Yeah, its only 3" but does look large.
The engine was built by a friend of mine - I made the engine loom, fitted and mapped the Syvecs S8. Its running a 350Z drive by wire throttle so we can use auto blip on down shifts and has the bike sequential gearbox. We can do full throttle up shifts too, so no lag at all
Going to give it a go on race fuel soon - should go over 500bhp.