S&S Cycle Big Bore Kit for Milwaukee-Eight Overview 

Find the right S&S Cycle Big Bore Kit for your bike! bit.ly/3ZTmlB8

Most riders of the M8's dont realize the power thats available in keeping the 114". I had planned to go big bore since I bought me 2022 street glide special new in December. However, I did a stage 2 kit zippers kit on my stock 114" motor. Now I had a great tuner and bought the right parts to make a great combination. I made 128hp/129tq to wheels from a 114" for about 4600$ Parts list as follows. Zippers stage 2 kit with their 472 cam, Sawicki 2-1 full stainless exhaust, screaming eagle 64mm throttle body and matching intake, bigger injectors, screaming eagle ventilator air cleaner and power vision tuner. I have power everywhere. I'm @ 129tq @ 2700rpm and stay over 120tq till 5200rpm. I make 100hp @ 4200rpm and 128hp @ 5200rpm and carries 128hp over 6200rpm. Bike rides stock at any rpm and only is nasty when I want it to be. 1st thru 3rd get its pulling front wheel off the ground and great wheelies in 1st. Im actually reconsidering going big bore because i only wanted 140 to 150hp but hard to justify spending extra 6 or 7k for 10 to 20 more hp. Hope this helps someone out looking for real data

Just did the S&S 129 kit with the S&S 550c and I got to say it was worth every penny!

Thanks for the info re cast iron sleeves over the new ones

From what I understand, if you do the new S&S 132" kit, but add a 4-5/8"stroker flywheel, it can be a 136" motor, amazing for no case boring

Hell Yes!

Original head fits? How about the screaming eagle cnc portet head? No manifold changes needed?

if i put on a big bore 128 do i need a bigger throttle body or just bigger injectors

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Fuel moti offers a 132ci bolt on kití🤔

Do APE kits

107 M8 info please ..... if I bored Standard genuine HD 117 cylinders to 119 spec and used pistons from the M8 SE 107 to 119 kit would that work on the 107 shorter stroke bottom end ? is it the cylinders that are different lengths ( Hight ) or is it the pistons .