Hi paul i'am in auck was all geared up to race the club and some F3 races this year had done some serious practice at Pukekohe some reasonable lap times consistant 1.14 's and 1.13's so i would have been on the pace but started to have probs on start up top cylinder not firing at first start up.Turns out when I stripped it down there was enormous wear in top cylinder lining with some nipping on the exhast bridge so i guess a lack of comp on start up in that cylinder.Have not dynoed it yet but will post when I re-build and set up.As for the bike all road gear gone running pre-mix 30:1 sp front forks sp rear shock magtek wheels Super Cosa tyres De-restricted as per tyga guide lines,hrc jet kit air box mods.Belive it or not but even with the shagged cylinder the bike was running well.The 400's would only pull away on the back straight but only just,guess i need to lose weight.The only gripe i have with the bike is the suspension is to soft.But the reason i posted is I want the bike to at least run as well as before i dont want cylinders that have specs for a different stroke or piston size this would just knock me back even more and don't even mention the cost as this has knocked me for six.Hav'nt seen any other MC 21's up here but there is a guy ho hoon on a rgv and another on an aprilia rs.where do u race?,what your bike do could be interesting.See ya .Bruno