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Hi Joe, welcome aboard.
WEll one proven mod that worked for me was a simple $14 dollar sprocket change, that was the total investment and it changed the characteristics of the bike.
I have the 520 chain on my bike and it went from a 12 tooth sprocket to 13 tooth sprocket up front.
made the bike more usefull in street traffic and didn't spend too much time shifting nor winding out the motor to keep up.
Other then that a few turns of the idle mixture screw seem to benefit my bike , it came a little too lean at idle, improved diveability.
Next will be too move the carb needle down a notch ( richer) free up the exhaust and possibly a fuel jet change.
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