Stroke on 114 vs 107 M8's

[klammer76]

I was looking at the specs on the 2019 bikes today on the HD website. I noticed that the 114 bikes have a 4.5" stroke and the 107's are 4 3/8". If going with a stage kit on a 107, I assume this is done by a larger bore cylinder than the factory 114's come with. How would the two compare (ie the 4.5 vs 4 3/8 lower ends) in two 114's side by side. I didn't realize the 2019 factory 114's had a 4.5" stroke.

Thanks
klammer

[Tail Ridr]

I think Screamin' Eagle does it with a 4.075 cylinder kit, much in the same fashion as the 110 drop-on, I assume.

[rigidthumper]

Yes. M8 configurations are:
stock 107-3.937 X 4.375, CVO 114-4.016 X 4.5, CVO 117-4.075 X 4.5

Upgrade 107 to 114-4.075 X 4.375
Upgrade 107 to 117-4.125 X 4.375
Upgrade 114/117 to 120-4.125 X 4.5
Upgrade 107 to 124-4.25 X 4.375
Upgrade 114/117 to 128-4.25 X 4.5
Sure there are more options to come- Star Racing is showing 133-137-143 development, and someone here was offering a 153"