124cc SE-PRO BIG BORE KIT. Best of SOHC BIG BORE HEAD with long-time Kitaco experiences! Big bore kit for extremely high power & durability with exclusively designed combustion chamber for 54 original piston & big valve! Doing that is against U.All our items are 100% authentic. The item "KITACO 124cc SE-PRO BIG BORE KIT MONKEY/XR50R/CRF50F/XR70R/CRF70F #212-1123830" is in sale since Tuesday, April 2, 2019. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Big Bore & Top End Kits". The seller is "kitacoengineering" and is located in Osaka. This item can be shipped worldwide.