Headstock

Headstock bearings are the most commonly replaced components after the chain and tyres! Blade owners love wheelies - but most aren't that good on the throttle and the bikes suffer heavy landings, which wreck headstock bearings. To check them, pull the bike over on its sidestand until the front wheel is off the floor. Now move the bars from left to right. They should move freely with no notches. Put the bike back down and wheel it forward five feet and then grab the front brake hard. If you hear a clonk the bearings may have given up the ghost.