13. REAR WHEEL/SWING ARM/ HYDRAULIC BRAKE Mongoose/KXR 90/50 Remove the four bolts and rear axle hub. Bolts Axle Hub INSPECTION Replace it if the rear axle is scratched (excessively) or damage. Replace if splines and threads of the rear axle is wear or damage. Measure the rear axle run out. Service limit: less than 1.5mm Replace if it is out of specification. Do not attempt to straighten a bent axle. Replace it if the driven sprocket is cracks or damage. Replace it if splines of the driven sprocket is wear or damage. Splines 13-7