being 2 stroke fan i would also buy the aerox they are not going to drop a valve like the old leader 4v will in the gilera.and aeroxs are nice and have less problems.ps the aerox will be better off the mark but may have a bit less top end and the aerox may use a bit more fuel but its still better.ps i like the harry hill post it made me chuckle :)
adam bike doctor, May 2010