CVO ST heads

[08flstf]

I haven't been on this site in a few years so forgive me if this is a stupid question. I've done a search but haven't found an answer. I'm considering a 24 FLTRX or even the Roadglide CVO ST.Are the heads on the ST (or the springs in the heads) capable of higher lift cams than the regular M8 heads? I know there is no tuning available as of yet, I'm just thinking about down the road.

[sbcharlie]

were doing a magazine article on these heads and compare to old style head

[rigidthumper]

Yes, they have better than the OG M8 springs. The SE bolt in cam for the 2024 FLHX/FLTRX is a .511 lift (which is the stock cam in the 121VVT and the FLTRXSTSE)

[08flstf]

Thanks for the replies, that's what I was looking for.

[rigidthumper]

Found the data for 18100140 (ovate spring) used on 2023.5 121, and 2024 FLHX/FLTRS
1.55" height 57.4 lbs
1.535" height 63.6 lbs
.950" height 235 lbs
.900" coil bind.

That spring will support up to .580" lift if valve to piston clearance is adequate.

[FLSTFIDave]

Yes, they have better than the OG M8 springs. The SE bolt in cam for the 2024 FLHX/FLTRX is a .511 lift (which is the stock cam in the 121VVT and the FLTRXSTSE)

The CVO 121 VVT and the CVO ST 121 HO run the same cam?

[rigidthumper]

Same grind (511), but the VVT (cam phaser) bolt center is different than the non VVT (cam retention) bolt center.