I have a couple of 2T pocketbike race engines (18k redline), and that mid-range falter usually means it is set a tad too lean. One of my bikes has an adjustable main jet, and a verrry slight tweak towards rich should clear it up.
Unloaded, from idle, if you full-throttle blap it, does it instantly rev hard and cleanly or does it slightly falter? If it falters every so slightly, then richen just the smallest amount.
Steve
"I am a licenced motorcycle instructor, I agree with dangerousbastard, no point in repeating what he said."
"read what Steve says. He's right."
"What Steve said pretty much summed it up."
"I did axactly as you said and it worked...!!"
"Wow, Great advise there DB."
WTB: Hyosung bikes or going or not.
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