2013 Cali Classic 125cc. 11000 miles. I had a bogging problem at 30 mph, but a new carb solved that mostly. I get bogging at 45mph and it won't go faster.
I have not checked the jet size but there is still plenty of room to adjust to make richer if it was needed.
I have thoughts:
1 place marks on the drive and driven face with a marker and see just how far up the pulley the belt goes. Making sure the belt is going all the way to each end.
After that it's just roller weights. The big spring. I'm trying just to get to factory. I could go 55 and got 90 mpg when new.
Not smoking, compression test is still about 185 WOT. New plug and ignition coil, belt fairly new, carb new, air filter looks new, tires are new, muffler is new, head is new and new head gasket. Always had a trunk and windshield. Got it in July of 2012, did great until Oct 2012, then bogging in cold (60 degrees Fahrenheit) weather. Bogging is mostly gone. Now to get the top end back and mpg.
I need thoughts.
I cannot think of what could cause this. Cold weather could cause some loss in top end and mpg but 10 mph with flat ground no wind, and 63 degrees Fahrenheit?