Brand New Bolt On 124 Big Bore Kit. Upgrade your OEM 107 CI.8 w/ 4 3/8 stroke to this bolt-on 124 CI kit. This is a true bolt on kit, no case machining required!
Upgrade your 107 M8 motor to the largest bore size possible, without required machining of your cases. This is as simple as big power gets, cylinders, pistons and gaskets included.
New Aftermarket Cylinders (1 Pair in 4.250 Bore). Wiseco 11:1 Armor X Piston Kit (1 Pair Pistons, Rings, Pins and Clips). Wiseco Base and Intake Gasket Kit (For both cylinders). Fits the following Oil Cooled Harley Touring and Softail models. 2017 - 2019 Harley-Davidson Electra Glide Ultra Classic EFI FLHTCUI.2017 - 2019 Harley-Davidson Road Glide Custom FLTRX. 2017 - 2019 Harley-Davidson Road King EFI FLHR. 2018 - 2019 Harley-Davidson Softail Breakout FXBR.
2018 - 2019 Harley-Davidson Softail Deluxe FLDE. 2018 - 2019 Harley-Davidson Softail Fat Bob FXFB.
2018 - 2019 Harley-Davidson Softail Fat Boy FLFB. 2018 - 2019 Harley-Davidson Softail Heritage Classic FLHC. 2018 - 2019 Harley-Davidson Softail Low Rider FXLR. 2018 - 2019 Harley-Davidson Softail Slim FLSL. 2018 - 2019 Harley-Davidson Softail Sport Glide FLSB.2018 - 2019 Harley-Davidson Softail Street Bob FXBB. 2017 - 2019 Harley-Davidson Street Glide EFI FLHX. Wiseco K2787 11:1 Piston Specs. Bore - Standard: 3.937in. Bore - Actual: 4.250in. Compression Ratio - Actual: 11:1. Valve Pocket Depth - Intake. Valve Pocket Dia - Intake: 1.800in. Valve Pocket Depth - Exhaust.
Valve Pocket Dia - Exhaust: 1.800in. Wiseco W6984 Gasket Kit Specs.Note: OEM Harley head nuts are not included. Per Harley Davidson's manual, head bolts are single use and should be replaced during each reassembly. The item "Harley Davidson Milwaukee 8 124 Big Bore Kit 4.25 Bore Wiseco Pistons Gaskets" is in sale since Tuesday, August 27, 2019. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Big Bore & Top End Kits". The seller is "motorsports_hub" and is located in Phoenix, Arizona. This item can be shipped worldwide.