are you checking oil level with bike straight up. screwing dip stick in and then out to get reading. You can't check it on kickstand.
The professional tuners say its best to run it a 1/4 of a quart low. It helps preventing to much oil build up in air cleaner.
Before you replace your belt inspect it for cracks on the lugs. Your belt should go for 80K if its not dry rotted
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