Jerryhawk250 sent me a service manual with the same engine, and in the transmission troubleshooting area, I found a page that gives me some ideas to what could be messed up with it.
TROUBLESHOOTING
Hard to shift
• Incorrect clutch adjustment
• Damaged shift drum cam groove
• Bent shift fork
• Bent shift fork shaft
Transmission jumps out of gear
• Worn gear engagement dogs or slots
• Damaged or bent shift fork
• Bent shift fork shaft
• Damaged shift drum stopper arm
• Broken shift linkage return spring
• Damaged shift drum grooves
Excessive noise
• Worn connecting rod big end bearing
• Bent connecting rod
• Worn crankshaft main journal bearing
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2014 Hawk 250
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