Just two good reasons (there are others) to have an "expert" check it is to make certain the inching pedal adjustment is functioning properly & make any necessary adjustments or repairs before you incur any 'big check books" repair costs the other other is to check for excessive fork wear, especially at the heel of the forks too much wear (usually caused by dragging the fork heels on the ground) can cause major issuess - damaged product or personal injuries or worse.