cleaned the carb VERY well and it is perfect. Plunger needle is coned and not bulged or mis-shaped. Jet is also brand new.
I have replaced the spark plug with a brand new one and properly set the gap.
Fuel is freely flowing from the tank and thru clear fuel filter. Petcock is new as of April I believe. Does NOT appear to be a fuel delivery issue.
I read on one forun that it could be the ignition coil acting up under heat, but it is mounted in front of the head on the frame, and I am not sure that would be it, but open to suggestions.
I was also told it could be piston rings just getting worn out dues to mileage (~6000 miles). This could be it, but from perfect one day up until I parked it and then crap all over 1 night?
Any help is appreciated. If you need any more info, please let me know!
Thanks in advanced.