While we would like to accommodate upgrades and modifications to the bike, we unfortunately cannot. Our approach to standardize Flash is in an effort to offer the lowest price possible while also simplifying the buying process for most buyers. We know that for advanced riders who want to customize, this might not be great news.
Our headset/stem use standard fitting sizes, so an experienced owner/mechanic could make modifications like adding a suspension fork, but we cannot support nor warrant those modifications.