sonic699

Hi everybody i have only just took up Trial Biking and really need some help i have bourght a Beta from my boss at work he said it was a 2004 Beta Rev 3 300cc but ive now found out they dont do a 300cc where can i look on the bike to find out what bike it is ? Also i have been out on her a couple of nights and found that clutch is slipping when in 3rd or above do i just need to replace the clutch plates like these http://www.ebay.co.uk/itm/Beta-Techno-Rev-3-Evo-Trials-Friction-Clutch-Plate-Set-/380461403096?pt=UK_Motorcycle_Parts&hash=item5895444bd8 Thanks in advance