Further news on the airtubes I received my newly gasflowed heads last week and have made some interesting observations. Stock each 999S heads/inlet flow 123lps or 260cfm at 25" of water Each airtube flows 302cfm at 25" water. After having my heads gas flowed, there has been a 10% increase in theorical power for the bike. I was concerned that the standard airtubes would not provide sufficient flow so had them checked. Conclusion, the standard airtubes only pose a restriction on a bike with that produces more than 170hp. A problem for the 999RS04 with 189+hp but not for a streetbike. I understand a few of you may be looking to replace them, because they look so restrictive, but the reality is they are not, so save your money. |