You are reading a single comment by @Dammit and its replies.
Click here to read the full conversation.
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.
@Dammit
96mm bore vs 100mm bore (i.e. 3.7l): gains are larger for the exhaust ports as these valves benefit more from the unshrouding effect of the larger bore