Cheap And Discounts 8mm 0.31" With 10mm 0.39" Chain Roller Tensioner Wheel Guide Kit For Baja DB30 Doodlebug Dirt Bug Mini Bike Wholesale. Buy Directly From Merchant Karting Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.