*** Mini ATV Performance Parts *** Can-Am, Dinli, Arctic Cat, Bombardier, X-treme, E-Ton, Kasea, Polaris, DRR & more... Phone:  (972) 481-8708 Fax:  (469) 916-8068 Email:  Home ATV Parts About Koso Contact Us Find Dealers - Performance Parts - * New Items * All 4-Stroke New! Clutch Engine Intake & Carburetor Exhaust Gauges Suspension Wheels & Brakes Accessories - Performance Kits - Motor Kits Suspension Kits - Pictures - Photo Galleries - Dealers - New Dealer Inquiry - Go Back - BIG BORE KIT Each kit comes complete with piston, wrist pin, top bearing, clips, gaskets, hi-compression head, and cylinder. Direct bolt on with no modifications needed for either kit to achieve 70cc or 99cc. MB014540 kit has 54mm bore. In order to obtain 105cc the crank must be changed to a 45mm stroke. See also: 45mm Crankshaft Part Number: MB014472 (70cc)              MSRP $189.95 MB014540 (99cc to 105cc) MSRP $244.95 Copyright © 2004-2008 Maximum RPM. All rights reserved.