Remove the valve core entirely.
How can you remove it partially? :P
I could imagine you partially removing it - loosening the valve core and then trying to inject sealant. Am just trying to second guess ways you could make this even more complicated.
Sounds like something you've done. Don't assume everyone has your poor wrenching skills. :P
@dancing james started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
How can you remove it partially? :P